For measuring of fluctuating flows in the utility sector.


  • Calibratable and exchangeable measuring insert
  • For horizontal installation
  • Sealed measuring insert for better accuracy
  • Hydraulic bearing relief
  • Encapsulated counter of glass/copper IP 68
  • Complete head unit with counter and sensors can be rotated by 350° for easier reading
  • System compatibility, WESAN WS G can be extended with IZAR RADIO (clip-on radio module) or IZAR PULSE (clip-on pulse module)
  • Strong protection against magnetic manipulation
  • General
    Medium temperature range°C1 ... 30
    Temperature safety°C1 ... 50
    Ambient operating temperature°C1 ... 55
    Ambient storage temperature°C1 ... 55
    Nominal pressurePNbar161
    Protection classIP 68
    1 see also special versions
  • Technical data
    Nominal diameterDNmm506580100150
    Permanent flow rateQ3m3/h254063100250
    Minimum flow rateQ1m3/h0.6311.582.56.25
    Transitional flow rateQ2m3/h11.62.52410
    Overload flow rateQ4m3/h31.255078.75125312.5
    Starting flow ratel/h60609090150
    Flow rate at 0.1 bar pressure lossm3/h21225560143
    Pressure loss at Q3bar0.140.340.130.280.31
  • Approval
    Nominal diameterDNmm506580100150
    MID (A 0445/3505/2011)
    Dynamic range (Q3/Q1)R40•H40•H40•H40•H40•H
    Potable waterAoC DEUAoC DEUAoC DEUAoC DEUAoC DEU

    Information pursuant to Article 33 (1) of Regulation (EC) No 1907/2006 of the European Parliament and of the Council of 18 December 2006:
    This product series contains components with the following substances in a concentration of more than 0.1% weight by weight (w/w):
    - Lead (CAS no.: 7439-92-1)

  • Display range
    Nominal diameterDNmm506580100150
    0.5 l ... 999,999 m³
    5.0 l ... 9,999,999 m³
  • Dimensions
    Nominal diameterDNmm506580100150
    Overall length (DIN 19625)Lmm270300300360430 / 500
    Overall length (DIN ISO 4064)Lmm300300350350500
    Flange diameterDmm165185200220285
    Hole circle diameterKmm125145160180240
    Number of screwholespcs444 / 888
    Screwhole diameterD1mm1818181823
    Height to remove measuring insertmm240240330340620
    DiameterØ Bmm110110110110110
    Meter widthmm173173239239310
  • Special versions

    - Versions with different nominal pressure on request
    - Flange for ANSI and BS on request
    - Temperature up to 90 °C on request
    - Special pulse values on request
    - Special overall lengths on request

  • Presure loss graph / Typical error graph