IN-FLOW - Industrial style
(IP65) Mass Flow Meters / Controllers for gases


IN-FLOW Series Mass Flow Meters/Controllers are thermal mass flow meters of modular construction with a 'industrial style' pc-board housing. Control valves can either be integrally or separately mounted, to measure and control gas flows from:

lowest range 0,014 ... 0,7 mln/min
up to highest range  8 ... 1670 ln/min

The control valve design distinguishes itself from competitive designs in its truly modular construction and it can be field replaced or changed by the user without any adjustment. The standard valve is normally closed and is available up to Kv-values of 6.0. Normally opened valves can also be supplied.

For high (differential) pressure applications, patented constructions enable us to handle high flows and/or pressures at differential pressures up to 700 bar in the IN-FLOW program, a capability which is unique in the market place. More info about high pressure mass flow meters/controllers.

Digital = Standard

All models of the IN-FLOW series are equipped with a digital pc-board, featuring self-diagnostics, alarm and counter functions, digital communication and remotely adjustable control settings. These digital instruments from Bronkhorst offer great flexibility thanks to the "multibus" concept, whereby the instruments can be equipped with an on-board interface with DeviceNetTM, PROFIBUS DP, PROFINET, Modbus-RTU or FLOW-BUS protocol. More information about digital "multibus" communication.

Optional Multi Gas / Multi Range

These new instruments with Multi Gas / Multi Range (MG/MR) functionality offer greater flexibility for user selection of both flow ranges and gas types, maintaining high accuracy and turndown range for measurement and control. Thanks to this feature users of the IN-FLOW series can rescale their instruments on site, saving time (and money) for mounting and dismounting. For the convenience of the user, Bronkhorst has developed an easy-to-use software tool called "FlowTune" for changing the configuration of IN-FLOW instruments with activated Multi Fluid / Multi Range option (to be specified at the moment of ordering).

inflow select with gaseseweb

  • Features
  • Applications
  • Flow capacities
  • Documentation


  • High accuracy (standard 0,5% of Rd plus 0,1% of FS)
  • Rangeability in digital mode up to 187,5 : 1
  • Optional Multi-Gas / Multi-Range functionality: freely programmable ranges and gas types
  • Pressure rating 64 /100 bar (Multi-Gas / Multi-Range functionality up to 10 bar)
  • High pressure versions available (up to 700 bar)
  • Rugged, weatherproof housing (IP65, dust and waterproof)
  • Options: ATEX approval for Zone 2 / FM approval for Class I Div. 2
  • Analog or digital communication (RS232 or fieldbus interface)
  • High flow versions available (up to 11000 m3n/h)


  • Process gas measurement in food industry, chemical and petrochemical industries, in fermentation installations and in biotechnology
  • Sample gas measurement in environmental analysis
  • Gas consumption measurement for internal accounting
  • Systems for environmental air sampling
  • Hydrogen techniques
  • Burner control

Flow capacities (based on air)

Mass Flow Meter (MFM)


Series F-110CI min. 0,014 ... 0,7 mln/min
max. 0,06 ... 9 mln/min
Series F-111BI min. 0,16 ... 8 mln/min
max. 0,16 ... 25 ln/min
Series F-111AI min. 0,4 ... 20 ln/min
max. 0,6 ... 100 ln/min
Series F-112AI min. 0,8 ... 40 ln/min
max. 1,4 ... 250 ln/min
Series F-113AI min. 4 ... 200 ln/min
max. 8 ... 1670 ln/min

Mass Flow Controller (MFC)


Series F-200CI 1) min. 0,014 ... 0,7 mln/min
max. 0,06 ... 9 mln/min
Series F-201CI 1) min. 0,16 ... 8 mln/min
max. 0,16 ... 25 ln/min
Series F-201AI 1) min. 0,4 ... 20 ln/min
max. 0,6 ... 100 ln/min
Series F-202AI 2) min. 0,8 ... 40 ln/min
max. 1,4 ... 250 ln/min
Series F-203AI 2) min. 4 ... 200 ln/min
max. 8 ... 1670 ln/min

1) with small type of valve for normal applications
2) with pilot-operated valve for high flow applications; MG/MR option not yet available for these models


For more info see brochure "IN-FLOW mass flow meters/controllers for gases"

F-201CI Mass Flow Controller, IP65 and ATEX Zone 2 protected F-202AI Mass Flow Controller F-111BI Mass Flow MeterF-112AI Mass Flow Meter F-113AI Mass Flow MeterIN-FLOW F-242MI Mass Flow Controller, PN700
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