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Ultrasonic apartment / domestic water meter IUWS

The IUWS ultrasonic water meter guarantees reliable recording of the meter data for individual consumption billing in the residential or domestic water sector.

The IUWS is equipped with a 9-digit LCD display. The integrated radio interface is preset at the factory to wireless M-Bus (OMS) or LoRaWAN®. If required, this can also be changed at a later date. All variants are approved for any installation and are therefore also available in the usual lengths for riser and downpipe installation. A head-down mounting is also possible. All materials, which are used in the drinking water section, comply with the required standards, guidelines and the
current German drinking water approval (other country-specific drinking water approvals on request).

Product images

Ultrasonic water meter IUWS
Ultrasonic water meter IUWSUltrasonic water meter IUWS


Ultrasonic apartment / domestic water meter IUWS

Performance characteristics in overview

  • Switchable radio technology
  • Highest precision and reliability even in case of low flow rates
  • Protection class IP68
  • Insensitive to deposits and particles
  • No straight inlet or outlet needed (U0/D0) according to OIML R49 and DIN EN ISO 4064
  • Electronic, battery powered LCD register with NFC interface
  • Smart Metering functions
  • Alarm and statistic functions
  • Galvanically separated NFC interface
  • Battery life up to 15 years (depending on configuration and environmental conditions)
  • Approved in accordance with MID (2014/32/EU)
  • OMS certification for BSI-compliant smart meter gateway connection
  • Plug and play detection of radio technology via NDC radio module
  • Configuration-App


  • For consumption measuring of drinking water and unpolluted service water up to 50 °C

AMR options

  • Integrated wM-Bus or LoRaWAN® radio interface
  • NFC interface (=Near Field Data Capture) for connecting an external NDC module and for device configuration

Readout options of the measuring device via the NFC interface (Near Field Communication)

  • Measuring instrument ID (serial number)
  • Current (balanced) consumption display or Total volume in case of an overflow
  • Date / Time
  • Firmware version
  • Up to 15 previous month’s values
  • Temperature
  • Key date / Key date volume
  • Forward flow volume / Return flow volume
  • Alarms or error messages
  • Battery end

Product options

Measuring Principle
  • Ultrasonic Meters
  • Electronic
Nominal Flow Q3 (≈ Qn)
  • Q3=1,6 (≈ Qn 1)
  • 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 50
  • DN 32
Nominal Diameter (inch)
  • 1/2"
  • 3/4"
  • 1"
  • 1 1/2"
  • 1 1/4"
  • 2"
Length without connectors
  • 105 mm
  • 110 mm
  • 115 mm
  • 150 mm
  • 130 mm
  • 145 mm
  • 160 mm
  • 165 mm
  • 170 mm
  • 175 mm
  • 190 mm
  • 200 mm
  • 260 mm
  • 270 mm
  • 300 mm
Metrological Class horizontal (max.)
  • R 500
Communication Technologies
  • Radio via LoRaWAN®
  • Radio via wireless M-Bus
  • Cold water up to 50 °C
Operating pressure (max.)
  • MAP 16


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