620 Volumetric Meter

Dry Dial

Main characteristics Applications

DN 15 to 40, PN 16 The 620 is a high precision meter.

Due to its unique piston measuring chamber even drops of water are
Unrivalled accuracy and measuring range counted.
Small pressure drop A clear view is either provided through a register with an integrated wiper
High resistance to impurities or a sealed metal/glass register that does not fog. For a faster and more
comfortable readout the 620 is prepared for AMR.
Quiet operation Due to our broad product range of system solutions you can adapt the 620 to
Suitable for cold water from 0.1 °C up to 50 °C all your AMR needs.
Not least by its tamper proof design and its long life span you will be glad
you used the 620.

Available options

HRI electronic sensor (Pulse Unit, Data Unit)

Connectors
Non-return valve
Plastic and metal/glass register

www.sensus.com
Typical Marking Typical Accuracy Curve

5%

0%

Accuracy (%)
-5%

-10%

Markings can vary according different market or -15%

Q1 Q2 Flow Q3 Q4
metrological specifications.

Accuracy and reliability Typical Head Loss Curve

Thanks to the advanced design of its measuring 1

chamber the meter has an extreme low starting

flow.
It can be supplied with metrological seal according
Head loss (bar)

the MID regulation 2004/22/EC with a ratio R up to

-32
315 (Q3 2.5 up to R400).
15

20

25

40
DN

DN

DN

DN
Foreign matter present in the water is filtered out
by either the tubular strainer on the inlet or the
seat strainer. Particles can go through the meter
without damage; the patented elastic pivot enables
the particles to pass between the piston and the
measuring chamber. All the gears are situated 0,1

in the dry register, which eliminates any risk of 1 3 5 7 10 20 100

blockage due to suspended particles in the water. Flow rate (m³/h)

The 620 water meter keeps its metrological

accuracy for many years of operation, even in very
difficult working conditions.

Cross Section

620, DN 15 620, DN 20 620, DN 25, DN 32 and DN 40

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Approvals Performance Data

EC type-examination certificate Metrological characteristics in accordance with Measuring Instruments

Directive
in conformity with
Nominal Size DN mm 15 20 25 32 40
• 2014/32/EU (MID)
Permanent flowrate Q3 m³/h 2.5 4 6.3 10 16
• OIML R49:2013
Ratio “R” Q3/Q1 R 400 315
• EN 14154:2005+A2:2011 (1)
Maximum flowrate Q4 m³/h 3.125 5 7.875 12.5 20
• ISO 4064:2014 (1)
Minimum flowrate
Q1 l/h 6.25 10.00 20 31.75 50.79
(tolerance ±5%)
(1)
Transitional flowrate
Q3 2,5 DE-07-MI001-PTB002 (tolerance ±2%)
Q2 l/h 10.00 16.00 32 50.79 81.27

Q3 4 DE-07-MI001-PTB004 (1) Values for R=400 for DN 15-20 and R=315 for DN 25-32
Q3 6,3 - 16 DE-15-MI001-PTB019

Certificate of compliance for potable drinking water Dimensions and Weights

KTW/DVGW (D) ACS (F)
WRAS (UK) Hydrocheck (B) Nominal Size DN mm 15 20 25 32 40
Length L mm 1701) 1903) 2604) 260 300
KIWA ATA (NL)
Width D mm 79.7 93.5 135 135 150
Total height H mm 132.7 123 186 186 193
Legibility Height to pipe axis h mm 15.5 37.5 68 68 75
Tail Diamter inch G¾"B2) G1"B G1¼"B G1½"B G2"B
The display on 8 drums (5 for m3, 3 for litres) and Piece mm 26.44 33.25 41.91 47.80 59.61
1 pointer ensures perfect readability. The lowest
Thread Pitch 1.81 2.31 2.31 2.31 2.31
resolution is 0.05 litres. The dial has a central disc
whose rotation indicates the passage of water. This Weight kg 1.0 1.6 3.7 3.8 5.0
indicator can be used to reveal a downstream leak.
(1) Also available in length 110, 115, 134 and 165 mm
The plastic dial (1) is equipped with a wiper for (2) Also available in length 165 mm with 1" threads
optimum legibility under all conditions. The 620 (3) Also available in length 130 and 165 mm
water meter can operate in any position and its (4) Also available in length 198 mm (with Q3 4)
dry dial register can be rotated up to 350º. The dial
can therefore be easily read under all conditions of
use. As an option, the meter can be supplied with a
metal/glass register, making it perfectly water-tight
(IP 68).

