• Very low-pressure drop
  • Longer lifetime when used on corrosive gases
  • Lower contamination risk
  • Easy to clean
  • Electro-polished stainless steel wetted parts
  • Available with a control valve to constitute a complete, compact control loop
  • Available with industrial (IP65 weatherproof) housing with optional ATEX Zone 2 Cat. 3 or FM Class I, Div. 2 approval.


For Low-Pressure Drop Or Corrosive Gas Service

For applications with only little differential pressure, Bronkhorst developed the LOW-ΔP-FLOW series mass flow meters and controllers. In these instruments, the flow resistance is minimized by a different sensor and by-pass construction.

  • Lowest range 0,2…10 mln/min
  • Highest range 20…1000 m3nh


  • Environmental air sampling at atmospheric conditions
  • Leak rate tests
  • Gas consumption measurement, for example of natural gas, in low-pressure gas distribution systems
  • Burner control

Control of mass flow with small pressure differences

The control of mass flow with small pressure difference comprises the LOW-ΔP-FLOW Mass Flow Controller in compact construction; the control valve and flow meter are integrated into one body. The maximum flow in these compact models is 1…50 ln/min Air, depending on the operating conditions. For the control of higher flow rates at very low differential pressures, Bronkhorst has devised special control valves with pressure compensation bellows (types F-004AC/F-004AI/F-004BI). These control valves are piped on to the flow meter while the electronic PI-control function is an integral part of the flow meter.

“Multibus” Digital Mass Flow Meters/Controllers

Bronkhorst developed their digital instruments according to the flexible “multibus” concept, due to which the instruments can be equipped with on-board interface board with CANopen®, DeviceNet™, EtherCAT®, PROFIBUS DP, PROFINET, Modbus RTU, ASCII or TCP/IP, EtherNet/IP or FLOW-BUS protocol. More information about digital “multibus” communication.