Flow Check with Flange

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High accuracy

  • High measurement accuracy even in lower measuring range (ideal for leakage measurement)
  • Negligibly small loss of pressure
  • Display

  • Units freely selectable via display keys
  • Compressed air counter up to 1.999.999.999 m3
  • 180 ° turnable display e.g. for overhead installations
  • Interfaces and outputs

  • Digital interfaces such as Modbus RTU, Ethernet (PoE) and M-Bus
  • Connection to higher-level systems such as energy management systems, builiding management systems, SPS
  • Analogue output 4 - 20mA, pulse output
  • Comprehensive diagnosis functions

  • Read out via display or remote access via Modbus-RTU:
  • Exceeding maximum/minimum values °C
  • Calibration cycle
  • Error codes
  • Serial number
  • All parameters can be read out and changed via Modbus
  • The Flow Check with Flange allows for easy installation in existing piping through integrated measuring section (1/4˝ to 2“) and high measuring accuracy due to defined measuring section (inlet and outlet section). Display shows 2 values at the same time:

    • Actual flow in m³/h, l/min
    • Total consumption (counter reading) in m³, l resp. temperature measurement

    Values indicated in the display turnable by 180°C, e.g. in case of overhead installation. It follows a calorimetric measuring principle, making additional pressure and temperature measurements unnecessary.

    Technical data Flow Check



    m³/h, l/min (1000 mbar,

    20 °C) at compressed air or Nm³/h, Nl/min (1013 mbar, 0

    °C) for gases

    Units adjustable via keys at display

    m³/h, m³/min, l/min, l/s, ft/min, cfm, m/s, kg/h,

    kg/min, g/s, lb/min, lb/h


    Thermal mass flow sensor

    Measuring medium

    Air, gases

    Gas types are adjustable over PMH service software or PMH data logger


    Air, nitrogen, argon, helium, CO2, oxygen, vacuum

    Measure range

    See table above


    (m.v.: of meas. value) (f.s.: of full scale)

    ± 1.5 % of m.v. ± 0.3 % of f.s. on request

    ± 1.0 % of m.v. ± 0.3 % of f.s.

    Operating temperature

    -30-80 °C

    Operating pressure

    -1 to 16 bar optional to PN 40



    Digital output

    RS 485 interface (Modbus-RTU), optional:

    Ethernet-Interface PoE), M-Bus

    Analog output

    4-20 mA for m³/h e. g. l/min



    Pulse output

    1 Pulse per m³ or per liter galvanically isolated. Pulse value can be set on the display. Alternatively, the pulse output can be used as an alarm relay


    18-36 VDC, 5 W


    < 500 Ω


    Polycarbonate (IP 65)

    Measuring section

    stainless steel, 1.4301 or 1.4571


    Process connection

    Flange (to DIN EN 1092-1 e.

    g. ANSI 150 Ibs or ANSI 300 Ibs)

    Mounting position


    Flow Sensors

    To ensure that a compressed air system functions optimally, the proper amount of air needs to reach every part of it. However, to preserve energy, you also don’t want to supply more air than is needed. That’s where a flow sensor is highly useful. It not only makes sure that enough air gets to where it has to go but also that you are not wasting energy.