Liquiphant M FTL50 (H), FTL51 (H) : Technical Information

Technical Information
Liquiphant M FTL50(H), FTL51(H)

Vibronic
Point level switch for all kinds of liquids
The reliable function is not affected by flow, turbulence,

bubbles, foam, vibration, solids content or buildup. The
Liquiphant is thus the ideal substitute for float switches.
FTL50:
Compact design, ideal for mounting in pipes and for
installation in areas difficult to access
FTL51:
With extension pipe up to 3 m (6 m on request)
FTL50H, FTL51H:
With polished tuning fork and easy-to-clean process
connections and housings for food and pharmaceutical
applications
High corrosion-resistant AlloyC4 (2.4610), AlloyC22
(2.4602) is available for the fork and process connections
for applications in very aggressive liquids.
International approvals certify use in hazardous areas.
Your benefits
• Use in safety systems requiring functional safety to
SIL2/SIL3 in accordance with IEC 61508/
IEC 61511-1
• Large number of process connections to choose from:
universal usage
• Suitable for use in sterile applications in the life science
industry (device design according to ASME BPE-2007)
• PROFIBUS PA protocol: for commissioning and
maintenance
• No adjustment: quick, low-cost startup
• No mechanically moving parts: no maintenance, no
Application wear, long operating life
The Liquiphant M is a point level switch which can be • Monitoring of fork for damage: guaranteed function
used in all liquids • FDA-approved material (PFA Edlon)
– for process temperatures from –50 °C to 150 °C
• Compact stainless steel housing (optional): the IP69K
– for pressures up to 100 bar
protection rating guarantees the unit remains
– for viscosity up to 10,000 mm2/s
permanently tight and can keep out water even in the
– for densities ≥ 0.5 g/cm3 or ≥ 0.7 g/cm3,
event of intensive cleaning or flooding for several
other settings available on request
hours.
– foam detection on request
TI328F/00/en
71114953
Table of contents
Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Point level detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Electronic insert FEL56 (NAMUR L-H edge) . . . . . . . 13
Function and system design. . . . . . . . . . . . . . . . . . . . . 4 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Measuring principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Modularity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electronic versions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Electronics for continuous density measurement . . . . . . . . . . . . . . 5 Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Galvanic isolation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electronic insert FEL58 (NAMUR H-L edge) . . . . . . . 14
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Measured variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Measuring range (detection range) . . . . . . . . . . . . . . . . . . . . . . . . 5 Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electronic insert FEL51 (AC 2-wire) . . . . . . . . . . . . . . 6 Electronics FEL58 (NAMUR H-L edge,
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 in compact housing). . . . . . . . . . . . . . . . . . . . . . . . . . 15
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Electronics FEL51 (AC, in compact housing). . . . . . . . 7
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Electronic insert FEL57 (PFM). . . . . . . . . . . . . . . . . . 16
Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Electronic insert FEL52 (DC PNP) . . . . . . . . . . . . . . . . 8
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Electronic insert FEL50A (PROFIBUS PA) . . . . . . . . . 18
Electronics FEL52 (DC PNP, in compact housing) . . . . 9 Electronic insert FEL50D (density) . . . . . . . . . . . . . . 20
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Operating principle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Light signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Electronic insert FEL54 (AC/DC with relay output) . 11
Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Connection and function . . . . . . . . . . . . . . . . . . . . . . 22
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Connecting cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Safety mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Switching time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Switch-on behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electronic insert FEL55 (8/16 mA) . . . . . . . . . . . . . . 12 Performance characteristics. . . . . . . . . . . . . . . . . . . . 22

Power supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Reference operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Maximum measured error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Output signal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Repeatability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Signal on alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Hysteresis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
2 Endress+Hauser
Influence of medium temperature . . . . . . . . . . . . . . . . . . . . . . . 22 Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Influence of medium density . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Influence of medium pressure . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Sliding sleeves for unpressurized operation . . . . . . . . . . . . . . . . . 54
High pressure sliding sleeves . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Transparent cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Operating conditions . . . . . . . . . . . . . . . . . . . . . . . . . 23
Cover with sight glass . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Circular connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Examples of mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Operating Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Ambient temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Functional safety (SIL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Ambient temperature limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Safety Instructions (ATEX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Storage temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Safety Instructions (NEPSI) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Climate class . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Control Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Degree of protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
System information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Vibration resistance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Electromagnetic compatibility . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Medium conditions . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Medium temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Thermal shock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Medium pressure pe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Test pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
State of aggregation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Viscosity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Solids content . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Lateral loading capacity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Mechanical construction . . . . . . . . . . . . . . . . . . . . . . 27
Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Dimensions (in mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Weights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Material . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Process connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Human interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Electronic inserts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Compact housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Operating concept . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Certificates and approvals . . . . . . . . . . . . . . . . . . . . . 39

General approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
CRN approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Other certificates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Combinations of housings and electronic inserts . . . . . . . . . . . . . 39
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . 41
Liquiphant M FTL50, FTL51 product structure . . . . . . . . . . . . . . 41
Liquiphant M FTL50H, FTL51H product structure . . . . . . . . . . . 46
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Welding neck . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
G¾, d=55 with flange for flush-mounted installation . . . . . . . . . 51
G1, d=60 with flange for flush-mounted installation with sealing
surface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
G1, Sensor can be positioned . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
RD52, Sensor can be positioned . . . . . . . . . . . . . . . . . . . . . . . . . 53
DRD DN50 (65 mm), for flush-mounted installation of devices
with DRD flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
3 Endress+Hauser
Application
Point level detection Maximum or minimum detection in tanks or pipes containing all kinds of liquids, including use in hazardous
areas, food and pharmaceuticals.
L00-FTL5xxxx-11-05-xx-xx-000
Function and system design

Measuring principle The sensor's fork vibrates at its intrinsic frequency.
This frequency is reduced when covered with liquid. This change in frequency causes the point level switch to
switch.
Modularity Point level switch

FEL51/52/54
Liquiphant M FTL with electronic versions
FEL51, FEL52, FEL54
Point level switch

FEL55/56/57/58/50A
Liquiphant M FTL with electronic versions
FEL55, FEL56, FEL57, FEL58
Ex i
for connecting to a separate switching unit
or an isolating amplifier FEL50A Switching unit
for connecting to a PROFIBUS PA segment PLC
Isolating
amplifier
Segment
coupler
…
EX EX
L00-FTL5xxxx-15-05-xx-en-000
4 Endress+Hauser
Electronic versions FEL51:

Two-wire AC version;
Switches the load directly into the power supply circuit via an electronic switch.
FEL52:
Three-wire DC version;
Switches the load via the transistor (PNP) and separate connection.
FEL54:
Universal current version with relay output;
Switches the loads via 2 floating change-over contacts.
FEL55:
For separate switching unit; signal transmission 16/8 mA on two-wire cabling.
FEL56:
For separate switching unit; signal transmission L-H edge 0.6 to 1.0 / 2.2 to 2.8 mA
to EN 50227 (NAMUR) on two-wire cabling.
FEL58:
For separate switching unit; signal transmission H-L edge 2.2 to 3.5 / 0.6 to 1.0 mA
to EN 50227 (NAMUR) on two-wire cabling.
Checking of connecting cabling and other devices by pressing a key on the electronic insert.
FEL57:
For separate switching unit; PFM signal transmission;
Current pulses superposed on the power supply along the two-wire cabling.
Cyclical checking from the switching unit without changing levels.
FEL50A:
For connecting to PROFIBUS PA;
Cyclic and acyclic data exchange acc. to PROFIBUS-PA Profile 3.0 Discrete Input
Electronics for continuous FEL50D:

density measurement For connecting to Density Computer FML621
Galvanic isolation FEL51, FEL52, FEL50A:

Between sensor and power supply
FEL54:
Between sensor and power supply and load
FEL55, FEL56, FEL57, FEL58, FEL50D:
See connected switching unit
Design FTL50: Compact

FTL51: With extension pipe
FTL50H: Compact, with polished tuning fork and hygienic process connections
FTL51H: With extension pipe, polished tuning fork and hygienic process connections
Input
Measured variable Level (limit value)
Measuring range FTL50:

(detection range) Depends on mounting point
FTL51:
Depends on mounting point and the pipe extension. Standard 3000 mm (up to 6000 mm on request)
Density Adjustment on the electronic insert > 0.5 g/cm3 or > 0.7 g/cm3 (other on request)
Endress+Hauser 5
Electronic insert FEL51 (AC 2-wire)

Power supply Supply voltage: 19 to 253 V AC
Power consumption: < 0.83 W
Residual current consumption: < 3.8 mA
Short-circuit protection
Overvoltage protection FEL51: overvoltage category III
Electrical connection Two-wire AC connection

Switches the load directly into the power supply
circuit via an electronic switch. FEL51
Always connect in series with a load!
Check the following: 1 2

• The residual current in blocked state * External load R
(up to 3.8 mA) must be connected
• That for low voltage

– the voltage drop across the load is such that min.
the minimum terminal voltage at the electronic 19 V
insert (19 V) when blocked is not undershot.
– the voltage drop across the electronics when 1A
switched through is observed (up to 12 V)
• That a relay cannot de-energize with holding
power below 3.8 mA. *
If this is the case, a resistor should be R
connected parallel to the relay. An RC module
is available under the modification number
MVT2Y1278.
• When selecting the relay, pay attention to the L1 N N PE
holding power / rated power U~ max. 253 V AC
(Ground)
(see "Connectable load") 50/60 Hz
Output signal Safety mode Level Output signal LEDs

green red
IL
1 2
IL = load current Max.
(switched through)
< 3.8 mA
1 2
< 3.8 mA = residual current
(blocked)
IL
1 2
= lit
Min.
= unlit < 3.8 mA

1 2
L00-FTL2xxxx-07-05-
xx-xx-000 L00-FTL5xxxx-04-05-xx-xx-001
Signal on alarm Output signal on power failure or in the event of damaged sensor: < 3.8 mA
Connectable load • For relays with a minimum holding power/rated power > 2.5 VA at 253 V AC (10 mA) or
> 0.5 VA at 24 V AC (20 mA)
• Relays with a lower holding power/rated power can be operated by means of an RC module connected in
parallel.
• For relays with a maximum holding power/rated power < 89 VA at 253 AC or < 8.4 VA at 24 V AC
• Voltage drop across FEL51 max. 12V
• Residual current with blocked electrical switch: max. 3.8 mA.
• Load switched directly into the power supply circuit via the thyristor.
Transient (40 ms) max. 1.5 A, max. 375 VA at 253 V or max. 36 VA at 24 V (not short-circuit proof)
6 Endress+Hauser
Electronics FEL51 (AC, in compact housing)

Power supply Supply voltage: 19 to 253 V AC
Power consumption: < 0.83 W
Residual current consumption: < 3.8 mA
Short-circuit protection
Electrical connection Two-wire AC connection

Switches the load directly into
Connector MAX MIN
the power supply circuit via an
FTL5#(H)- #######C3# (GN/YE) (GN/YE)
electronic switch.
1 1
(BU) (BU) 2
(BK)
Always connect in series with a load!
3
(BN)
Check the following:
> 19 V > 19 V
• The residual current in blocked
state (up to 3.8 mA) R R
1.0 A 1.0 A
• that for low voltage
– the voltage drop across the load PE L1 N PE L1 N
(Ground) (Ground)
is such that the minimum
terminal voltage at the FTL5#(H)- #######D3#
(Pg11)
electronic insert (19 V) when 1 1 2
or
blocked is not undershot. FTL5#(H)- #######E3#
– the voltage drop across the (NPT ½") 3
electronics when switched
> 19 V > 19 V
through is observed
(up to 12 V) R R
1.0 A 1.0 A
PE L1 N PE L1 N
(Ground) (Ground)
• That a relay cannot de-energize with holding power below 3.8 mA.
If this is the case, a resistor should be connected parallel to the relay (RC module available on request).

green red
IL
1 3
IL
= load current Max.
(switched through) < 3.8 mA
1 3
< 3.8 mA
= residual current
(blocked) IL
1 2
= lit Min.
= unlit < 3.8 mA

L00-FTL2xxxx-07-05-
1 2
xx-xx-000
L00-FTL5xxxx-04-05-xx-xx-001a
Connectable load • For relays with a minimum holding power/rated power > 2.5 VA at 253 V AC (10 mA) or
> 0.5 VA at 24 V AC (20 mA)
• Relays with a lower holding power/rated power operated by means of an RC module connected in parallel.
• For relays with a maximum holding power/rated power < 89 VA at 253 AC or < 8.4 VA at 24 V AC
• Voltage drop across FEL51 max. 12V
• Residual current with blocked electrical switch: max. 3.8 mA.
• Load switched directly into the power supply circuit via the thyristor.
Transient (40 ms) max. 1.5 A, max. 375 VA at 253 V or max. 36 VA at 24 V (not short-circuit proof)
Endress+Hauser 7
Electronic insert FEL52 (DC PNP)

Power supply Supply voltage: 10 to 55 V DC
Ripple: max. 1.7 V, 0 to 400 Hz
Current consumption: max. 15 mA
Power consumption: max. 0.83 W
Reverse polarity protection
Electrical connection Three-wire DC connection

Preferably used with programmable logic
FEL52
controllers (PLC).
DI module as per EN 61131-2.
Positive signal at switching output of the
electronics (PNP);
1 2 3
Output blocked on reaching limit. (+)
0.5 A
e.g.
Relay
PLC
–
L+ L–
U–
... 10…55 V DC

green red
L+ IL +
1 3
(switched through)
< 100 µA
1 3
< 100 μA = residual current
(blocked)
L+ IL +
1 3
= lit Min.
= unlit < 100 µA

