Water Meter Zenner Type RTKD-M NAD RTKD-N Size 1 inch (Dn25mm)

Type RTKD (Multi-jet dry dial meter for cold water)Size 1 inch (Dn25mm)

RTKD positive displacement meter is a meter for all who place the highest demands on reliability and measuring accuracy.

The RTKD records the flow rate using the volumetric measuring principle and guarantees extremely precise consumption recording and accounting. The RTKD positive displacement meter also has a high measuring range and a very good measurement stability.

The RTKD is equipped with the ZENNER D-register and is available in two versions:

RTKD-M with 8-digit-rollers register and modulator disc for non-reactive scanning for radio (wireless M-bus, LPWAN), M-bus or pulse. RTKD-N with 7- or 8-digit rollers for different pulse values and retrofittable
with mechanic pulser.


  • For the consumption measuring of cold potable water up to 50° C
  • Water meter for any installation position (not overhead!)

AMR options

  • RTKD-N with pulse output (reed) for remote readout
  • Standard pulse value 10 l/pulse, optional 1 l/pulse available

RTKD-M serially equipped with communication interface for:

  • Electronic pulser
  • Wired M-bus
  • Radio via wireless M-bus
  • Radio via LPWAN (LoRaWAN™, SIGFOX)


Performance Characteristics

  • Dry dial piston type register with shielded magnetic coupling
  • Register can be turned through 355°
  • High-quality UV-resistant plastic inspection window
  • Operating pressure MAP 16
  • Available with flood-proof (IP68) hermetically sealed glass/copper register
  • Approved in accordance with MID

Product Features

Measuring Principle Positive Displacement Meters
Length without connectors 105 mm
110 mm
115 mm
165 mm
170 mm
190 mm
260 mm
Housing Material Brass
Register Dry Dial
Nominal Flow Q3 (≈ Qn) Q3=1,6 (≈ Qn 1)
Q3=2,5 (≈ Qn 1,5)
Q3=4 (≈ Qn 2,5)
Q3=6,3 (≈ Qn 3,5)
Q3=10 (≈ Qn 6)
Nominal Diameter DN (mm) DN 15
DN 20
DN 25
DN 32
Nominal Diameter (inch) 1/2 ”
3/4 ”
1 1/4″
Temperature Cold water up to 50° C
Specified Units on Display Cubik Meters (m³)
AMR Technologies Reed Pulser
Electronic Pulser
Radio via wireless M-Bus
Funk via LPWAN (LoRaWAN™, SIGFOX™)
Additional Options Anti-Magnet-Protection
Copper Can (IP 68)
Modulator Disc for inductive sensors
Nano Coating (Antifog)
Wiper for lens (Antifog)
Metrological Class horizontal (max.) R 250
R 400

SKU: 47-1-2-1-1-1-1 Category: Tags: ,


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