Thermocouple
Thermocouple
Thermocouple
THERMOCOUPLE
AMETEK Exhaust Gas (EGT) and Wheel Space
Frame Turbine Thermocouples meet the specific
operational and performance requirements for
REPLACEMENT and RETROFIT Frame
gas turbine applications. AMETEKs
expertise in solving creep, stress,
rupture, corrosion, EMF drift, and other
problems affecting sensor performance
has resulted in a robust line of single and
dual element thermocouple designs. Typical
applications include wheel space and exhaust
gas temperature monitoring.
AMETEK EGT and Wheel Space Thermocouples
use Type K wire with MgO insulation and stainless
steel sheathing. The thermocouple probe tips
and terminations are hermetically sealed against
exposure to operational environments and have
been qualified to ASTM E585 and ASTM E608
standards, with a leak rate of less than
1 x 10 -6 cc/sec.
For exhaust gas applications, AMETEK
manufactures production-qualified radiation
shields. These shields, together with AMETEK
EGT Thermocouples, form a system that controls
thermocouple immersion depth, eliminates
fretting due to vibration, and provides improved
turbine performance.
SPECIFICATIONS
Time Response
Lengths
Calibration
Sheath Diameters
0.062" to 0.125"
Hermetic Seal
1 x 10 -6 cc/sec
IN
(MM)
HEADQUARTERS
AMETEK Power Instruments
50 Fordham Road
Wilmington, MA 01887
Tel: 978.988.4903
Fax: 978.988.4990
power.sales@ametek.com
EUROPEAN HEADQUARTERS
Unit 20, Ridgeway
Donibristle Industrial Estate
Dalgety Bay, Dunfermline, KY119JN
Scotland U.K.
Tel: 44.1383.825630
Fax: 44.1383.825715
power.sales@ametek.com
THERMOCOUPLE
FIT-IT & FORGET-IT
Eliminate Exhaust Gas
Temperature (EGT)
thermocouple concerns
with AMETEKs new EGT
thermocouple product
offering for Frame turbine
applications. AMETEK has worked
closely with the turbine OEM to design
and engine test this thermocouple as a
direct replacement and upgrade for all new
and existing EGT thermocouples. The new
EGT thermocouples are qualified and meet all
design specifications.
MISTAKE-FREE INSTALLATION
The new EGT design makes it impossible to
over-tighten, while ensuring the proper
immersion depth of the thermocouple into the
radiation shield. Furthermore, the new EGT
design allows the cable leads to be attached to
the thermocouple prior to insertion into the
radiation shield, and also enables a convenient,
stress-free orientation of the thermocouple
junction box and cable leads.
SINGLE EGT THERMOCOUPLES AND
COMPLETE UPGRADE KITS AVAILABLE
Whether you are upgrading from the
302A4010Pxxx, 351A3488Pxxx, or the
362A1102Pxxx EGT thermocouples, AMETEK
can provide either the thermocouples only or the
complete upgrade kit with all the required
fittings, adapters, and cables. A more detailed
description of the many different upgrade
options available, including parts lists,
installation instructions, and drawings, can be
found in AMETEKs EGT THERMOCOUPLE
RETROFIT MANUAL.
SPECIFICATIONS
Calibration
Environment
Type K, ungrounded
Error: special limits (0.4%)
Approximately 2.9 seconds
Hermetic Seal
Lengths
Time Response
THERMOCOUPLE CABLE
AMETEK P/N: 8EH6 SERIES
OEM P/N: 361A2327 SERIES
TYPICAL
FITTING
AMETEK P/N: 3610A40P001
RADIATION SHIELD
AMETEK P/N: 8RS1 SERIES
OEM P/N: 362A1344 SERIES
THERMOCOUPLE
AMETEK P/N: 8TR4D SERIES
OEM P/N: 362A1102 SERIES
TYPICAL
TYPICAL
HEADQUARTERS
EUROPEAN HEADQUARTERS
50 Fordham Road
Wilmington, MA 01887
Tel: 978.988.4903
Fax: 978.988.4990
power.sales@ametek.com
THERMOCOUPLE
AMETEK Hermetic Exhaust Gas (EGT) and
Wheel Space Frame Turbine Thermocouples
are the latest OEM production qualified design
and incorporate many improvements over
previous thermocouple offerings. AMETEKs
new thermocouple is 100% hermetic which
ensures longer product life, improved
temperature accuracy, and no troublesome
insulation resistance failures during operation.