1 3
L00-FTL2xxxx-07-05-
xx-xx-000
Signal on alarm Output signal on power failure or in the event of damaged sensor: < 100 A
Connectable load • Load switched via the transistor and separate PNP connection, max. 55 V DC
• Load current max. 350 mA (pulsed overload and short-circuit protection)
• Residual current < 100 A (with transistor blocked).
• Capacitance load max. 0.5 F at 55 V, max. 1.0 F at 24 V
• Residual voltage < 3 V (with transistor switched through);
8 Endress+Hauser
Electronics FEL52 (DC PNP, in compact housing)

Ripple: max. 1.7 V, 0 to 400 Hz
Current consumption: max. 15 mA
Electrical connection Three-wire DC connection

Preferably used with programmable
Connector MAX MIN
logic controllers (PLC).
DI module as per EN 61131-2. FTL5#(H)- #######N3# 2 1 2 1
(M12x1) (WT) (BN) (WT) (BN)
Positive signal at switching 52018763
output of the electronics (PNP); 3 4 3 4
Output blocked on reaching limit. (BU) (BK) (BU) (BK)
R R
FTL5#(H)- #######N3#
(M12x1)
52010285 / 52024216 0.5 A 0.5 A
L– L+ L– L+
FTL5#(H)- #######D3#
(Pg11) 1 1
or
2 2
FTL5#(H)- #######E3#
(NPT ½") 3 + 3
+
R
– R
–
0.5 A 0.5 A
PE L– L+ PE L– L+
(Ground) (Ground)
FTL5#(H)- #######C3# (GN/YE) (GN/YE)

1 2 1 2
(BU) (BK) (BU) (BK)
3 + 3
(BN) (BN) +
R
– R
–
0.5 A 0.5 A
PE L– L+ PE L– L+
(Ground) (Ground)
Output signal With valve connector or cable tail

Safety mode Level Output signal LEDs
green red
L+ IL +
3 2
(switched through)
L+ < 100 µA +
3 2
< 100 μA = residual current
(blocked)
L+ IL +
2 3
= lit
Min.
= unlit L+ < 100 µA +

2 3
L00-FTL2xxxx-07-05-
L00-FTL5xxxx-04-05-xx-xx-004a
xx-xx-000
Endress+Hauser 9
With M12x1 connector 52010285 / 52024216 (without LEDs)

gn ye
rd Safety mode Level Output signal LEDs
L00-FTL5xxxx-16-05-
xx-xx-002
L+ IL –
1 2
Max.
IL = load current
L+ < 100 µA –
(switched through) 1 2
< 100 μA = residual current L+ –

(blocked) IL
1 4
Min.
= lit
L+ < 100 µA –
= unlit 1 4
L00-FTL2xxxx-07-05-
xx-xx-000
With M12x1 connector 52018763 (with LEDs)

ye 1
ye 2 gn
Safety mode Level Output signal LEDs
L00-FTL5xxxx-16-05-
xx-xx-001
L+ IL –
1 2
Max.
IL = load current
L+ < 100 µA –
(switched through) 1 2
< 100 μA = residual current L+ –

(blocked) IL
1 4
Min.
= lit
L+ < 100 µA –
= unlit 1 4
L00-FTL2xxxx-07-05-
xx-xx-000
Signal on alarm Output signal on power failure or in the event of damaged sensor: < 100 A
Connectable load • Load switched via the transistor and separate PNP connection, max. 55 V DC
• Load current max. 350 mA (pulsed overload and short-circuit protection)
• Residual current < 100 A (with transistor blocked).
• Capacitance load max. 0.5 F at 55 V, max. 1.0 F at 24 V
• Residual voltage < 3 V (with transistor switched through);
10 Endress+Hauser
Electronic insert FEL54 (AC/DC with relay output)

Power supply Supply voltage: 19 to 253 V AC, 50/60 Hz or 19 to 55 V DC
Electrical connection Universal current connection with relay output

Power supply:
FEL54
Please note the different voltage ranges
for AC and DC.
Output:
When connecting an instrument with 1 2 3 4 56 7 8
high inductance, provide a spark arrester
to protect the relay contact.
A fine-wire fuse (depending on the
load connected) protects the relay contact
on short-circuiting.
Both relay contacts switch simultaneously.
*
0.5 A
* When jumpered, the relay
output works with NPN logic.
** See "Connectable load"
NO C NC NO C NC
a u r a u r
L1 N PE ** **
L+ L– (Ground)
U~ 19…253 V AC, 50/60 Hz

U–
... 19… 55 V DC

green red
3 4 5 6 7 8
Max.
= relay energized 3 4 5 6 7 8
= relay de-energized
3 4 5 6 7 8
= lit
Min.
= unlit
3 4 5 6 7 8
L00-FTL2xxxx-07-05-
Signal on alarm Output signal on power failure or in the event of damaged sensor: relay de-energized
Connectable load • Loads switched via 2 floating change-over contacts (DPDT).

• I~ max. 6 A (Ex de 4 A), U~ max. 253 V AC; P~ max. 1500 VA, cos ϕ = 1, P~ max. 750 VA, cos ϕ > 0.7
• I% max. 6 A (Ex de 4 A) bis 30 V DC, I% max. 0.2 A to 125 V
• When connecting a low-voltage circuit with double isolation according to IEC 1010, the following applies:
total of voltages of relay output and power supply max. 300 V.
Endress+Hauser 11
Electronic insert FEL55 (8/16 mA)

Power consumption: < 600 mW
Electrical connection Two-wire connection for separate switching unit

For connecting to programmable
FEL55
logic controllers (PLCs) for example,
AI module 4 to 20 mA to EN 61131-2.
Output signal jump from high to
low current on limit.
1 2
EEx ia
EX
EX
– +
U–
... 11…36
11…36 V DC
e.g. PLC

green red
+ ~16 mA
2 1
Max.
+ ~8 mA
~ 16 mA = 16 mA ± 5 % 2 1
~ 8 mA = 8 mA ± 6 %
+ ~16 mA
2 1
= lit
Min.
= unlit + ~8 mA
2 1
L00-FTL2xxxx-07-05-
xx-xx-000
Connectable load • R = (U - 11 V) : 16.8 mA

• U = connection voltage: 11 to 36 V DC
Example:
PLC with 250 Ω with 2-wire version
250 Ω = (U – 11V) / 16.8 mA

4.2 [Ω/Α] = U – 11 V
U = 15.2 V
12 Endress+Hauser
Electronic insert FEL56 (NAMUR L-H edge)

Power supply Power consumption: < 6 mW at I < 1 mA; < 38 mW at I = 2.8 mA
Connection data interface: IEC 60947-5-6

For connecting to isolating amplifiers acc. to
NAMUR (IEC 60947-5-6), e.g. FTL325N, FEL56
FTL375N from Endress+Hauser.
Output signal jump from low to
high current on limit.
(L–H edge) 1 2
Connecting to multiplexer:
Set clock time to min. 2 s.
EEx ia
EX
I
EX
L
– +
Isolating amplifier
to IEC 60947-5-6
(NAMUR)

green red
0.6 …
+ 1.0 mA
2 1
Max.
2.2 …
+ 2.8 mA
2 1
= lit 0.6 …
+ 1.0 mA
2 1
= flashes
Min.
2.2 …
= unlit + 2.8 mA
2 1
L00-FTL5xxxx-07-05-
xx-xx-002
Signal on alarm Output signal in the event of damaged sensor: > 2.2 mA
Connectable load See Technical Data of the isolating amplifier connected according to IEC 60947–5–6 (NAMUR)
Endress+Hauser 13
Electronic insert FEL58 (NAMUR H-L edge)


For connecting to isolating amplifiers acc. to
FEL58
NAMUR (IEC 60947-5-6), e.g. FTL325N,
FTL375N from Endress+Hauser.
low current on limit.
1 2
(H–L edge)
Additional function:
Test key on the electronic insert.
EEx ia
Pressing the key breaks the connection
to the isolating amplifier.
EX
! Note!
H
In Ex–d applications, the additional function
can only be used if the housing is not exposed I
to an explosive atmosphere. EX
L
Connecting to multiplexer:
Set clock time to min. 2 s.
– +
Isolating amplifier
to IEC 60947-5-6
(NAMUR)

green
yellow
2.2 …
+ 3.5 mA
2 1
Max.
0.6 …
+ 1.0 mA
2 1
= lit 2.2 …
+ 3.5 mA
2 1
= flashes
Min.
0.6 …
= unlit + 1.0 mA
2 1
L00-FTL5xxxx-07-05- L00-FTL5xxxx-04-05-xx-xx-007
xx-xx-002
Signal on alarm Output signal in the event of damaged sensor: < 1.0 mA
Connectable load • See Technical Data of the isolating amplifier connected according to IEC 60947–5–6 (NAMUR)
• Connection also to isolating amplifiers which have special safety circuits (I > 3.0 mA)
14 Endress+Hauser
Electronics FEL58 (NAMUR H-L edge,

in compact housing)

For connecting to isolating
Connector MAX MIN
amplifiers acc. to NAMUR
FTL5#(H)- #######N3#
(IEC 60947-5-6), e.g. FTL325N, (M12x1)
FTL375N from Endress+Hauser. 2 1 2 1
52018763 (BN) (BN)
(WT) (WT)
low current on limit
3 4 3 4
(BU) (BK) (BU) (BK)
(H–L edge) FTL5#(H)- #######N3#
(M12x1)
Additional function: 52010285 / 52024216
If the test magnet is held – + – +

against the marking on the
nameplate, the output signal is FTL5#(H)- #######D3#
inverted. (Pg11)
or 1 1
2
FTL5#(H)- #######E3#
Connecting to multiplexer: (NPT ½")
Set clock time to min. 3 s. 3
The NAMUR interface has a

defined power consumption rate. + – + –
FTL5#(H)- #######C3#
Thus, it is not possible to use 1 1 2
(BU) (BU) (BK)
the M12 connector with an
integrated LED (52018763)
3
(BN)
+ – + –

green
yellow
2.2…
+ 3.5 mA –
1 3
Max.
0.6…
+ 1.0 mA –
1 3
= lit 2.2…
+ 3.5 mA –
1 2
= flashes Min.
0.6…
= unlit + 1.0 mA –
1 2
L00-FTL5xxxx-07-05- L00-FTL5xxxx-04-05-xx-xx-007a
xx-xx-002
Signal on alarm Output signal in the event of damaged sensor: < 1.0 mA
Connectable load • See Technical Data of the isolating amplifier connected according to IEC 60947–5–6 (NAMUR)
• Connection also to isolating amplifiers which have special safety circuits (I > 3.0 mA)
Endress+Hauser 15
Electronic insert FEL57 (PFM)

Power supply Supply voltage: 9.5 to 12.5 V DC
Current consumption: 10 to 13 mA
Power consumption: < 150 mW

For connecting to Nivotester switching units
FEL57
FTL320, FTL325P, FTL370,
FTL372, FTL375P (also with
cyclical checking) from Endress+Hauser.
Output signal jump of the PFM signal
from high to low frequency 1 2
when sensor is covered.
Switching between minimum/maximum
safety in the Nivotester.
EEx ia
Additional function “cyclical checking”:
After interruption of the power supply, EX
a test cycle is activated
which checks the sensor and electronics
without any change in level. PFM
50 /
Approved for overfill protection acc. to 150 Hz
WHG (German Water Resources Act). EX
The following can be switched at the
electronic insert: – + Nivotester
FTL320
– Standard 7 8 FTL325P 1CH
(STD): 33 34 FTL325P 3CH
Corrosion of the fork unlikely; 37 38
simulation approx. 8 s FTL370/372
tuning fork exposed – covered – exposed. d4 d2 FTL375P 1CH
Input 1
This setting tests level reporting in the Nivotester
during cyclical checking. FTL372
z4 z2 FTL375P 2CH
– Extended (EXT): Input 2
Corrosion of the fork possible; FTL375P 3CH
z6 d6
Simulation approx. 41 s: tuning fork exposed – Input 3
covered – corroded – exposed. L00-FTL5xxxx-04-05-xx-en-003
This setting tests level reporting and alarm

notification in the Nivotester during cyclical
checking.
The check is activated and monitored at the switching

unit.
16 Endress+Hauser
Switching behavior of the connected device:
Fail-safe mode Setting Fork Switching status of relay in switching unit

set at at FEL57 on = energised off = de-energised
switching unit
Test start End of test start
(power off) (power on)
>3s
Max. STD free on off ~ 5 s off ~ 2 s on ~ 2 s off on

Max. EXT free on off ~ 5 s off ~ 2 s on ~ 35 s off on
Max. STD covered off off off
Max. EXT covered off off off
Min. STD free off ~ 3 s on ~ 5 s off ~ 3 s on off
*
Min. EXT free off ~ 3 s on ~ 7 s off ~ 30 s on off
*
Min. STD covered on ~ 3 s on ~ 5 s off on
*
Min. EXT covered on ~ 3 s on ~ 5 s off ~ 35 s on ~ 3 s off on
*
* De-energized on power supply failure
Please note this switching response and function of the plant especially when replacing a
Liquiphant with an EL17Z or FEL37 electronic insert with a Liquiphant M with an FEL57 electronic insert.

