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Hydrogen Dispenser

with metrological approval and receipt printer driver

Product description

The design of the C401 is a logical next step, based on our successful product lines for harsh surroundings and explosive atmospheres. The C-series is designed with a focus on high-quality and reliability for use in metrological / custody transfer applications. The C401 is a Hydrogen dispenser in conjunction with Coriolis mass flow meters.

Ruggedness and reliability is what Fluidwell stands for and it is now available in a comprehensive well designed and purpose driven Zone 2 flow computer, approved by PTB (Germany).

  • Robust aluminum field enclosure suitable for outdoor truck mounting.
  • Straight forward operation and automated control of the Coriolis mass flow meter.
  • All info at a glance, with the large backlit graphical LCD suitable for extreme outdoor use.


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  • Metrology approved system by PTB, according to MID MI002 / OIML R137.
  • Zone 2 ATEX certification according to: EX II 3 G Ex ec IIC T4 Gc.
  • Displays current volumetric and mass flow rate, deliverd total, time/date, status indication, engineering and time units.
  • Low flow rate and cut-off limit alarms with adjustable hysteresis.
  • Application driven design for truck dispense of Hydrogen (GH2+).
  • Dedicated communication port for Coriolis mass flow meter.
  • Communication port for data transfer to industrial Open Platform Communications (OPC).
  • Communication port for direct ticket printing.
  • Full integration and control of the Coriolis mass flow meter.
  • Extensive logging of process data, events and error handling.
  • Large graphical user interface with large digits.
  • Bright backlight for good readability during day and night.
  • Multiple languages supported.
  • Ambient temperature: -25°C to +55°C (-13°F to 133°F).
  • For further details or new opportunities, please contact us: +31 413 343786 or click here.


  • Hydrogen distribution on board of trucks or marine bunkering. For accurately register metrologically the dispensed amount of Hydrogen.
  • For loading and unloading Hydrogen trucks, trains and other carriers.
  • The (re)calibration of Hydrogen Refilling Station (HRS).

Product specifications

  • Signal Inputs

    • Flowmeter Inputs

      • Coriolis Mass Flowmeter Input:
        RS485: Modbus ASCII / RTU
  • Signal Outputs

    • Pulse outputs

      • None.
    • Alarm outputs

      • None.
    • Analog outputs

      • None.
    • Control outputs

      • None.
  • Supply

    • Power Supply

      • 16 – 27V DC.
  • Hazardous Area

    • Non-Sparking, Zone 2

      • ATEX:
        Gas: II 3 G Ex ec IIC T4 Gc
  • Communication

      • Port 2:
        Function: All Metrologically relevant data.
        Protocol: FTL.
        Interface: RS232 / RS485 2-wire or 4-wire.
      • Port 3:
        Function: Metrologically Print receipt.
        Protocol: ASCII.
        Interface: RS232.

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