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Positive Displacement meter RTKD-L-M and RTKD-L-N

Equipped with the newly developed dry dial D-register by ZENNER, the new RTKD-L positive displacement meter is a meter for all who place the highest demands on reliability and measuring accuracy.

The RTKD-L-M 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 RTKDL-M features a very low starting flow and is permitted for all installation positions.

The meter is equipped with an 8-digit dry dial meter register and a modulator disc. This enables electronic, non-reactive scanning and is the basis for remote reading of meter data via radio with LoRaWAN® or wM-Bus (according to OMS). A combined M-Bus/pulse module is also possible.

The housing of the RTKD-L-M comprises glass-fibre reinforced plastic approved for drinking water with brass connection threads and is designed for an operating pressure of up to 16 bar.

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Product images

Positive Displacement meter RTKD-L with plastic housing
Positive Displacement meter RTKD-L with plastic housingPositive Displacement meter RTKD-L with modulator discPositive Displacement meter RTKD-L with radio module


Positive Displacement meter RTKD-L-M and RTKD-L-N


  • Positive displacement dry dial meter in a plastic housing
  • For any installation position (except for overhead)
  • Highest precision and reliability even in case of low flow rates
  • Register cap made of UV-resistant plastic
  • Optionally available with copper-glass counter (IP 68)
  • Housing made of glass-fibre reinforced polymer plastic
  • Register rotatable 355°
  • Operating pressure MAP 16
  • Approved in accordance with MID


  • For the consumption measurement of cold and unpolluted drinking water or service water up to 30°C

AMR options

  • As standard with communication interface for EDC modules (Electronic Data Capture):
    • EDC LPWAN radio module (868 MHz) for LoRaWAN®
    • EDC wireless M-Bus radio module according to OMS standard (868 MHz), EN 13757-4
    • EDC- combined M-Bus and pulse module

Product options

Nominal Diameter (inch)
  • 1/2 "
  • 3/4 "
Length without connectors
  • 110 mm
  • 115 mm
  • 165 mm
  • 170 mm
  • 190 mm
  • Cold Water up to 30° C
Specified Units on Display
  • Cubik Meters (m³)
Nominal Diameter DN (mm)
  • DN 15
  • DN 20
  • Dry Dial
  • Dry Dial protection class IP 68 ("Copper Can")
AMR Technologies
  • Electronic Pulser
  • M-Bus
  • Radio via LoRaWAN®
  • Radio via LoRaWAN®
  • Radio via wireless M-Bus
  • Radio via wireless M-Bus (OMS)
  • Reed Pulser
Operating pressure (max.)
  • MAP 16
Additional Options
  • Modulator Disc for inductive sensors
Housing Material
  • Plastic
Measuring Principle
  • Positive Displacement Meters
Nominal Flow Q3 (≈ Qn)
  • Q3=1,6 (≈ Qn 1)
  • Q3=2,5 (≈ Qn 1,5)
  • Q3=4 (≈ Qn 2,5)
Metrological Class horizontal (max.)
  • R 400


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