The WI-N water meter is designed fur use with heavily contaminated water, e.g. in agriculture, in sewage treatment plants or wastewater systems.
This field of application requires particularly robust meters that also function reliably under the most difficult conditions. Our irrigation meters guarantee this by positioning the measuring insert in the upper section of the pipe, where there is generally only a small number of suspended particles in the running water. The meter easily takes a level of impurity of up to 30% in its stride. Where there is very heavy contamination, external filters can be inserted upstream of the water meter. The factory-tested measuring insert is the same for all meter sizes and can be delivered with the following measurement accuracy:
Qmax-Qt: ± 3% (value class A+B)
Qt-Qmin: ± 5% (value class A)
The mechanical counter is completely encapsulated and hence protected against impurities. As standard, the meters are supplied with a lockable protective metal cap which acts as a dependable protection for the counter, even in harsh conditions. Active and passive pulsers can be retrofitted at any time without damaging the calibration seal.
All conventional sensor versions are available, with reed contact, optical and NAMUR induction encoders, and configuring the integration into data transfer and guidance systems is very simple.
Pulser values for Woltman Meters*
DN 40 - DN 125 Standard 100 L/Imp.
DN 150 - DN 300 Standard 1.000 L/Imp.
DN 400 - DN 500 Standard 10.000 L/Imp.
(* other values on request)
Performance Characteristics
- Water meter for polluted water or as a check meter in the fresh water area
- Simple to maintain thanks to the removable measuring insert
- Measuring accuracy conforms with Class A
- Water meter for horizontal and vertical installation positions
Product Features
- Length without connectors200 mm
225 mm
250 mm
300 mm
350 mm
Housing MaterialCast Iron
Nominal Flow QnQn 30
Qn 50
Qn 90
Qn 125
Qn 175
Qn 250
Nominal Diameter DN (mm)DN 50
DN 65
DN 80
DN 100
DN 125
DN 150
DN 200
RegisterDry Dial
Measuring PrincipleWoltman Irrigation Meters
TemperatureSafe up to 50° C
Specified Units on DisplayCubik Meters (m³)
AMR TechnologiesReed Pulser
Opto Sensor
Namur Sensor
Metrological Class horizontal (max.)A
Operating Pressure (max.)PN 16