The junction box mounts directly to the radiation
shield or turbine case and eliminates the
problem of mineral insulated cable extending
outside the turbine. Materials were carefully
selected to ensure long life and to eliminate
vibration and galling failures. This new
thermocouple, used in conjunction with
AMETEKs flexible cable, provides a product
that is not only easier to install and maintain,
but also a product that is more reliable,
accurate, and longer lived.
CABLE
The flexible, stainless steel braided
thermocouple Cable mates directly to the
new Hermetic Thermocouple and creates a
much more reliable thermocouple system
than previous designs. The Cable uses Type
K wire and terminal lugs so no secondary
junction errors are introduced into the
thermocouple circuit. The terminal lugs use
two different sizes of captivated nuts making
it impossible to install incorrectly or to lose
any of the hardware.
SPECIFICATIONS
Calibration
Environment
Type K, Ungrounded
Time Response
Varies from 1.7 to 4.0 seconds depending on
tip configuration
Lengths
Hermetic Seal
Tip Diameters
Sheath Diameters
Various from 0.125" to 0.188"
IN
(MM)
HEADQUARTERS
AMETEK Power Instruments
50 Fordham Road
Wilmington, MA 01887
Tel: 978.988.4903
Fax: 978.988.4990
power.sales@ametek.com
EUROPEAN HEADQUARTERS
Unit 20, Ridgeway
Donibristle Industrial Estate
Dalgety Bay, Dunfermline, KY119JN
Scotland U.K.
Tel: 44.1383.825630
Fax: 44.1383.825715
power.sales@ametek.com
THERMOCOUPLE
AMETEKs Individual EGT Probe System
(AMETEK P/N 8TC34BAG1, GE P/N L44830P01)
is designed for retrofit on LM2500 and LM5000
gas turbines. Exhaust gas temperatures are
measured using a combination of individual
thermocouples mated to a flexible harness
assembly, eliminating the need for rigid harness
systems. Operators and overhaul facilities can
replace a single probe without removing a full
harness quadrant or affecting other serviceable
system components. This results in lower
component and maintenance costs and shorter
turbine downtime cycles.
The Individual EGT System incorporates a
combination of AMETEK thermocouple designs
that are currently qualified and operating on
production gas turbines. Its probe design is
identical to the design presently operating on
production LM2500 and LM5000 turbines, while
its junction box is identical to that utilized on
other industrial and aerospace turbine
thermocouples.
AMETEK can provide either averaging or
individual mating cables. The averaging cables
mimic the output of the rigid harness system
whereas the individual cables provide a separate
output for each of the 11 thermocouples. This
flexibility enables the operator to select the
measurement that best captures turbine
performance.
SPECIFICATIONS
THERMOCOUPLE PROBE ASSEMBLY
Temperature Range
Conductor
Accuracy
Outer Jacket
Time Response
Operating Temperature
To 1000F (538C)
Insulation
Output
Multi-Layer System:
Primary Insulation
- Mica Tape
Secondary Insulation - Refrasil Braid
- E Type Fiberglass
Type K (millivolts)
Vibration
12 Gs
Leakproof
Hermetically sealed
IN
(MM)
HEADQUARTERS
AMETEK Power Instruments
50 Fordham Road
Wilmington, MA 01887
Tel: 978.988.4903
Fax: 978.988.4990
power.sales@ametek.com
EUROPEAN HEADQUARTERS
Unit 20, Ridgeway
Donibristle Industrial Estate
Dalgety Bay, Dunfermline, KY119JN
Scotland U.K.
Tel: 44.1383.825630
Fax: 44.1383.825715
power.sales@ametek.com