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Piston Type Water Meter RNK-L-RP-N

Rotary piston semi-dry-dial meter for cold water

The RNK-L-RP-N positive displacement meter records the flow rate according to the volumetric measuring principle. It offers a very high measuring range, excellent measuring stability and therefore guarantees extremely precise consumption recording.

The RNK-L-RP-N features a very low starting flow and is permitted for all installation positions. The meter is equipped with an 8-roller semi-dry dial register (RP = Roller Protected).
The meter is equipped with a reed switch interface as  standard. The interface enables remote reading of the meter data via PDC radio module with LoRaWAN® or wM-Bus.

The housing of the RNK-L-RP-N is made of glass-fibre reinforced polymer plastic, drinking water Approved and able for an operating pressure up to 16 bar.

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Product images

Piston Type Water Meter RNK-L-RP-N
Piston Type Water Meter RNK-L-RP-NPiston Type Water Meter RNK-L-RP-N


Piston Type Water Meter RNK-L-RP-N

Performance characteristics in overview

  • Rotary piston semi-dry-dial meter
  • Highest precision and reliability even in case of low flow rates
  • Housing made of glass-fibre reinforced polymer plastic
  • With integrated Backflow preventer, optional: Plug in backflow preventer (on request)
  • Around 50% lighter than a comparable meter with brass housing
  • Operating pressure MAP 16
  • Approved in accordance with MID


For the consumption measurement of cold and clean drinking water or service water up to 50 °C

AMR options

  • Serially equipped with communication interface for PDC-module (PulseDataCapture):
    • PDC-wireless M-Bus radio module
    • PDC- LPWAN-Radio module for LoRaWAN®
  • Retrofittable with pulser
    • Standard resolution 0,5 l/pulse (5 l/pulse at Q3 = 16)

Product options

Measuring Principle
  • Positive Displacement Meters
  • Wet Dial with protected Rollers
Housing Material
  • Polymer
Nominal Flow Q3 (≈ Qn)
  • Q3=1,6 (≈ Qn 1)
  • Q3=2,5 (≈ Qn 1,5)
  • Q3=4 (≈ Qn 2,5)
Nominal Diameter DN (mm)
  • DN 15
  • DN 20
Nominal Diameter (inch)
  • 1/2"
  • 3/4"
Length without connectors
  • 115 mm
  • 130 mm
  • 165 mm
  • 190 mm
Metrological Class horizontal (max.)
  • R 160
Communication Technologies
  • Reed Pulser
  • Cold Water up to 30 °C
Operating pressure (max.)
  • MAP 16
Specified Units on Display
  • Cubic Meters (m³)


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