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Bulk water meter WPD / WPHD

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.

Product images

Woltman bulk water meter WPHD
Woltman bulk water meter WPHDWoltman bulk water meter WPHDWoltman bulk water meter WPHD with EDC communication modulWoltman bulk water meter WPHD with EDC communication modul


Bulk water meter WPD / WPHD

Performance characteristics in overview

  • 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 40 – 150), WPHD (DN 200 – 300)
  • For horizontal and vertical installation
  • Replaceable MID-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 and OIML


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

AMR options

  • Can be combined with stationary GSM system
  • Retrofittable with EDC module (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
  • Woltman parallel
  • Dry Dial protection class IP 68 ("Copper Can")
Housing Material
  • Cast Iron (GGG)
Nominal Flow Q3 (≈ Qn)
  • Q3=25 (≈ Qn 15)
  • Q3=40 (≈ Qn 25)
  • Q3=63 (≈ Qn 40)
  • Q3=100 (≈ Qn 60)
  • Q3=250 (≈ Qn 150)
  • Q3=400 (≈ Qn 250)
  • Q3=1000 (≈ Qn 600)
  • Q3=1600 (≈ Qn 1000)
  • Q3=2500 (≈ Qn 1500)
  • Q3=630 (≈ Qn 400)
Nominal Diameter DN (mm)
  • DN 50
  • DN 80
  • DN 100
  • DN 125
  • DN 150
  • DN 200
  • DN 250
  • DN 300
  • DN 400
  • DN 500
Length without connectors
  • 200 mm
  • 225 mm
  • 250 mm
  • 300 mm
  • 350 mm
  • 450 mm
  • 500 mm
  • 600 mm
  • 800 mm
Metrological Class horizontal (max.)
  • R 200
Communication Technologies
  • Combined M-Bus and pulse module
  • Radio via LoRaWAN®
  • Radio via wireless M-Bus
  • Electronic Pulser
  • Reed Pulser
  • M-Bus
  • Radio Special System (GSM)
  • Cold water up to 50 °C
Operating pressure (max.)
  • MAP 10
  • MAP 16
Specified Units on Display
  • Cubic Meters (m³)


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