(PFM) green yellow
150 Hz
= lit
= unlit 50 Hz
L00-FTL2xxxx-07-05-
xx-xx-000
Signal on alarm Output signal on power failure or in the event of damaged sensor: 0 Hz
Connectable load • Floating relay contacts in the connected switching device Nivotester FTL320, FTL325P,
FTL370, FTL372, FTL375P
• For contact load, see the Technical Data of the switching unit
Endress+Hauser 17
Electronic insert FEL50A (PROFIBUS PA)

Power supply Bus voltage: 9 to 32 V DC
Bus current:
• 12.5 mA +/– 1.0 mA (software version: 01.03.00, hardware version: 02.00)
• 10.5 mA +/– 1.0 mA (software version: 01.03.00, hardware version: 01.00)
Electrical connection Two-wire connection for power supply and data transfer
For connecting to PROFIBUS PA

FEL50A
Additional functions:
– Digital communication enables the
representation, reading and editing
1 2
of the following parameters:
Fork frequency, switch-on frequency,
switch-off frequency, switch-on time and
switch-off time, status, measured value, density
switch.
– Matrix locking possible
– Switch to WHG mode possible EX
(WHG approval).
– For a detailed description, see BA198F
– You can also visit
www.profibus.com for more information EX
PA– PA+
–
–
PROFIBUS PA
U–
... 9…32 V DC
–
Segment coupler
–
PC with Commuwin II
Proficard or Profiboard
PLC
Segment coupler
PROFIBUS DP
EX
PROFIBUS PA
EX
18 Endress+Hauser
Output signal Setting Level LEDs FEL50A

green yellow
OUT_D = 0
PA bus signal
not
inverted OUT_D = 1
PA bus signal
OUT_D = 1
PA bus signal
= lit inverted
OUT_D = 0
= unlit PA bus signal
L00-FTL2xxxx-07-05-
Signal on alarm • Failure information can be opened using the following interfaces:
Yellow LED flashing, status code, diagnostic code; see BA198F
Endress+Hauser 19
Electronic insert FEL50D (density)

Power supply Frequency range: 300 to 1500 Hz
Signal level: 4 mA
Pulse height: 16 mA
Pulse width: 20 μS
Electrical connection Two-wire connection at Density Computer FML621

For connecting to the density and concentration computer FEL50D
FML621.
The output signal is based on pulse technology.

With the aid of this signal, the fork frequency is constantly 1 2
forwarded to the switching unit. –+
" Caution!
Operation with other switching units, EEx ia
such as FTL325P, is not permitted.
This electronic insert cannot be installed in EX
devices that were originally used as a point level switch.
pulse
EX
– +
FML621
10 82 On
Endress+Hauser
FML621
112 182
TI420Fde004
Signal on alarm Output signal on power failure or in the event of damaged sensor: 0 Hz
Adjustment In the Liquiphant M modular system, the option of adjustment is also provided in addition to the electronics
(see feature 60: "Accessories").
There are three types of adjustment:
Standard adjustment (see ordering information for additional options, basic version A)
• Here, two fork parameters are determined to describe the sensor characteristics, indicated in the adjustment
report and provided with the product.
These parameters must be transmitted to the Density Computer FML621.
Special adjustment (see ordering information for additional options, special adjustment, density H2O (K) or
special adjustment, density H2O with 3.1 certificate (L))
• Here, three fork parameters are determined to describe the sensor characteristics, indicated in the
adjustment report and provided with the product.
These parameters must be transmitted to the Density Computer FML621.
Greater accuracy is achieved with this type of adjustment (see also "Performance characteristics").
Field adjustment
• During field adjustment, a density value actually determined by the customer is entered and the system is
automatically adjusted to this value (wet adjustment).
! Note!
Further information on Liquiphant M Density is available in Technical Information TI420F. This document is
available for download at www.endress.com => Download.
20 Endress+Hauser
Operating principle Measuring the density of a liquid medium in pipes and tanks. Also suitable for use in hazardous areas, and
preferably for applications in the chemical and food industry.
EX EX
* *
Endress+Hauser
RMM621
On
FML621
PLC/SPS
Endress+Hauser
RMM621
1. 2. 3. 4.
On
FML621
PLC/SPS
TI420Fxx016
* Pressure and temperature information required depending on the application.

1. Liquiphant M sensor with electronic insert FEL50D (pulse output);
2. Temperature sensor (e.g. 4 to 20 mA output);
3. Pressure transmitter (4 to 20 mA output);
4. Liquiphant density and concentration computer FML621 with display and operating unit
Light signals LED Symbol Information
Yellow Measurement valid
Unstable process situation
Maintenance required
Green Power on
Power off
Red No fault
Maintenance required
Device failure
Endress+Hauser 21
Connection and function

Connecting cables • Electronic inserts: cross-section max. 2.5 mm2; strand in ferrule to DIN 46228
• Protective earth in housing: cross-section max. 2.5 mm2
• External equipotential bonding connection on housing: cross-section max. 4 mm2
Safety mode Minimum/maximum residual current safety selectable on electronic insert.

(with FEL57 on Nivotester only)
Max. = maximum safety:
The output switches to the power fail response when the fork is covered
For use with overfill protection for example
Min. = minimum safety:
The output switches to the power fail response when the fork is exposed
For use with dry running protection for example
Switching time When fork is covered: approx. 0.5 s

When fork is exposed: approx. 1.0 s
(Other switching times on request.)
Additionally configurable for PROFIBUS PA: 0.5-60 s
Switch-on behavior When switching on the power supply, the output assumes the alarm signal.
After max. 3 s it assumes the correct switching mode (exception: FEL57)
Performance characteristics
Reference operating Ambient temperature: 23 °C
conditions
Medium temperature: 23 °C
Medium density: 1 g/cm3 (water) Switchpoint
13 mm
2 for
Viscosity: 1 mm /s reference conditions
Medium pressure pe: 0 bar

Sensor mounting: vertical from above
Density switch: to > 0.7
Maximum measured error Max. +/–1 mm (at reference operating conditions)
Repeatability 0.1 mm
Hysteresis Approx. 2 mm
Influence of medium Max. +1.8 to –2.8 mm (–50 to +150 °C)

temperature
Influence of medium density Max. +4.8 to –3.5 mm (0.5 to 1.5 g/cm3)
Influence of medium pressure Max. 0 to –2.5 mm (–1 to 64 bar)
22 Endress+Hauser
Operating conditions
Installation Installation instructions
Switch points on the sensor depend on the mounting position, with reference to water,
Density 1 g/cm3, 23 °C, pe 0 bar.
4 mm
4 mm
13 mm
Mounting from above Mounting from below Mounting from the side
! Note!
The switch points of the Liquiphant M are at other positions to those of the previous version Liquiphant II.
Examples of mounting Examples of mounting with regard to the viscosity ν of the liquid and the tendency to form buildup
Optimum mounting, without problem even with high viscosity:

Position the fork so that the narrow edge of the tines is vertical to ensure that the liquid can run off easily.
Vertical from above Flush-mounted from the side
Endress+Hauser 23
With buildup on the tank walls:

* Ensure that there is sufficient distance between the buildup expected on the tank wall and the fork.
*
*
Vertical from above Protruding into the tank from the side
Mounting positions with low viscosity (up to 2000 mm2/s):

* Deburr the nozzle surfaces
*
* min. 25
(min. 1 in)
Mounting in piping from 2"

Flow velocities up to 5 m/s for viscosity 1 mm2/s and density 1 g/cm3.
(Check the function for other medium conditions.)
24 Endress+Hauser
Support the Liquiphant M FTL51(H)

in the event of severe dynamic load.
.. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..
Ensure adequate space outside the .................................................................................................................................
.. ...... ...... ...... ...... ...... ....

.. .. .. .. .. .. .....................................................................
tank for mounting, connection and
configuration.
.. .. .. .. .. .. .. .. .. .. .. .. .
Orientation FTL50(H) and FTL51(H) with short pipe (up to approx. 500 mm) - any position,
FTL51(H) with long pipe - vertical
Environment
Ambient temperature range Permitted ambient temperature Ta at the housing depending on the medium temperature Tp in the tank:
Ta
Ta ** *
70 °C
50 °C
0 °C
Tp
–50 °C 0 °C 50 °C 100 °C 150 °C Tp
90 °C
–50 °C
* Additional temperature range for devices with a temperature spacer or Pressure tight feed through.
** Maximum ambient temperature with FEL50D/FEL50A in hazardous areas.
Ambient temperature limits –50 to +70 °C (function with restricted data)
Endress+Hauser 25
Storage temperature –50 to +80 °C
Climate class Climate protection to IEC 68, Part 2-38, Fig. 2a
Degree of protection Types of housing IP65 IP66* IP67* IP68* IP69k NEMA4X**
Compact housing with valve connector X – – – – –
Pf11/NPT ½
Compact housing with 5 m cable tail – X – X – –
Compact housing with M12x1 connector – X – X – –
(52010285) 316L (metal)
Compact housing with elbowed connector – X – X X –
(52024216) / L= 5 m, without integrated
LEDs
Compact housing with elbowed connector – X – X X –
(52018763) / L= 5 m, with integrated
LEDs
Polyester housing F16 – X X – – X
Stainless steel housing F15 – X X – – X
Aluminum housing F17 X X X – – X
Aluminum housing F13 X X – X*** – X
Stainless steel housing F27 – X – X – 4x/6P
Aluminum housing T13 with separate X X – X*** – 4x/6P
connection compartment (EEx d)
* As per EN60529
** As per NEMA 250
*** Only with M20 cable entry or G1/2 thread
Vibration resistance To IEC 68, Part 2-6 (10 to 55 Hz, 0.15 mm, 100 cycles)
In the event of increased vibrations, we recommend the additional fitting feature "060" version "P" 100 bar
process pressure.
Electromagnetic Interference emission to EN 61326, Electrical Equipment Class B

compatibility Interference immunity to EN 61326; Annex A (Industrial) and NAMUR Recommendation NE 21 (EMC)
Medium conditions
Medium temperature –50 to +150 °C; see "Process connections" for exceptions
Thermal shock Max. 120 °C/s
Medium pressure pe
pe
bar
(psi)
(psi)
*
100
(1450)
64
(928)
Tp
–1 °C
–50 (–14.5) 0 (°F)
150
(–58) (32) (300)
* Allowed pressure rating when the "100 bar" option is selected (see "Product structure FTL51", feature 060,
→ ä 41ff.). See "Process connections" for exceptions.
26 Endress+Hauser
Please refer to the standards listed for the permitted pressure values of the flanges at higher temperatures:
• pR EN 1092-1: 2005
With regard to their stability-temperature property, the materials 1.4435 and 1.4404 are identical and are
grouped together under 13E0 in EN 1092-1 Tab. 18. The chemical composition of the two materials can be
identical.
• ASME B 16.5a - 1998 Tab. 2-2.2 F316
• ASME B 16.5a - 1998 Tab. 2.3.8 N10276
• JIS B 2220
The lowest value from the derating curves of the device and selected flange applies in each case.
Test pressure pe = 64 bar:

Max. 100 bar (1.5 times the medium pressure pe); no function during test pressure
Sensor burst pressure 200 bar
pe = 100 bar:
Max. 150 bar (1.5 times the medium pressure pe); no function during test pressure
Sensor burst pressure 400 bar
State of aggregation Liquid
Density 0.7 g/cm3 = delivery status

0.5 g/cm3* can be adjusted via switches
* Density settings for the compact housing on request
Viscosity Max. 10000 mm2/s
Solids content Max. ø5 mm
Lateral loading capacity ≤ 75 Nm
Mechanical construction
Design Summary of all electrical and mechanical versions
Plug-in electronic inserts to mount in the housing
FEL51*: Two-wire AC connection

FEL52*: Three-wire DC connection PNP
FEL54: Universal current connection, 2 relay outputs
FEL55: Output 16/8 mA for separate switching unit
FEL56: Output 0.6 to 1.0 / 2.2 to 2.8 mA for separate switching unit (NAMUR)
FEL58*: Output 2.2 to 3.5 / 0.6 to 1.0 mA for separate switching unit (NAMUR)
L00-FTL5xxxx-03-05-xx-xx-000 FEL57: Output 150/50 Hz, PFM, for separate switching unit (Nivotester)
FEL50A: Digital communication PROFIBUS PA
FEL50D: Pulse output for Density Computer FML621
* Electronics also available as compact housing. The electronics cannot be exchanged!
Endress+Hauser 27
Housing
L00-FTL5xxxx-03-05-xx-xx-019 L00-FTL5xxxx-03-05-xx-xx-001 L00-FTL5xxxx-03-05-xx-xx-002 L00-FTL5xxxx-03-05-xx-xx-003 L00-FTL5xxxx-03-05-xx-xx-004
Compact F16 F15 F17/F13 T13

Pipe housing Polyester (PBT) Stainless steel Aluminum Aluminum with separate
(316L) (316L) (also for EEx d), connection compartment
coated (also EEx de and EEx d),
F27 coated
Stainless steel
(316L)
Bushings (optional)
Temperature spacer and pressure tight feed through
Process connections
L00-FTL5xxxx-03-05-xx-xx-006 L00-FTL5xxxx-03-05-xx-xx-007 L00-FTL5xxxx-03-05-xx-xx-008 L00-FTL5xxxx-03-05-xx-xx-009
G ¾, DIN ISO 228/I G 1, DIN ISO 228/I Diverse Flanges to DIN, ANSI,
R ¾, EN10226 R 1, EN10226 hygienic and JIS
NPT ¾, ANSI B 1.20.1 NPT 1, ANSI B 1.20.1 aseptic from DN 25 / 1"
(AF 32) (AF 41) connections
Sensors Compact Length L Length L II

Compact,
with extension pipe up to 3 m (up to 6 m on request)
or special "length L II" (see → ä 30ff.)
pe = 64 bar 64 bar 64 bar

100 bar 100 bar
28 Endress+Hauser
Dimensions (in mm) Housing and sensor FTL50(H)
Compact housing, primarily for hygienic

1. 2. 3.
applications 40
30
166
141
133
ø40 ø40 ø40
232
206
199
32 AF 32 AF 32 AF
*
1. 5 m cable
2. M12 connector
3. Pg11/NPT ½ connector L00-FTL5xxxx-06-05-xx-en-008
Polyester housing F16 ø85 max. 76
max. 155
max. 40.7
*
17.5
Stainless steel housing F15, primarily for ø76 max. 64

hygienic applications
max. 150
~25
*
Aluminum housing F17/F13 max. 69

Stainless steel housing (316L) F27 ø80 max. 60
max. 173
ø21.5
*
10
Endress+Hauser 29
Aluminum housing T13 max. 65 max. 97

with separate connection
compartment
max. 190
*
* See "Process connections"
! Note!
Bushings: temperature spacer, pressure tight feed through

