Woltman meter with impeller axis arranged in parallel to the flow direction

The bulk water meter WPD / WPHD is used to record high flows in drinking water distribution and in industry, with low pressure loss and a predominantly constant flow profile at the same time.

The meter is equipped with a 6-roller dry dial register (IP68) and a modulator disc. This enables electronic, reaction-free scanning and is the basis for remote reading of the meter data via radio with LoRaWAN® or wM-Bus. A combined M-Bus / pulse module is also possible.

A mechanical pulser can also be connected in parallel.




  • Woltman parallel type
  • 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)
  • WPD (DN 50 – 150), WPHD (DN 200 – 300)
  • For horizontal and vertical installation
  • Replaceable MID/OIML-compliant metrological unit
  • Highest precision and reliability even in case of low flow rates
  • Flood-proof hermetically sealed glass/copper register (IP68)
  • Low starting flow and high overload security
  • Wide measuring range, low pressure loss
  • Hydraulic bearing relief
  • Durable measuring stability
  • Swirl-reducing inlet
  • No straight inlet or outlet needed (U0/D0) according to OIML R49 and DIN EN ISO 4064
  • Optimally equipped for remote readout
  • Register rotatable 355°
  • Operating pressure MAP 16 (optionally MAP 10)
  • Approved in accordance with MID/OIML


  • For the consumption measurement of cold and clean drinking water or service water up to 50°C

AMR Technologies

  • Can be combined with stationary GSM system
  • Retrofittable with EDC module (Electronic Data Capture):
    • EDC LPWAN radio module for LoRaWAN®
    • EDC wireless M-Bus radio module
    • EDC combined M-Bus and pulse module

Product Options

Measuring Principle Woltman parallel
Register Dry Dial protection class IP 68 (“Copper Can”)
Nominal Diameter DN (mm)
  • DN 50
  • DN 80
  • DN 100
  • DN 125
  • DN 150
  • DN 200
  • DN 250
  • DN 300
Temperature Cold water up to 50° C
Housing Material Cast Iron
Operating pressure (max.)
  • MAP 10
  • MAP 16
Communication Technologies
  • Radio via LoRaWAN®
  • Radio via wireless M-Bus
  • Electronic Pulser
  • Reed Pulser
  • M-Bus
  • Radio Special System (GSM)
Specified Units on Display Cubic Meters (m³)