Dimensional Diagram

620, DN 15 with HRI 620, DN 20 620, DN 25, DN 32 and DN 40

For the installation guidelines please refer to the manual “Volumetric Meter Manual” on our website.

620
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Metrological characteristics

Nominal size 2.5 m3/h 4 m3/h 6.3 m3/h 10 m3/h 16 m3/h

Connection size DN 15 DN20 DN 25 DN 25, DN 32 DN 40
Flow range Q1 0.00625 m3/h 0.010 m3/h 0.020 m3/h 0.032 m3/h 0.051 m3/h
Q2 0.010 m3/h 0.016 m3/h 0.032 m3/h 0.051m3/h 0.081 m3/h
Q3 2.5 m3/h 4 m3/h 6.3 m3/h 10 m3/h 16 m3/h
Q4 3.125 m3/h 5 m3/h 7.875 m3/h 12.5 m3/h 20 m3/h
Q2 / Q1 1.6
Q 3 / Q1 400* 315**
Accurarcy class ± 2 % (Q2 ≤ Q ≤ Q4) for water temperatures ≤ 30 °C
± 3 % (Q2 ≤ Q ≤ Q4) for water temperatures > 30 °C
± 5 % (Q1 ≤ Q ≤ Q2)
Temperature range 0.1 °C ... 50 °C
Pressure range (MAP) 0.3 bar (0.03 MPa) - 16 bar (1.6 MPa)
Pressure loss class ∆P 0.63 bar (0.063 MPa)
Environmental class I
Mechanical Environmental Conditions M2
Climatic Environmental Conditions 5 °C ... 70 °C
Electromagnetic Conditions E2

* further available ratios Q3 / Q1: 315, 250, 200, 160, 125, 100, 80, 63, 50, 40
** further available ratios Q3 / Q1: 250, 200, 160, 125, 100, 80, 63, 50, 40

HRI options

The dial of the meter is equipped as standard with a

pointer able to activate the HRI sensor. By detecting
the rotation of the pointer and its direction, the
electronic circuitry of the HRI converts this into
reliable electrical output signals.
There are two main variants of HRI:

1. HRI Pulse Unit (A-version)

This gives a pulse output which can be used for
reliable counting of the volume.

2. HRI Data Unit (B-version)

The HRI Data Unit a is a data interface which
supplies serial output according M-Bus standard
EN13757 which can be connected to M-Bus
converters.
The serial interface can also be used to configure
a pulse output. This pulse output can be used
alternatively to the serial output.

For more information please refer to the HRI

datasheet.

Certified according to ISO 9001

Quality Management System Quality Austria Reg.no. 3496/0

UK & Ireland Enquiries

Sensus UK Systems Ltd, 3 Lindenwood Crockford Lane, Chineham Business Park
Basingstoke RG24 8QY UK
T: +44 (0) 1256 372800 F: +44 (0) 1256 707203 Email: info.gb@xyleminc.com www.sensus.com

International Enquiries
Sensus GmbH Ludwigshafen, Industriestrasse 16, 67063 Ludwigshafen Germany
T: +49 (0) 621-6904-0 F: +49 (0) 621-6904-1409 Email: info.int@xyleminc.com www.sensus.com

12-2019 • 0006 Subject to changes without prior notice.

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