Temperature spacer
Provides sealed insulation for the vessel
and normal ambient temperatures
for the housing.
Pressure tight feed through

Protects the housing from pressures
up to 100 bar if the sensor is damaged. Vessel
insulation
Provides sealed insulation for the
vessel and normal ambient temperatures additional length
140 mm
for the housing.
Process connections for FTL50(H) and FTL51(H)
Process connection Dimensions Accessories Pressure

Temperature
G¾ GQ2 Max. 100 bar

66.5
DIN ISO 228/l GQ5 (only FTL51)
with defined GQ6 32 AF 50.5 Max. 150 °C
thread start
With elastomer
flat seal to
DIN 7603: L00-FTL5xxxx-06-05-xx-en-001
supplied
G¾ GQ2 Welding neck Max. 25 bar

66.5
DIN ISO 228/l GQ5 (with defined Max. 150 °C
with defined GQ6 32 AF 50.5 thread start)
thread start with silicone O-ring Max. 40 bar
Endress+Hauser Max. 100 °C
For flush-mounted 52001052
installation in
L00-FTL5xxxx-06-05-xx-en-001 In conformity with
welding neck
FDA*
See "Accessories"
G1 GR2 69 Max. 100 bar

DIN ISO 228/l GR5 41 AF (only FTL51)
50.5
GR6 Max. 150 °C
With elastomer
flat seal to
DIN 7603:
supplied
30 Endress+Hauser

Temperature
* FDA approved materials according to 21 CFR Part 177.1550/2600
G1 GW2 80 Welding neck Max. 25 bar

DIN ISO 228/l 41 AF (with defined Max. 150 °C
61.3
with defined thread start)
thread start with silicone O-ring Max. 40 bar
With seal surface 52001051
for flush-mounted
In conformity with
installation in L00-FTL5xxxx-06-05-xx-en-003
FDA*
welding neck
See "Accessories"
NPT ¾ GM2 In conformity with Max. 100 bar

(76)
ANSI B 1.20.1 GM5 FDA* (only FTL51)
32 AF 50.5
GM6 Max. 150 °C
or
R¾
EN10226 GE2
GE5
GE6
NPT1 GN2 (80) In conformity with Max. 100 bar

ANSI B 1.20.1 GN5 41 AF FDA* (only FTL51)
50.5
GN6 Max. 150 °C
or
R1
EN10226 GF2
GF5
GF6
Flanges Seal See nominal pressure

ANSI B 16.5 A## depending on design of flange, however
66.5
EN 1092-1 B## installed on site Max. 100 bar
(DIN 2527 B) C## (only FTL51)
In conformity with
JIS B2220 F## Max. 150 °C
FDA*
N##
K##
AlloyC4/C22 -plated flanges are available for higher chemical-resistance. The flange carrier
material comprises 316L and is welded with a 2 to 3 mm thick AlloyC4/C22 disk.
Tri-Clamp 66.5
Clamping ring and Max. 16 bar
1 ½" = ø50.5 mm TC2 front seal Max. 120 °C
2" = ø64.0 mm TE2 installed on site
ISO 2852 Max. 2 bar
In conformity with
Max. 150 °C
FDA*
Mounting with NA connector (as per ASME, TUBE Standard ASTM A276) only in conjunction
with T13, F13 and compact housing. Other housings on request.
Threaded pipe joint Sealing ring with collar, DN 32, DN 40:
DN 32 MA2 66.5 installed on site Max. 40 bar to 100 °C
DN 40 MC2 Max. 25 bar to 140 °C
In conformity with
DN 50 ME2
FDA*
DIN 11851 DN 50:
Max. 25 bar
With thread adapter nut Max. 140 °C
* FDA approved materials according to 21 CFR Part 177.1550/2600
Endress+Hauser 31

Temperature
Flush-mounted for EE2 Welding neck Max. 40 bar

55.5
welding neck (fork can be Max. 100 °C
Factory standard positioned)
Endress+Hauser with Endress+Hauser Max. 25 bar
silicone seal 52001047 Max. 150 °C
and thread adapter nut:
In conformity with
supplied
FDA*
See "Accessories"
Aseptic HE2 Sealing ring, Max. 25 bar

DN 50 66.5 installed on site Max. 140 °C
DIN 11864-1
In conformity with
Form A
FDA*
for pipe DIN 11850
with thread adapter nut
DRD PE2 66.5

Welding flange with Max. 40 bar
With clamped flange PTFE flat seal Max. 100 °C
(fork can be
positioned) Max. 25 bar
52002041
In conformity with
FDA*
See "Accessories"
(or installed on site)
SMS UE2 Sealing ring, Max. 25 bar

66.5
2" installed on site Max. 140 °C
(DN 51)
In conformity with
with thread adapter nut
FDA*
Varivent WE2 56.5

Clamping ring and See specification as per
for piping O-ring seal, Tuchenhagen VARIVENT-
≥ DN 65 installed on site Inline housing, however:
≥ O.D. 3"
In conformity with
≥ I.P.S. 3" Max. 25 bar
ø68
FDA*
Max. 150 °C
Ingold fitting TT2 In conformity with Max. 10 bar

FDA* Max. 150 °C
DN 25 (USP Class VI)
Fitting length 46 mm
51,5
Thread adapter nut
G1¼
With EPDM O-ring seal

* FDA-compliant material in accordance with 21 CFR Part 177.1550/2600
32 Endress+Hauser
Sensor length L for FTL51 and FTL51H,

depending on process connection
Thread: G¾ Thread: NPT ¾ Flanges and

G1 NPT1 flange-like process connections
R¾
R1
L
L
ø21.5
L00-FTL5xxxx-06-05-xx-xx-017 L00-FTL5xxxx-06-05-xx-xx-018
From seal surface of From lower edge of

thread adapter thread
Any length L:
148 mm to 3000 mm (6 to 115 in); special version (TSP) on request up to 6000 mm (235 in)
! Note!
Special length "L II":
With vertical mounting from above the same switchpoint as for the Liquiphant II
FTL360, FTL365, FDL30, FDL35
"L II" depends on process connection:

L = 115 mm for flanges and flange-like process connections
L = 99 mm for threads NPT and R (BSPT)
L = 118 mm for threads G1 (BSP 1)
L = 115 mm for threads G ¾ (BSP ¾)
L = 104 mm for flush-mounted 1" (Endress+Hauser)
Weights See "Product structure"
Material Material specifications as per AISI and DIN-EN.
Parts in contact with process

• Process connection and extension pipe: 316L (1.4435) optionally 2.4610 (AlloyC4), 2.4602 (AlloyC22)
• Tuning fork: 316L (1.4435) optionally 2.4610 (AlloyC4), 2.4602 (AlloyC22)
• With a surface roughness quality Ra < 0.38 μm (electropolished), the wetted parts are made of 316L
(1.4435) in accordance with BN2 (delta ferrite content < 1 %)
• Flanges: 316L (1.4435 or 1.4404)
• Flange plating: AlloyC4, AlloyC22
• Flat seal for process connection G ¾ or G 1: elastomer fiber, asbestos-free
Parts with no process contact

• Tuning fork/housing seal: EPDM
• Temperature spacer: 316 L (1.4435)
• Pressure tight feed through: 316L (1.4435)
• Grounding at housing (outside): 304 (1.4301)
• Nameplate at housing (outside): 304 (1.4301)
• Cable glands
– Housing F13, F15, F16, F17: polyamide (PA)
With B or C approval (→ ä 41 ordering information): nickel-plated brass
– Housing F27: 316L
Endress+Hauser 33
– Housing T13: nickel-plated brass

• Polyester housing F16: PBT-FR with PBT-FR cover or with PA12 transparent cover
– Cover seal: EPDM
– Nameplate glued: polyester film (PET)
– Pressure compensation filter: PBT-GF20
• Stainless steel housing F15: 316L (1.4404)
– Cover seal: silicone
– Safety claw: 304 (1.4301)
– Pressure equalizing filter: PBT-GF20, PA
• Aluminum housing F17/F13: EN-AC-AlSi10Mg, plastic-coated
– Safety claw: nickel-plated brass
– Pressure compensation filter: silicone
• Stainless steel housing F27: 316L (1.4435)
– Cover seal: FVMQ (optional: EPDM seal available as spare part)
– Safety claw: 316L (1.4435)
• Aluminum housing T13: EN-AC-AlSi10Mg, plastic-coated
– Safety claw: nickel-plated brass
• Compact housing (valve connector or M12 connector): 316L (1.4435)
Process connections • Parallel thread G ¾, G 1 to DIN ISO 228/I with flat seal to DIN 7603
• Tapered thread R ¾, R 1 to EN10226
• Tapered thread ¾ -14 NPT, 1 - 11½ NPT to ANSI B 1.20.1
• Flush-mounted installation with welding neck to factory standard Endress+Hauser (G ¾, G 1)
• Flush-mounted installation with welding neck to factory standard Endress+Hauser (1"),
sensor can be positioned
• Tri-Clamp 1½", 2" to ISO 2852
• Threaded pipe joint DN 32, 40, 50 to DIN 11851
• Aseptic connection DN 50 to DIN 11864-1 Form A for pipe DIN 11850
• SMS connection 2" (DN 51)
• DRD flange
• Varivent® DN 50 (50/40) to factory standard Tuchenhagen
• Flanges to EN/DIN from DN 25, for standards see "Product structure," to ANSI B 16.5 from 1",
to JIS B2220 (RF)
• Ingold DN25 fitting length 46 mm with thread adapter nut G1 ¼
34 Endress+Hauser
Human interface
Electronic inserts With FEL51, FEL52, FEL54, FEL55:
• 2 switches for safety mode and density change,
FEL51
• green LED to indicate operational status, L1 N U~
19...253V AC
• red LED to indicate the switching status, 50/60Hz
1 Max >0,7
flashes in the event of corrosion damage on sensor 2
or if the electronics are defective Min >0,5
I max : 350mA
With FEL56: 1 2

• green LED flashes to indicate operational status, Connecting terminal LEDs Switches
• red LED to indicate the switching status,
flashes in the event of corrosion damage on sensor L00-FTL5xxxx-03-05-xx-en-001
or if the electronics are defective

With FEL57:
• 2 switches for density change and
cyclical checking,
• green LED to indicate operational status,
• yellow LED to indicate the covered status,
flashes in the event of corrosion damage on sensor
With FEL58:
• green LED
– flashes quickly to indicate operational status,
– flashes slowly in the event of corrosion damage on sensor
or if the electronics are defective,
• yellow LED to indicate the switching status,
Test key – breaks the cable connection L00-FTL5xxxx-03-05-xx-xx-013
With FEL50A:
• 8 switches for configuring the device address
FEL50A
• green LED to indicate operational status, Address
pulsing to indicate communication; ON SW

OFF HW
PA– PA+
• yellow LED to indicate the switching status, 1 2 3 4 5 6 7 8
flashes in the event of corrosion damage on sensor

1 2
Connecting terminal LEDs Switches
With FEL50D:
• yellow LED: to indicate the validation of the measurement
• green LED: to indicate the operational status
FEL50D
• red LED: to indicate faults
Impuls
– +
YE
GN RD
TI328Fxx004
Compact housing Function test with test magnet
Versions AC, DC-PNP and NAMUR:

During the test, the current state of the electronic switch is reversed.
Endress+Hauser 35
Performing the test

Hold the test magnet against the marking on the nameplate:
The switching status is changed.
Light signals
Versions AC and DC-PNP with valve connector or cable tail
AC/DC NAMUR
rd ye
gn gn
Green light (gn) lights up (AC/DC):

Liquiphant M is connected to the power supply and is operational.
Green light (gn) flashing (NAMUR):

Red light (rd) lights up (AC/DC):

MAX application mode (overfill protection): sensor is immersed in liquid.
MIN application mode (dry running protection): sensor is not immersed in liquid.
Yellow light (ye) lights up (NAMUR):

MAX application mode (overfill protection): sensor is not immersed in liquid.
MIN application mode (dry running protection): sensor is immersed in liquid.
Red light (rd) flashing (AC/DC):

Liquiphant M has detected a fault.
36 Endress+Hauser
Version NAMUR and DC-PNP with M12x1 round connector 316L
ye rd
gn
Green light (gn) lights up (DC-PNP):

Green light (gn) flashing with 1 Hz (NAMUR):

Yellow light (ye) lights up (DC-PNP):

Sensor is immersed in liquid.
Yellow light (ye) lights up (NAMUR):

Red light (rd) flashing (DC-PNP):

Green light (gn) flashing with 0.3 Hz (NAMUR):

Version DC-PNP with M12x1 round connector 316L
ye 1
ye 2 gn
Endress+Hauser 37
Green light (gn) lights up:

Yellow light (ye 1) lights up:

MIN application mode (dry running protection): sensor is not immersed in liquid.
Yellow light (ye 2) lights up:

MAX application mode (overfill protection): sensor is immersed in liquid.
Green light (gn) lights up, both yellow lights (ye 1+2) do not light up:
Operating concept Onsite configuration
38 Endress+Hauser
Certificates and approvals

General approvals The following approvals are available for Liquiphant M FTL50(H), FTL51(H):
• EHEDG: certification (from TNO, The Netherlands), Report No. V99.394:
• 3A: 3A Certificate (USA), Authorization No. 459
• Certificate of Compliance as per ASME BPE-2007. For further information, please refer to SD310F.
(Order code: additional option = B)
Process connections Order code ASME BPE

