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Hot water meter MTWD-M-CC and MTWD-N

Multi-jet dry dial meter for hot water with flood-proof (IP68) hermetically sealed glass/copper register.

The MTWD is ideally suited to measuring tasks at temperatures up to 90°C. By using special materials, outstanding measurement readings can be combined with a high maximum temperature.
The MTWD-M-CC is equipped with an 8-digit glass/copper register (IP68) 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 DIN EN 13757-4). A combined M-Bus/pulse module is also possible.
The MTWD-N is equipped with an 8-digit register and 1 l/ pulse as standard or is available with a 7-digit register and 10 l/pulse.

Product images

Hot water meter MTWD
Hot water meter MTWDHot water meter MTWD-N with modulator discHot water meter MTWD-M, for radio via wM-Bus


Hot water meter MTWD-M-CC and MTWD-N

Performance characteristics in overview

  • Multi-jet dry dial meter with protected magnetic
  • For horizontal and vertical installation, also available in standpipe and downpipe design on request
  • Equipped with glass/copper register (IP68) as standard
  • Brass body according to UBA (Federal Environment Office) list
  • Register rotatable 355°
  • Operating pressure MAP 16
  • Approved in accordance with MID


  • For the consumption measurement of hot and clean drinking water or service water up to 90°C

AMR options

  • (-M/-CC) 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 DIN EN 13757-4
    • EDC- combined M-Bus and pulse module
  • (-N) Can be retrofitted with pulser:
    • Standard pulse value 1 l/pulse
    • Optional 10 l/pulse

Product options

Measuring Principle
  • Multi-Jet Meters
  • Dry Dial
  • Dry Dial protection class IP 68 ("Copper Can")
Housing Material
  • Brass
Nominal Flow Q3 (≈ Qn)
  • Q3=6 (≈ Qn 3,5)
  • Q3=10 (≈ Qn 6)
  • Q3=16 (≈ Qn 10)
  • Q3=2,5 (≈ Qn 1,5)
  • Q3=4 (≈ Qn 2,5)
  • Q3=25 (≈ Qn 15)
Nominal Diameter DN (mm)
  • DN 15
  • DN 20
  • DN 25
  • DN 40
  • DN 32
Nominal Diameter (inch)
  • 1/2"
  • 3/4"
  • 1"
  • 1 1/2"
  • 1 1/4"
  • 2"
Length without connectors
  • 165 mm
  • 170 mm
  • 190 mm
  • 260 mm
  • 300 mm
Metrological Class horizontal (max.)
  • R 80
Metrological Class vertical (max.)
  • R 40
  • Hot water up to 90 °C
Operating pressure (max.)
  • MAP 16
Communication Technologies
  • Radio via LoRaWAN®
  • Radio via wireless M-Bus
  • Electronic Pulser
  • Reed Pulser
  • M-Bus
Additional Options
  • Copper Can (IP 68)
  • Modulator Disc for inductive sensors
Specified Units on Display
  • Cubic Meters (m³)


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