Go to content Go to main menu

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

Positive displacement dry dial meter for cold water in a plastic housing

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 wMBus.
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.

Show more

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
  • 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 Technologies

  • 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 (868 MHz)
    • EDC- combined M-Bus and pulse module

Product options

Measuring Principle
  • Positive Displacement Meters
  • Dry Dial
  • Dry Dial protection class IP 68 ("Copper Can")
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
  • 110 mm
  • 115 mm
  • 165 mm
  • 170 mm
  • 190 mm
  • Cold Water up to 30 °C
Housing Material
  • Polymer
Metrological Class horizontal (max.)
  • R 400
Operating pressure (max.)
  • MAP 16
Communication Technologies
  • Radio via LoRaWAN®
  • Radio via wireless M-Bus
  • Electronic Pulser
  • Reed Pulser
  • M-Bus
Additional Options
  • Modulator Disc for inductive sensors
Specified Units on Display
  • Cubic Meters (m³)


You can download a PDF Viewer from acrobat.adobe.com to view PDF files.

Other ZENNER products

Discover other interesting products in our product range.

Product imagePositive Displacement meter RTKD-M and RTKD-M-CCPositive Displacement meter RTKD-M and RTKD-M-CC
Positive Displacement meter RTKD-M and RTKD-M-CC
Positive Displacement Meter RTKD is equipped with dry dial and with the new d-register.RTKD-M is equipped with 8-digit rollers register and modulator disc for non-reactive ...
Product imagePositive Displacement water meter RTKP-MF-M-CCPositive Displacement water meter RTKP-MF-M-CC
Positive Displacement water meter RTKP-MF-M-CC
The RTKP-MF-M-CC is a manifold-type rotary piston dry-dial meter for cold water. Electronic, non-reactive scanning enables remote reading of meter data via radio with LoRaWAN® or ...
Product imageMobile wireless M-bus radio systemMobile wireless M-bus radio system
Mobile wireless M-bus radio system
The mobile wireles M-bus radio system especially for remote reading of water meters, heat meters and energy meters for heating and cooling according to DIN EN 13757-4.