+ +
CoC
Ra (μm)
< 0.38 < 1.5
Flush-mounted G ¾, G1 (with welding neck) GQ2, GW2 X X - X
Tri-Clamp 2" (special seal from Hyjoin Limited, UK) TE2 X X X X
Threaded pipe joint MA2, MC2, ME2 X X X X
Flush-mounted (can be positioned) EE2 X X X X
Aseptic HE2 X X X X
DRD PE2 X - - X
SMS UE2 X X X X
®
Varivent WE2 X X X X
Ingold TT2 X - X -
! Note!
• For CIP (Clean in Place) and SIP (Sterilize in Place) processes the pressure and temperature specifications of
the process connections must be observed.
• Suitable fittings and seals must be used to ensure hygiene-compliant design according to 3A, EHEDG,
ASME BPE etc.
• Surface Ra < 0.38 μm (< 15 μin) electropolished; surface Ra < 1.5 μm (59 μin) mechanically polished.
# Warning!
To avoid risk of contamination, install according to the "Hygienic Equipment Design Criteria (HDC)" as stated
in the Subgroup Design Principles of the EHEDG, Doc. 8, July 1993.
The flow of liquid during cleaning is important and should be in compliance with the HDC.
CRN approval Versions with a CRN approval (Canadian Registration Number) are marked with a "*" in ordering information
feature 20 "process connection" (see Page 41 ff.). CRN-approved devices are fitted with a separate plate bearing
the registration number 0F10525.5C.
Other certificates • Leak-detection system in conjunction with WHG approval

Approval number: Z–65.40–446
(See also "Ordering information" → ä 41)
• TSE Certificate of Suitability
The following applies to wetted device components:
– They do not contain any materials derived from animals.
– No additives or operating materials derived from animals are used in production or processing.
! Note!
Wetted device components are listed in the "Mechanical construction“ (see Page 27 ff.) and "Ordering
information" (see Page 41 ff.) sections.
Combinations Based on the various certificates, permissible combinations of housings * ) and electronic inserts are given in
of housings and the following table.
electronic inserts *) Abbreviations: Polyester = PBT, Stainless steel 316L = St., Aluminum = Alu
Aluminum housing with separate connection compartment = Alu/sep
Endress+Hauser 39
Certificate, applications Housing Electronic inserts
A Without any special certificate PBT, St., Alu, Alu/sep. FEL51/52/54,

(for non-hazardous area) FEL55/56/57/58/50A/50D
D Overfill protection to WHG (Germany) PBT, St., Alu, Alu/sep. FEL51/52/54,

FEL55/56/57/58/50A
B ATEX II 3G EEx nC IIC T6, WHG PBT, St., Alu, Alu/sep. FEL54
ATEX II 3G EEx nC IIC T6, WHG St., Alu, Alu/sep. FEL54

ATEX II 3D T85°C, WHG
C ATEX II 3G EEx nA II T6, WHG PBT, St., Alu, Alu/sep. FEL51/52,
FEL55/56/57/58/50A/
50D***
ATEX II 3G EEx nA II T6, WHG St., Alu, Alu/sep. FEL51/52,
ATEX II 3D T85°C, WHG FEL55/56/57/58/50A/
50D***
E ATEX II 1/2 G, EEx de, WHG Alu/sep. FEL51/52/54,

FEL55/56/57/58/50A/50D
F ATEX II 1/2 G, EEx ia IIC T6, WHG PBT, St., Alu, Alu/sep. FEL55/56/57/58/50A/50D
ATEX II 1/2 G, EEx ia IIC T6, WHG St., Alu, Alu/sep. FEL55/56/57/58/50A/50D
ATEX II 1/2 D, T80°C
G ATEX II 1/2 G, EEx ia IIC T6 PBT, St., Alu, Alu/sep. FEL55/56/57/58/50A/50D
ATEX II 1/2 G, EEx ia IIC T6 St., Alu, Alu/sep. FEL55/56/57/58/50A/50D

ATEX II 1/2 D, T80°C
H ATEX II 1G, EEx ia IIC T6 FEL55/56/57/58/50A/50D
J ATEX II 1G, EEx ia IIC T6, WHG FEL55/56/57/58/50A
I ATEX II 1/2 G, EEx de Alu/sep. FEL51/52/54,

FEL55/56/57/58/50A/50D
K ATEX II 1/2 G, EEx d IIC T6 Alu FEL51/52/54,

FEL55/56/57/58/50A/50D
L ATEX II 1/2 G, EEx d IIC T6, WHG Alu FEL51/52/54,

FEL55/56/57/58/50A/50D
P FM, IS, Cl. I, II, III, Div. 1, Gr. A–G PBT, St., Alu, Alu/sep. FEL55/56/57/58/50D
with NPT cable entry FEL50A
Q FM, XP, Cl. I, II, III, Div. 1, Gr. A–G Alu FEL51/52/54
with NPT cable entry FEL55/56/57/58/50D/50A
R FM, NI, Cl. I, Div. 2, Gr. A–D St., Alu, Alu/sep. FEL51/52/54,
with NPT cable entry FEL55/56/57/58/50D
PBT FEL55/56/57/58/50D/50A
with NPT cable entry
U CSA, General Purpose St., Alu, Alu/sep. FEL51/52/54,

PBT FEL51/52,
S CSA, IS, Cl. I, II, III, Div. 1, Gr. A–G PBT, St., Alu, Alu/sep. FEL55/56/57/58/50D/50A
with NPT cable entry
T CSA, XP, Cl. I, II, III, Div. 1, Gr. A–G Alu FEL51/52/54,
V TIIS Ex ia IIC T3 PBT, St., Alu FEL57/50D***
W TIIS Ex d IIB T3 Alu FEL52/54/50D***

Y Other certificate PBT, St., Alu, Alu/sep. FEL51/52/54,
(for non-hazardous area) FEL55/56/57/58/50A/50D
*** In preparation!
40 Endress+Hauser
! Note!
With polyester housing (PBT), electric connecting cables run in pipes:
Do not screw cable entries firmly to the piping. Use flexible connections (e.g. with armored hose).
If piping is used for grounding, then ensure that there is a continuous electrical connection.
! Note!
Despite the additional dust ignition-proof certificates, the FTL5x(H) is to be used as a liquid point level switch
only.
Ordering information
! Note!
Versions that are mutually exclusive are not indicated in this list.
Liquiphant M Design Basic weight

FTL50 FTL50 Compact 0.6 kg
FTL51 product structure FTL51 With extension pipe 0.6 kg
10 Approval:
A Non-hazardous area
B ATEX/NEPSI II 3 G/ EEx nC II T6 Overfill protection to WHG (Germany)
ATEX/NEPSI II 3 D T 85 °C*
C ATEX/NEPSI II 3 G EEx nA II T6 Overfill protection to WHG (Germany)
ATEX /NEPSI II 3 D T 85 °C*
D Non-hazardous area Overfill protection to WHG (Germany)
E ATEX II 1/2 G EEx de IIC T6 Overfill protection to WHG (Germany)
F ATEX II 1/2 G EEx ia IIC T6 Overfill protection to WHG (Germany)
ATEX II 1/2 D T 80 °C*
G ATEX II 1/2 G EEx ia IIC T6
H ATEX II 1 G EEx ia IIC T6
I ATEX II 1/2 G EEx de IIC T6
J ATEX II 1 G EEx ia IIC T6 Overfill protection to WHG (Germany)
K ATEX II 1/2 G EEx d IIC T6
L ATEX II 1/2 G EEx d IIC T6 Overfill protection to WHG (Germany)
M NEPSI Ex ia IIC T6
N NEPSI Ex d IIC T6
P FM IS, Class I, II, III Division 1, Group A–G
Q FM XP, Class I, II, III Division 1, Group B–G, for E5 housing Group A–G
R FM NI, Class I Division 2, Group A–D
S CSA IS, Class I, II, III Division 1, Group A–G
T CSA XP, Class I, II, III Division 1, Group A–G
U CSA General Purpose
V TIIS Ex ia IIC T3
W TIIS Ex d IIB T3
X TIIS Ex ia IIC T6
7 TIIS Ex d IIC T3
8 TIIS Ex d IIC T6
Y Special version
*) Not for PBT
20 Process connection: Additional

weight
Note!
For a process pressure of 100 bar, please select the appropriate option under "Additional options"
GQ2 G¾ 316L Thread ISO 228
Installation > accessories: welding neck
GQ5 G¾ Alloy C4 Thread ISO 228
GQ6** G¾ AlloyC22 Thread ISO 228
GR2 G1 316L Thread ISO 228 0.2 kg
GR5 G1 Alloy C4 Thread ISO 228 0.2 kg
GR6** G1 AlloyC22 Thread ISO 228 0.2 kg
GW2* G1 316L Thread ISO 228 0.2 kg
Endress+Hauser 41

weight
GM2* NPT ¾ 316L Thread ANSI
GM5* NPT ¾ Alloy C4 Thread ANSI
GM6** NPT ¾ AlloyC22 Thread ANSI
GN2* NPT1 316L Thread ANSI 0.2 kg
GN5* NPT1 Alloy C4 Thread ANSI 0.2 kg
GN6** NPT1 AlloyC22 Thread ANSI 0.2 kg
GE2 R¾ 316L Thread EN10226
GE5 R¾ Alloy C4 Thread EN10226
GE6** R¾ AlloyC22 Thread EN10226
GF2 R1 316L Thread EN10226 0.2 kg
GF5 R1 Alloy C4 Thread EN10226 0.2 kg
GF6** R1 AlloyC22 Thread EN10226 0.2 kg
BA2 DN32 PN6 A 316L Flange EN 1092-1 1.2 kg

(DIN 2527 B)
BB2 DN32 PN25/40 A 316L Flange EN 1092-1 2.0 kg
(DIN 2527 B)
BC2 DN40 PN6 A 316L Flange EN 1092-1 1.4 kg
(DIN 2527 B)
BD2 DN40 PN25/40 A 316L Flange EN 1092-1 2.4 kg
(DIN 2527 B)
BE2 DN50 PN6 A 316L Flange EN 1092-1 1.6 kg
(DIN 2527 B)
BG2 DN50 PN25/40 A 316L Flange EN 1092-1 3.2 kg
(DIN 2527 B)
BH2 DN65 PN6 A 316L Flange EN 1092-1 2.4 kg
(DIN 2527 B)
BJ2 DN50 PN100 A 316L (FTL51) Flange EN 1092-1
(DIN 2527 B)
BK2 DN65 PN25/40 A 316L Flange EN 1092-1 4.3 kg
(DIN 2527 B)
BM2 DN80 PN10/16 A 316L Flange EN 1092-1 4.8 kg
(DIN 2527 B)
BN2 DN80 PN25/40 A 316L Flange EN 1092-1 5.9 kg
(DIN 2527 B)
BQ2 DN100 PN10/16 A 316L Flange EN 1092-1 5.6 kg
(DIN 2527 B)
BR2 DN100 PN25/40 A 316L Flange EN 1092-1 7.5 kg
(DIN 2527 B)
B12 DN80 PN100 A 316L (FTL51) Flange EN 1092-1
(DIN 2527 B)
B82 DN25 PN25/40 A 316L Flange EN 1092-1 1.4 kg
(DIN 2527 B)
CA2 DN32 PN6 B1 316L Flange EN 1092-1 1.1 kg
(DIN 2527 C)
CA5 DN32 PN6 Alloy C4 >316L Flange EN 1092-1 1.1 kg
(DIN 2527)
CA6** DN32 PN6 B1 AlloyC22 >316L Flange EN 1092-1 1.1 kg
(DIN 2527)
CE2 DN50 PN6 B1 316L Flange EN 1092-1 1.5 kg
(DIN 2527 C)
CE5 DN50 PN6 Alloy C4 >316L Flange EN 1092-1 1.5 kg
(DIN 2527)
CE6** DN50 PN6 B1 AlloyC22 >316L Flange EN 1092-1 1.5 kg
(DIN 2527)
CG2 DN50 PN25/40 B1 316L Flange EN 1092-1 2.9 kg
(DIN 2527 C)
CG5 DN50 PN25/40 Alloy C4 >316L Flange EN 1092-1 2.9 kg
(DIN 2527)
CG6** DN50 PN25/40 B1 AlloyC22 >316L Flange EN 1092-1 2.9 kg
(DIN 2527)
CJ2 DN50 PN100 B2 316L (FTL51) Flange EN 1092-1
(DIN 2527)
CN2 DN80 PN25/40 B1 316L Flange EN 1092-1 5.2 kg
(DIN 2527 C)
CN5 DN80 PN25/40 Alloy C4 >316L Flange EN 1092-1 5.2 kg
(DIN 2527)
CN6** DN80 PN25/40 B1 AlloyC22 >316L Flange EN 1092-1 5.2 kg
(DIN 2527)
CQ2 DN100 PN10/16 B1 316L Flange EN 1092-1 5.3 kg
(DIN 2527 C)
CQ5 DN100 PN10/16 Alloy C4 >316L Flange EN 1092-1 5.3 kg
(DIN 2527)
42 Endress+Hauser

weight
CQ6** DN100 PN10/16 B1 AlloyC22 >316L Flange EN 1092-1 5.3 kg
(DIN 2527)
C12 DN80 PN25/40 B1 316L (FTL51) Flange EN 1092-1
(DIN 2527)
C82 DN25 PN25/40 B1 316L Flange EN 1092-1 1.3 kg
(DIN 2527 C)
C85 DN25 PN25/40 Alloy C4 >316L Flange EN 1092-1 1.3 kg
(DIN 2527)
C86** DN25 PN25/40 B1 AlloyC22 >316L Flange EN 1092-1 1.3 kg
(DIN 2527)
DG2 DN50 PN40 B1 316L Flange EN 1092-1
(DIN 2526 D)
DN2 DN80 PN40 B1 316L Flange EN 1092-1
(DIN 2526 D)
D82 DN25 PN40 B1 316L Flange EN 1092-1
(DIN 2526 D)
FG2 DN50 PN40 C 316L Flange EN 1092-1 2.6 kg
(DIN 2512 F)
NG2 DN50 PN40 D 316L Flange EN 1092-1 2.9 kg
(DIN 2512 N)
AA2* 1¼" 150 lbs RF 316/316L Flange ANSI B16.5 1.2 kg
AB2* 1¼" 300 lbs RF 316/316L (FTL51) Flange ANSI B16.5 2.0 kg
AC2* 1½" 150 lbs RF 316/316L Flange ANSI B16.5 1.5 kg
AD2* 1½" 300 lbs RF 316/316L (FTL51) Flange ANSI B16.5 2.7 kg
AE2* 2" 150 lbs RF 316/316L Flange ANSI B16.5 2.4 kg
AE5* 2" 150 lbs RF Alloy C4 >316/316L Flange ANSI B16.5 2.4 kg
AE6** 2" 150 lbs RF AlloyC22 >316/316L Flange ANSI B16.5 2.4 kg
AF2* 2" 300 lbs RF 316/316L Flange ANSI B16.5 3.2 kg
AG2* 2" 600 lbs RF 316/316L (FTL51) Flange ANSI B16.5 4.2 kg
AJ2* 2½" 300 lbs RF 316/316L (FTL51) Flange ANSI B16.5 4.8 kg
AL2* 3" 150 lbs RF 316/316L Flange ANSI B16.5 4.9 kg
AM2* 3" 300 lbs RF 316/316L (FTL51) Flange ANSI B16.5 6.8 kg
AM6** 3" 300 lbs RF AlloyC22 >316/316L Flange ANSI B16.5 6.8 kg
AN2* 3" 600 lbs RF 316/316L (FTL51) Flange ANSI B16.5
AP2* 4" 150 lbs RF 316/316L Flange ANSI B16.5 7.0 kg
AQ2* 4" 300 lbs RF 316/316L (FTL51) Flange ANSI B16.5 11.5 kg
AQ6** 4" 300 lbs RF AlloyC22 >316/316L Flange ANSI B16.5 11.5 kg
AR2* 4" 600 lbs RF 316/316L (FTL51) Flange ANSI B16.5 17.3 kg
A82* 1" 150 lbs RF 316/316L Flange ANSI B16.5 1.0 kg
KA2 10 K 25 RF 316L Flange JIS B2220
KC2 10 K 40 RF 316L Flange JIS B2220
KE2 10 K 50 RF 316L Flange JIS B2220 1.7 kg
KE5 10 K 50 RF Alloy C4 >316L Flange JIS B2220 1.7 kg
KE6** 10 K 50 RF AlloyC22 >316L Flange JIS B2220 1.7 kg
KL2 10 K 80 RF 316L Flange JIS B2220
KP2 10 K 100 RF 316L Flange JIS B2220
TC2* DN25-38 (1 to 1½") 316L ISO 2852 Tri-Clamp
TE2* DN40-51 (2") 316L ISO 2852 Tri-Clamp 0.1 kg
YY9 Special version
* With CRN approval.

** AlloyC22 in preparation
30 Probe length; Type:

FTL50
AA Compact; Ra <3.2 μm/80 grit
IA Compact; Temperature spacer 0.6 kg
QA Compact; Pressure tight feed through 0.7 kg
FTL51
BB ....... mm; 316L** Ra <3.2 μm/80 grit
BE ....... mm; Alloy** Ra <3.2 μm/80 grit
CB ....... inch; 316L** Ra <3.2 μm/80 grit
CE ....... inch; Alloy** Ra <3.2 μm/80 grit 2.3 kg/100 in
DB Length: type II*; 316L Ra <3.2 μm/80 grit 0.1 kg
DE Length: type II*; Alloy Ra <3.2 μm/80 grit 0.1 kg
JB ....... mm; 316L** + Temperature spacer 0.9 kg/m
+0.6 kg
JE ....... mm; Alloy** + Temperature spacer 0.9 kg/m
+0.6 kg
Endress+Hauser 43

KB ....... inch; 316L** + Temperature spacer 2.3 kg/100 in
+0.6 kg
KE ....... inch; Alloy** + Temperature spacer 2.3 kg/100 in
+0.6 kg
LB Length: type II*; 316L + Temperature spacer 0.1 kg
+0.6 kg
LE Length: type II*; Alloy + Temperature spacer 0.1 kg
+0.6 kg
RB ....... mm; 316L** + Pressure tight feed through 0.9 kg/m
+0.7 kg
RE ....... mm; Alloy** + Pressure tight feed through 0.9 kg/m
+0.7 kg
SB ....... inch; 316L** + Pressure tight feed through 2.3 kg/100 in
+0.7 kg
SE ....... inch; Alloy** + Pressure tight feed through 2.3 kg/100 in
+0.7 kg
TB Length: type II*; 316L + Pressure tight feed through 0.1 kg
+0.7 kg
TE Length: type II*; Alloy + Pressure tight feed through 0.1 kg
+0.7 kg
YY Special version
*) Replacing devices: when vertically mounting a Liquiphant M

FTL51 with length II, the switch point is at the same height as for
a Liquiphant II FTL360, FTL365, FDL30, FDL35.
See also → ä 33, "L II" depends on process connection.
**) Order 3001 to 6000 mm (116 to 235 in) via yy
40 Electronics; output:
A FEL50A PROFIBUS PA
D FEL50D Density/concentration
1 FEL51* 2-wire, 19 to 253 V AC
2 FEL52* 3-wire PNP, 10 to 55 V DC
4 FEL54 Relay DPDT, 19 to 253 V AC, 19 to 55 V DC
5 FEL55 8/16 mA, 11 to 36 V DC
6 FEL56 NAMUR (L-H signal)
7 FEL57 2-wire PFM
8 FEL58* NAMUR + test keys (H-L signal)
9 Special version
*) Also available in compact housing
50 Housing; cable entry:

C3 Compact 316L IP66/68; Cable 5 m
D3 Compact 316L IP65; Plug Pg11 ISO4400
E1* F27 316L NEMA6P; Thread NPT ¾
E3 Compact 316L NEMA4X; Plug NPT ½ ISO4400
N3 Compact 316L IP66/68; M12 connector
E4 F16 Polyester NEMA4X; Thread NPT ½
E5 F13/F17 Alu NEMA4X; Thread NPT ¾ 0.5 kg
E6 F15 316L NEMA4X; Thread NPT ½ 0.1 kg
E7 T13 Alu IP66; Thread NPT ¾ 0.9 kg
Separate connection compartment
F1* F27 316L IP68 Thread G1/2
F4 F16 Polyester IP66; Thread G ½
F5 F13/F17 Alu IP66; Thread G ½ 0.5 kg
F6 F15 316L IP66; Thread G ½ 0.1 kg
F7 T13 Alu coated, IP66; Thread G ½ 0.9 kg
G1* F27 316L IP68; M20 threaded joint
G4 F16 Polyester IP66; M20 threaded joint
G5 F13/F17 Alu IP66; M20 threaded joint 0.5 kg
(EEx d > M20 thread)
G6 F15 316L IP66; M20 threaded joint 0.1 kg
G7 T13 Alu coated, IP66; M20 threaded joint 0.9 kg
Separate connection compartment (EEx d > M20 thread)
N4 F16 Polyester IP66; M12 connector
N5 F13/F17 Alu IP66; M12 connector
N6 F15 316L IP66; M12 connector
Y9 Special version
* F27 housing in preparation.
44 Endress+Hauser
60 Additional options
A Basic version
B Cleaned for silicone-free service, max 2000mm
C EN 10204 - 3.1 material (316L wetted) inspection certificate
K Special adjustment, density H20
L Special adjustment, density H20, EN10204-3.1
N EN 10204 - 3.1 material, NACE MR0175 (316L wetted)
Inspection certificate
P 100 bar process pressure (FTL51)
R 100 bar process pressure, EN 10204 - 3.1 material,
NACE MR0175 (316L wetted) (FTL51)
S GL/ABS marine approval (FTL51: max. 1600 mm)
Y Special version
FTL5# - Complete product designation
! Note!
The basic weight includes the compact sensor, thread adapter G ¾, electronic insert,
polyester housing
Endress+Hauser 45
Liquiphant M Design Basic weight

FTL50H FTL50H Compact 0.7 kg
FTL51H product structure FTL51H With extension pipe 0.7 kg
10 Approval:
A Non-hazardous area
B ATEX/NEPSI II 3 G EEx nC II T6 Overfill protection to WHG (Germany)
C ATEX/NEPSI II 3 G EEx nA II T6 Overfill protection to WHG (Germany)
D Non-hazardous area Overfill protection to WHG (Germany)
E ATEX II 1/2 G EEx de IIC T6 Overfill protection to WHG (Germany)
F ATEX II 1/2 G EEx ia IIC T6 Overfill protection to WHG (Germany)
G ATEX II 1/2 G EEx ia IIC T6
H ATEX II 1 G EEx ia IIC T6
I ATEX II 1/2 G EEx de IIC T6
J ATEX II 1 G EEx ia IIC T6 Overfill protection to WHG (Germany)
K ATEX II 1/2 G EEx d IIC T6
L ATEX II 1/2 G EEx d IIC T6 Overfill protection to WHG (Germany)
M NEPSI Ex ia IIC T6
N NEPSI Ex d IIC T6
P FM IS, Class I, II, III Division 1, Group A–G
Q FM XP, Class I, II, III Division 1, Group B–G, for E5 housing Group A–G
R FM NI, Class I Division 2, Group A–D
S CSA IS, Class I, II, III Division 1, Group A–G
T CSA XP, Class I, II, III Division 1, Group A–G
U CSA General Purpose
V TIIS Ex ia IIC T3
W TIIS Ex d IIB T3
X TIIS Ex ia IIC T6
7 TIIS Ex d IIC T3
8 TIIS Ex d IIC T6
Y Special version
*) Not for PBT

weight
GQ2 G¾ 316L (FTL50H) Thread ISO 228
GW2* G1 316L Thread ISO 228 0.2 kg
BA2 DN32 PN6 A 316L Flange EN 1092-1 1.2 kg
(DIN 2527 B)
BB2 DN32 PN25/40 A 316L Flange EN 1092-1 2.0 kg
(DIN 2527 B)
BC2 DN40 PN6 A 316L Flange EN 1092-1 1.4 kg
(DIN 2527 B)
BD2 DN40 PN25/40 A 316L Flange EN 1092-1 2.4 kg
(DIN 2527 B)
BE2 DN50 PN6 A 316L Flange EN 1092-1 1.6 kg
(DIN 2527 B)
BG2 DN50 PN25/40 A 316L Flange EN 1092-1 3.2 kg
(DIN 2527 B)
BH2 DN65 PN6 A 316L Flange EN 1092-1 2.4 kg
(DIN 2527 B)
BK2 DN65 PN25/40 A 316L Flange EN 1092-1 4.3 kg
(DIN 2527 B)
BM2 DN80 PN10/16 A 316L Flange EN 1092-1 4.8 kg
(DIN 2527 B)
BN2 DN80 PN25/40 A 316L Flange EN 1092-1 5.9 kg
(DIN 2527 B)
BQ2 DN100 PN10/16 A 316L Flange EN 1092-1 5.6 kg
(DIN 2527 B)
BR2 DN100 PN25/40 A 316L Flange EN 1092-1 7.5 kg
(DIN 2527 B)
B82 DN25 PN25/40 A 316L Flange EN 1092-1 1.4 kg
(DIN 2527 B)
CG2 DN50 PN25/40 B1 316L Flange EN 1092-1 3.2 kg
(DIN 2527 C)
46 Endress+Hauser

weight
CN2 DN80 PN25/40 B1 316L Flange EN 1092-1 5.9 kg
(DIN 2527 C)
CQ2 DN100 PN10/16 B1 316L Flange EN 1092-1 5.6 kg
(DIN 2527 C)
EE2 1" flush-mounted (52001047) 316L 0.3 kg
HE2 DN50 Pipe DIN 11850 316L DIN 11864-1 A 0.3 kg
AA2* 1¼" 150 lbs RF 316/316L Flange ANSI B16.5 1.2 kg
AC2* 1½" 150 lbs RF 316/316L Flange ANSI B16.5 1.5 kg
AE2* 2" 150 lbs RF 316/316L Flange ANSI B16.5 2.4 kg
AF2* 2" 300 lbs RF 316/316L Flange ANSI B16.5 3.2 kg
AJ2* 2½" 300 lbs RF 316/316L (FTL51H) Flange ANSI B16.5 4.8 kg
AL2* 3" 150 lbs RF 316/316L Flange ANSI B16.5 4.9 kg
AM2 3" 300 lbs RF 316/316L (FTL51H) Flange ANSI B16.5 6.8 kg
AP2* 4" 150 lbs RF 316/316L Flange ANSI B16.5 7.0 kg
AQ2* 4" 300 lbs RF 316/316L (FTL51H) Flange ANSI B16.5 11.5 kg
A82* 1" 150 lbs RF 316/316L Flange ANSI B16.5 1.0 kg
KA2 10 K 25 RF 316L Flange JIS B2220
KC2 10 K 40 RF 316L Flange JIS B2220
KE2 10 K 50 RF 316L Flange JIS B2220 1.7 kg
KL2 10 K 80 RF 316L Flange JIS B2220
KP2 10 K 100 RF 316L Flange JIS B2220
MA2 DN32 PN25 316L DIN 11851 0.1 kg
MC2 DN40 PN25 316L DIN 11851 0.2 kg
ME2 DN50 PN25 316L DIN 11851 0.3 kg
PE2 DRD 65 mm 316L 0.3 kg
TC2* DN25-38 (1 to 1½") 316L ISO 2852 Tri-Clamp
TE2* DN40-51 (2") 316L ISO 2852 Tri-Clamp 0.1 kg
TT2** Ingold fitting 25x46mm 316L
UE2 SMS 2" PN25 316L 0.2 kg
WE2* DN65-162 PN10 316L Varivent N pipe 0.5 kg
YY9 Special version
* CRN approval
** In preparation

FTL50H
AC Compact; Ra <1.5 μm/120 grit
AD Compact; Ra <0.3 μm/320 grit / A3
IC Compact; Ra <1.5 μm/120 grit + temperature spacer 0.6 kg
ID Compact; Ra <0.3 μm/320 grit / A3 + temperature spacer 0.6 kg
QC Compact; Ra <1.5 μm/120 grit + Pressure tight feed through 0.7 kg
QD Compact; Ra <0.3 μm/320 grit / A3 + Pressure tight feed through 0.7 kg
FTL51H
BC ....... mm; Ra <1.5 μm/120 grit 0.9 kg/m
BD ....... mm; Ra <0.3 μm/320 grit / A3 0.9 kg/m
CC ....... inch; Ra <1.5 μm/120 grit 2.3 kg/100 in
CD ....... inch; Ra <0.3 μm/320 grit / A3 2.3 kg/100 in
DC Length: type II*; Ra <1.5 μm/120 grit 0.1 kg
DD Length: type II*; Ra <0.3 μm/320 grit / A3 0.1 kg
JC ....... mm; Ra <1.5 μm/120 grit 0.9 kg/m
+ Temperature spacer +0.6 kg
JD ....... mm; Ra <0.3 μm/320 grit 0.9 kg/m
KC ....... inch; Ra <1.5 μm/120 grit 2.3 kg/100 in
KD ....... inch; Ra <0.3 μm/320 grit 2.3 kg/100 in
LC Length: type II*; Ra <1.5 μm/120 grit 0.1 kg
LD Length: type II*; Ra <0.3 μm/320 grit 0.1 kg
RC ....... mm; Ra <1.5 μm/120 grit 0.9 kg/m
+ Pressure tight feed through +0.7 kg
RD ....... mm; Ra <0.3 μm/320 grit 0.9 kg/m
SC ....... inch; Ra <1.5 μm/120 grit 2.3 kg/100 in
SD ....... inch; Ra <0.3 μm/320 grit 2.3 kg/100 in
TC Length: type II*; Ra <1.5 μm/120 grit 0.1 kg
Endress+Hauser 47

TD Length: type II*; Ra <0.3 μm/320 grit 0.1 kg
YY Special version
*) Replacing devices: when vertically mounting a Liquiphant M
FTL51H with length II, the switch point is at the same height as for
a Liquiphant II FTL360, FTL365, FDL30, FDL35.
See also → ä 33, "L II" depends on process connection.
40 Electronics; output:
A FEL50A PROFIBUS PA
D FEL50D Density/concentration
1 FEL51* 2-wire, 19 to 253 V AC
2 FEL52* 3-wire PNP, 10 to 55 V DC
4 FEL54 Relay DPDT, 19 to 253 V AC, 19 to 55 V DC
5 FEL55 8/16 mA, 11 to 36 V DC
6 FEL56 NAMUR (L-H signal)
7 FEL57 2-wire PFM
8 FEL58* NAMUR + test keys (H-L signal)
9 Special version
*) Also available in compact housing
50 Housing; cable entry:

C3 Compact 316L IP66/68; Cable 5 m
D3 Compact 316L IP65; Plug Pg11 ISO 4400
E1* F27 316L NEMA6P; Thread NPT ¾
E3 Compact 316L NEMA4X; Plug NPT ½ ISO 4400
N3 Compact 316L IP66/68; M12 connector
E4 F16 Polyester NEMA4X; Thread NPT ½ –0.1 kg
E5 F13/F17 Alu NEMA4X; Thread NPT ¾ 0.4 kg
E6 F15 316L NEMA4X; Thread NPT ½
E7 T13 Alu coated, IP66; Thread NPT ¾ 0.8 kg
F1* F27 316L IP68 Thread G1/2
F4 F16 Polyester IP66; Thread G ½ –0.1 kg
F5 F13/F17 Alu IP66; Thread G ½ 0.4 kg
F6 F15 316L IP66; Thread G ½
F7 T13 Alu coated, IP66; Thread G ½ 0.8 kg
G1* F27 316L IP68; M20 threaded joint
G4 F16 Polyester IP66; M20 threaded joint –0.1 kg
G5 F13/F17 Alu IP66; M20 threaded joint 0.4 kg
(EEx d > M20 thread)
G6 F15 316L IP66; M20 threaded joint
G7 T13 Alu coated, IP66; M20 threaded joint 0.8 kg
Separate connection compartment (EEx d > M20 thread)
N4 F16 Polyester IP66; M12 connector
N5 F13/F17 Alu IP66; M12 connector
N6 F15 316L IP66; M12 connector
Y9 Special version
* F27 housing in preparation.
60 Additional options
A Basic version
B* CoC, EN 10204 - 3.1 material (316L wetted)
C EN 10204 - 3.1 material (316L wetted),
K Special adjustment, density H20
L Special adjustment, density H20, EN10204-3.1 (316L wetted) inspection certificate
S GL/ABS marine approval (FTL51H: max. 1600 mm)
Y Special version
* In preparation.
FTL5#H - Complete product designation
! Note!
Basic weight = compact sensor, thread adapter G ¾, electronic insert, stainless steel housing
48 Endress+Hauser
Accessories
! Note!
• All dimensions in mm
• For more detailed information on welding necks, please refer to TI426F/00.
• The tolerance of the defined thread start between the welding neck and sensor is ± 15°.
Welding neck Overview
a0008246 a0008251 a0008256 a0011924 a0008248 a0008253
G1
G¾, d=29 G¾, d=50 with G¾, d=55 G1, d=53 G1, d=60
can be
without flange flange with flange with flange with flange
positioned
Material 316L 316L 316L 316L 316L 316L

roughness μm (μin) 1.5 (59.1) 0.8 (31.5) 0.8 (31.5) 0.8 (31.5) 0.8 (31.5) 0.8 (31.5)
Without inspection certificate
– – 52001052 – 52001051 1) 52001221 2)
EN10204-3.1 material
With inspection certificate

52028295 52018765 52011897 71093129 1) 52011896 1) 52011898 2)
Silicone
Silicone O-ring Silicone O-ring Silicone O-ring Silicone O-ring Silicone O-ring
Seal (set of 5) profile gasket
520217173) 520217173) 520144733) 520144723) 520144723)
520144243)
Weld-in dummy – – MVT2L0692 MVT2L0691 MVT2L0691 M40167
Liquiphant M Feature Version
FTL50 GQ2
FTL5x GW2 GW2 GW2
020
FTL50H GQ2
FTL5xH GW2 GW2 GW2
1) This welding neck replaces the welding neck with the order number 917969-1000.
3) A seal is included in the delivery.
Endress+Hauser 49
a0008252 a0008245 a0008245 a0008552 a0008254
DRD DN50
RD52 Uni D85 Uni D65 M24 D65 (65 mm)
(welding flange)
Material 316L 316L 316L 316L 316L/304

roughness μm (μin), process side 0.8 (31.5) 3.2 (126) 0.8 (31.5) 0.8 (31.5) 0.8 (31.5)
Without inspection certificate 52002041/

52001047 1) 52006262 214880-0002 71041381
EN10204-3.1 material 916743-0000
With inspection certificate

52006909 1) 52010173 52010174 71041383 52011899/ –
Silicone Silicone Silicone PTFE

Seal (set of 5) profile gasket profile gasket profile gasket – flat seal
52014424 52023572 52023572 52024228
Weld-in dummy M40167 71093102 71093102 – –
Device Feature Version
Liquiphant M
FTL5xH 020 EE2 PE2
50 Endress+Hauser
G¾, d=55
with flange for Dimensions Version Order number
flush-mounted installation
26 • AISI 316L (1.4435) 52001052
• Roughness: Ra <0.8 μm
21
• AISI 316L (1.4435) with inspection certificate 52011897

Ø 55 –0.4
ISO 228
Ø 32
G¾
Silicone O-ring, ∅ 21.89 x 2.62 52014473
Material: VMQ70, FDA (set of 5)
Sensor dummy for welding in the MVT2L0692

a0008274 welding neck
• Max. 25 bar / max. 150 °C FDA-compliant material in accordance with 21 CFR Part 177.1550/2600
• Max. 40 bar / max. 100 °C Approval: 3A, EHEDG
Alternative seals ∅ 21.89 x 2.62 Order number
Material: EPDM, FDA MVT2L1148
Material: Kalrez Comp. 2035 MVT2L0666
Material: Viton MVT2L0655
Material: Viton/FEP-FEK 75 Shore MVT2L1748
Material: Silicone, VMQ23-70, FDA, 71086100

USP Class VI (set of 3)
Endress+Hauser 51
G1, d=60
with flange for flush-mounted Dimensions Version Order number
installation with sealing
surface 29.6
• AISI 316L (1.4435) 52001051
24.6

ISO 228
Ø 60 –0.4
Silicone O-ring, ∅ 28.17 x 3.53
Ø 41
52014472
G1
Material: VMQ70, FDA (set of 5)
Sensor dummy for welding in the welding neck MVT2L0691
a0008267 FDA-compliant material in accordance with 21 CFR Part 177.1550/2600

Approval: EHEDG, 3A
• Max. 25 bar / max. 150 °C
• Max. 40 bar / max. 100 °C
Alternative seals ∅ 28.17 x 3.53 Order number
Material: EPDM70, FDA MVT2L0920
Material: Viton665, FDA MVT2L0705

(set of 5)
Material: Viton971, V, FDA MVT2L1682
Material: Kalrez comp. 4079 MVT2L0567
Material: Silicone, VMQ23-70, FDA, 71086102

USP Class VI (set of 3)
G1
Sensor can be positioned Dimensions Version Order number
• AISI 316L (1.4435) 52001221

Ø 65 –0.3
26

5
Silicone profile gasket 29 x 36 x 3.7 52014424 (set of 5)

Material: SI-60, FDA
Sensor dummy for welding in the welding neck M40167
FDA-compliant material in accordance with 21 CFR Part 177.1550/2600

Approval: 3A, EHEDG
Alternative seals 29 x 36 x 3.7 Order number
Material: EPDM-60, FDA 52012805

a0008272
Material: Silicone, VMQ60, FDA, USP Class VI 71075662

• Max. 25 bar / max. 150 °C (set of 5)
• Max. 40 bar / max. 100 °C
52 Endress+Hauser
RD52
Sensor can be positioned Dimensions Version Order number
4.5 • AISI 316L (1.4435) 52001047


RD 52 x 1 6
Ø 42.3
Ø 65
Silicone profile gasket 29 x 36 x 3.7 52014424
Material: SI-60, FDA (set of 5)
• The seal can be easily replaced with
this version.
~26 Sensor dummy for welding in the welding neck M40167
a0008271
• Max. 25 bar / max. 150 °C Approval: 3A, EHEDG
• Max. 40 bar / max. 100 °C
Alternative seals 29 x 39 x 3.7 Order number
Material: EPDM-60, FDA 52012805
Material: Silicone, VMQ60, FDA, USP Class VI 71075662

(set of 5)
DRD DN50 (65 mm)

for flush-mounted installation Dimensions Version Order number
of devices with DRD flange
20 • AISI 316L (1.4435) 52002041
15 • Roughness: Ra <0.8 μm
45°

AISI 304 (1.4301) 916743-0000

Ø 84
Ø 50
Ø 125
Ø 105
Ø 66
Flat seal, 50 x 65 x 1 52024228

3 Material: PTFE, FDA (set of 5)
13
4 x 90° (= 360°)
16
4 x M10
a0008263
• Max. 25 bar / max. 150 °C

• Max. 40 bar / max. 100 °C
Endress+Hauser 53
Flange Order number: 918158-0000

With G 1 thread for mounting 2
a Liquiphant FTL50, FTL51
with process connection GR2
14
Pressure up to 40 bar
92
Material: corrosion-resistant steel
92
1.4301 (AISI 304)
Weight: 0.54 kg
G1 12
Flange With G 1 thread for mounting

a Liquiphant FTL50, FTL51
with process connection GR2
1.4571 (AISI 316Ti)
– Order number: 918143-0000
Flange DN50 PN40, EN 1092-1
Weight: 3.11 kg L00-FTL5xxxx-03-05-xx-xx-015

Flange ANSI 2", 150 psi, RF
Weight: 2.38 kg
Sliding sleeves for For continuous adjustment of the switch

FTL51
unpressurized operation point of a Liquiphant M FTL51 41 AF
19

1.4435 (AISI 316 L)
18
M6 (3x)
Weight for G 1, NPT 1: 0.21 kg
Weight for G 1½, NPT 1½: 0.54 kg G1A
(1 NPT)
55 AF
19
pe =
0 bar
22
M6 (3x)
G 1½ A
(1½ NPT)
Thread Standard Material Order number Approval

G1 DIN ISO 228/I 1.4435 (AISI 316 L) 52003978
G1 DIN ISO 228/I 1.4435 (AISI 316 L) 52011888 3.1 inspection certificate
EN 10204 - 3.1 material
NPT1 ANSI B 1.20.1 1.4435 (AISI 316 L) 52003979
NPT1 ANSI B 1.20.1 1.4435 (AISI 316 L) 52011889 3.1 inspection certificate
G 1½ DIN ISO 228/I 1.4435 (AISI 316 L) 52003980
G 1½ DIN ISO 228/I 1.4435 (AISI 316 L) 52011890 3.1 inspection certificate
NPT1½ ANSI B 1.20.1 1.4435 (AISI 316 L) 52003981
54 Endress+Hauser
NPT1½ ANSI B 1.20.1 1.4435 (AISI 316 L) 52011891 3.1 inspection certificate
High pressure sliding sleeves For continuous adjustment of the

switch point of a Liquiphant M FTL51.
Also for use in hazardous areas.
For further information → ä 59ff. ø60 FTL51
~70
(ATEX, NEPSI).
Material: corrosion-resistant steel 50 AF
1.4435 (AISI 316L) or AlloyC4
Weight for G 1, NPT 1: 1.13 kg
18
2
Weight for G 1½, NPT 1½: 1.32 kg
G1A
Seal package made of graphite (1 NPT)
ø60
~72
50 AF
22
G 1½ A
(1½ NPT)
G1 DIN ISO 228/1 1.4435 (AISI 316 L) 52003663

G1 DIN ISO 228/1 1.4435 (AISI 316 L) 52011880 3.1 inspection certificate
G1 DIN ISO 228/1 Alloy C4 52003664

G1 DIN ISO 228/1 AlloyC22 *
NPT1 ANSI B 1.20.1 1.4435 (AISI 316 L) 52003667
NPT1 ANSI B 1.20.1 1.4435 (AISI 316 L) 52011881 3.1 inspection certificate
NPT1 ANSI B 1.20.1 Alloy C4 52003668
NPT1 ANSI B 1.20.1 AlloyC22 *

G 1½ DIN ISO 228/1 1.4435 (AISI 316 L) 52003665
G 1½ DIN ISO 228/1 1.4435 (AISI 316 L) 52011882 3.1 inspection certificate
G 1½ DIN ISO 228/1 Alloy C4 52003666
G 1½ DIN ISO 228/1 AlloyC22 *
NPT1½ ANSI B 1.20.1 1.4435 (AISI 316 L) 52003669
NPT1½ ANSI B 1.20.1 1.4435 (AISI 316 L) 52011883 3.1 inspection certificate
NPT1½ ANSI B 1.20.1 Alloy C4 52003670
NPT1½ ANSI B 1.20.1 AlloyC22 *
* AlloyC22 in preparation.
Endress+Hauser 55
pe
bar
(psi) Liquiphant M FTL51*
100 Liquiphant S
(1450)
80
(1160)
64
(928)
Liquiphant M
Tp
°C
–60 –50 –1 0 150 230 280 (°F)
(–76) (–58) (–14.5) (32) (300) (440) (540)
* FTL51 with high-pressure sliding sleeve (100 bar). See "Additional fitting" → ä 41 option "P" or "R".l
Transparent cover Order number: 943461-0001

for polyester housing F16
Material: PA 12
Weight: 0.04 kg
Cover For stainless steel housing F15

with sight glass
Material: AISI 316L
Weight: 0.16 kg
With glass sight glass
– Order number: 52001403
With PC sight glass L00-FTL5xxxx-03-05-xx-xx-017
(Not for CSA, General Purpose)
Circular connector Order number: 52010285

4x0.34 M12 socket
Cable: PVC (gray) 5 m
27.5
Body: PUR (blue)

Thread adapter nut: Cu Sn/Ni min. 40
Degree of protection: IP67
L00-FTL20Hxx-07-05-xx-xx-004
Temperature range: –25 to +70 °C
Order number: 52024216

4x0.34 M12 socket
Cable: PVC (orange) 5 m
27.5
Body: PVC (orange)

Thread adapter nut: 316L min. 40
Degree of protection: IP69K (fully locked)
L00-FTL20Hxx-07-05-xx-xx-005
56 Endress+Hauser
Order number: 52018763

4x0.34 M12 socket with integrated LEDs
Cable: PVC (orange) 5 m
27.5
Body: PVC (transparent)
Thread adapter nut: 316L min. 40
Degree of protection: IP69K (fully locked)
L00-FTL20Hxx-07-05-xx-xx-005
Documentation
! Note!
You can find supplementary documentation on the product pages at www.endress.com
Operating Instructions Electronic insert FEL50A for Liquiphant M/S

PROFIBUS PA
BA141F/00/en
Liquiphant M Density,
Density Computer FML621
BA335F/00/en
Liquiphant M FTL50, FTL51
KA143F/00/a6
KA144F/00/a6
Liquiphant M FTL51C
KA162F/00/a6
Liquiphant M FTL50-####### # 7 #, FTL51-####### # 7 #
KA163F/00/a6
Liquiphant M FTL50H-######## 7 #, FTL51H-######## 7 #
KA164F/00/a6
Liquiphant M FTL51C-######## 7 ##
KA165F/00/a6
Liquiphant M FTL5#-# ### ## # #3 #, FTL5#H-# ### ## # #3 #
KA220F/00/a6
Liquiphant M Density FTL50, FTL51
Electronic insert: FEL50D
KA284F/00/a6
Liquiphant M Density FTL50H, FTL51H
KA285F/00/a6
Liquiphant M Density FTL51C
KA286F/00/a6
Liquiphant M Sliding Sleeve for FTL51, G 1, NPT 1
KA151F/00/a6
Liquiphant M Sliding Sleeve for FTL51, G 1½, NPT 1½
KA152F/00/a6
Liquiphant M High-pressure Sliding Sleeve for FTL51, G 1, NPT 1
KA153F/00/a6
Liquiphant M High-pressure Sliding Sleeve for FTL51, G 1½, NPT 1½
KA154F/00/a6
Technical Information Nivotester FTL370/372, switching units in Racksyst design
Endress+Hauser 57
for Liquiphant M with electronic insert FEL57

TI198F/00/en
Nivotester FTL320, switching unit in Minipac design
for Liquiphant M with electronic insert FEL57
TI203F/00/de
General instructions for electromagnetic compatibility
(Test procedure, installation recommendation)
TI241F/00/en
Liquiphant M FTL51C, wetted parts with highly corrosion-resistant
ECTFE, PFA or enamel coating
TI347F/00/en
Isolating amplifier FTL325P, 1 or 3-channel switching units for top-hat rail mounting
for Liquiphant M/S with electronic insert FEL57
TI350F/00/en
Isolating amplifier FTL325N, 1 or 3-channel switching units for top-hat rail mounting
For Liquiphant M/S with electronic insert FEL56, FEL58
TI353F/00/en
Liquiphant S FTL70/71, for medium temperatures up to 280 °C
TI354F/00/en
Isolating amplifier FTL375P, 1 to 3-channel switching units for top-hat rail mounting
for Liquiphant M/S with electronic insert FEL57
TI360F/00/en
Isolating amplifier FTL375N, 1 to 3-channel switching units for top-hat rail mounting
For Liquiphant M/S with electronic insert FEL56, FEL58
TI361F/00/en
Liquiphant M Density,
Density Computer FML621
TI420F/00/en
Welding neck,
TI426F/00/en
ASME-BPE
Certificate of Compliance
SD310F/00/en
Functional safety (SIL) Liquiphant M/S with electronic insert FEL51 (MAX)
SD164F/00/en
Liquiphant M/S with electronic insert FEL51 (MIN)
SD185F/00/en
Liquiphant M/S with electronic insert FEL52 (MAX)
SD163F/00/en
SD186F/00/en
SD162F/00/en
SD187F/00/en
SD167F/00/en
SD279F/00/en
Liquiphant M/S with electronic insert FEL57 + Nivotester FTL325P (MAX)
SD111F/00/en
Liquiphant M/S with electronic insert FEL57 + Nivotester FTL325P (MIN)
SD231F/00/en
Liquiphant M/S with electronic insert FEL57+ Nivotester FTL375P (MAX)
58 Endress+Hauser
SD113F/00/en
Liquiphant M/S with electronic insert FEL56 + Nivotester FTL325N (MAX)
SD168F/00/en
Liquiphant M/S with electronic insert FEL56 + Nivotester FTL325N (MIN)
SD188F/00/en
Liquiphant M/S with electronic insert FEL58 + Nivotester FTL325N (MAX)
SD161F/00/en
Liquiphant M/S with electronic insert FEL58 + Nivotester FTL325N (MIN)
SD170F/00/en
Safety Instructions (ATEX) 4 0 II 1/2 G, EEx d IIC/B

(KEMA 99 ATEX 1157)
XA031F/00/a3
4 0 II 1/2 G, EEx ia/ib IIC/B
(KEMA 99 ATEX 0523)
XA063F/00/a3
4 0 II 1 G, EEx ia IIC/B
(KEMA 99 ATEX 5172 X)
XA064F/00/a3
4 0 II 1/2 G, EEx de IIC/B
(KEMA 00 ATEX 2035)
XA108F/00/a3
4 0 II 3 G, EEx nA/nC II
(EG 01 007–a)
XA182F/00/a3
Safety Instructions (NEPSI) Ex d IIC/IIB T3-T6 , Ex d IIC T2-T6

(NEPSI GYJ06424)
XA401F/00/B2
Ex ia IIC T2-T6, Ex ia IIB T3-T6

(NEPSI GYJ05556, NEPSI GYJ06464),
XC009F/00/b2
Ex nA II T3-T6, Ex nC/nL IIC T3-T6

(NEPSI GYJ04360, NEPSI GYJ071414)
XC010F/00/b2
Control Drawings Liquiphant M/S (IS and NI) Current output PFM, NAMUR Entity installation
Class I, Div. 1, 2, Groups A, B, C, D
Class I, Zone 0
Class II, Div. 1, 2, Groups E, F, G
Class III
ZD041F-I/00/EN
Liquiphant M, Liquiphant S (cCSAus / IS)

Class I, Div. 1, Groups A, B, C, D Ex ia IIC T6
Class II, Div. 1, Groups E, F, G
Class III
ZD042F-G/00/EN
Liquiphant M/S (NI), FTL50(H), FTL51(H), FTL51C, FTL70, FTL71

Class I, Div. 2, Groups A, B, C, D
Class II, Div. 2, Groups F, G
Class III
ZD043F-C/00/EN
Liquiphant M, Liquiphant S (cCSAus / XP)

Class I, Groups A, B, C, D
Class II, Groups E, F, G
Endress+Hauser 59
Class III
ZD240F/00/EN
Liquiphant M/S (IS and NI) PROFIBUS PA, FOUNDATION FieldbusClass I, Zone 0, IIC
Class I, Division 1, 2, Groups A, B, C, D
Class II, Division 1, 2, Groups E, F, G
Class III
ZD244F/00/EN
System information Liquiphant M

SI040F/00/en
60 Endress+Hauser
Endress+Hauser 61
62 Endress+Hauser
Endress+Hauser 63
Instruments International
Endress+Hauser
Instruments International AG
Kaegenstrasse 2
4153 Reinach
Switzerland
Tel. +41 61 715 81 00

Fax +41 61 715 25 00
www.endress.com
info@ii.endress.com
TI328F/00/en/05.10
71114953
SL/FM+SGML6.0 ProMoDo 71114953

Liquiphant M FTL50 (H), FTL51 (H) : Technical Information

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Liquiphant M FTL50 (H), FTL51 (H) : Technical Information

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Copyright:

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Technical Information

Liquiphant M FTL50(H), FTL51(H)

The reliable function is not affected by flow, turbulence,

Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Connectable load . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Electronic insert FEL55 (8/16 mA) . . . . . . . . . . . . . . 12 Performance characteristics. . . . . . . . . . . . . . . . . . . . 22

Influence of medium temperature . . . . . . . . . . . . . . . . . . . . . . . 22 Flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54

Certificates and approvals . . . . . . . . . . . . . . . . . . . . . 39

Function and system design

Modularity Point level switch

Point level switch

Electronic versions FEL51:

Electronics for continuous FEL50D:

Galvanic isolation FEL51, FEL52, FEL50A:

Design FTL50: Compact

Measuring range FTL50:

Electronic insert FEL51 (AC 2-wire)

Electrical connection Two-wire AC connection

Always connect in series with a load!

Check the following: 1 2

• That for low voltage

Output signal Safety mode Level Output signal LEDs

= unlit < 3.8 mA

Electronics FEL51 (AC, in compact housing)

Electrical connection Two-wire AC connection

Output signal Safety mode Level Output signal LEDs

= unlit < 3.8 mA

Electronic insert FEL52 (DC PNP)

Electrical connection Three-wire DC connection

Output signal Safety mode Level Output signal LEDs

= unlit < 100 µA

Electronics FEL52 (DC PNP, in compact housing)

Electrical connection Three-wire DC connection

FTL5#(H)- #######C3# (GN/YE) (GN/YE)

Output signal With valve connector or cable tail

= unlit L+ < 100 µA +

With M12x1 connector 52010285 / 52024216 (without LEDs)

< 100 μA = residual current L+ –

With M12x1 connector 52018763 (with LEDs)

< 100 μA = residual current L+ –

Electronic insert FEL54 (AC/DC with relay output)

Electrical connection Universal current connection with relay output

** See "Connectable load"

U~ 19…253 V AC, 50/60 Hz

Output signal Safety mode Level Output signal LEDs

Connectable load • Loads switched via 2 floating change-over contacts (DPDT).

Electronic insert FEL55 (8/16 mA)

Electrical connection Two-wire connection for separate switching unit

Output signal Safety mode Level Output signal LEDs

Connectable load • R = (U - 11 V) : 16.8 mA

250 Ω = (U – 11V) / 16.8 mA

Electronic insert FEL56 (NAMUR L-H edge)

Electrical connection Two-wire connection for separate switching unit

Output signal Safety mode Level Output signal LEDs

Electronic insert FEL58 (NAMUR H-L edge)

Electrical connection Two-wire connection for separate switching unit

Output signal Safety mode Level Output signal LEDs

Electronics FEL58 (NAMUR H-L edge,

Electrical connection Two-wire connection for separate switching unit

If the test magnet is held – + – +