IN-FLOW CTA - Industrial style
Direct Mass Flow Meters/Controllers for gases


IN-FLOW CTA Series Mass Flow Meters/Controllers are modular instruments of rugged design according IP65 (dust- and waterproof). They can be combined with integrated or close-coupled control valves to form compact digital Mass Flow Controllers, whereby flow ranges are measured and controlled from

lowest range 10 ... 200 mln/min
up to highest range  50 ... 5000 ln/min

Through-flow measurement

Mass Flow Meters of the IN-FLOW CTA series work on the basis of direct through-flow measurement (no by-pass), following the constant temperature anemometer principle. The instruments contain no moving parts and have no obstructions to the flow path, which makes them ideal for low pressure drop applications and virtually insensitive to moisture or particulates.

Flow control

The control valve can be furnished as an integral part of a mass flow controllers or as a separate component. It is a proportional, electro magnetic control valve with fast and smooth flow control characteristics. With reference to the specific fields of application there are different series of unique Bronkhorst® control valves, for high or low flow, for high or low pressure difference. The standard valves are normally closed and are available up to Kv-values of 6.0. Normally opened valves can also be supplied.

Digital = Standard

The instruments have analog I/O-signals and also an RS232 connection as a standard feature. In addition to this there is the possibility of integrating an interface board with DeviceNet™, Profibus-DP®, Modbus or FLOW-BUS protocol. The basic pc-board features integrated PID Control and various alarm and diagnostic functions. More information about digital "multibus" communication.

  • Features
  • Applications
  • Flow capacities
  • Documentation


  • Virtually insensitive to moisture or particulates
  • Low pressure drop
  • Accuracy: 1% of FS plus 1% RD 
  • Rangeability up to 1 : 100
  • Rugged, weatherproof housing (IP65, dust and waterproof)
  • Option: ATEX approval for Zone 2
  • Analog or digital communication (RS232 or fieldbus interface)


  • 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
  • Methane production in anaerobic digesters
  • Surface treatment
  • Test benches

Flow capacities (based on air)

Mass Flow Meter (MFM)


Series T10 min. 0,01 ... 0,2 ln/min
max. 0,02 ... 2 ln/min
Series T11 min. 0,02 ... 1 ln/min
max. 0,05 ... 5 ln/min
Series T12 min. 0,1 ... 5 ln/min
max. 0,5 ... 50 ln/min
Series T13 min. 0,4 ... 20 ln/min
max. 4 ... 200 ln/min
Series T14 min. 2 ... 100 ln/min
max. 10 ... 1000 ln/min
Series T15 min. 10 ... 500 ln/min
max. 50 ... 5000 ln/min

Mass Flow Controller (MFC)


Series T20 (Kv-max 6.6E-2) min. 0,01 ... 0,2 ln/min
max. 0,04 ... 2 ln/min
Series T21 (Kv-max 6.6E-2) min. 0,02 ... 1 ln/min
max. 0,1 ... 5 ln/min
Series T22 (Kv-max 6.6E-2) min. 0,1 ... 5 ln/min
max. 1 ... 50 ln/min
Series T23 (Kv-max 3.5E-1) min. 0,4 ... 20 ln/min
max. 4 ... 200 ln/min

Typical combinations of Mass Flow Meters with close coupled Control Valves


T13 + F- 002AI up to 4 ... 200 ln/min;
Kv-max. 0,4
T13 + F- 004AI up to 4 ... 200 ln/min;
Kv-max. 0,3
T14 + F- 003AI up to 20 ... 1000 ln/min;
Kv-max. 1,5
T14 + F- 004BI up to 20 ... 1000 ln/min;
Kv-max. 1,0
T15 + F- 003BI up to 100 ... 5000 ln/min;
Kv-max. 6,0

T12 Mass Flow MeterT21 Mass Flow ControllerT13 Mass Flow MeterT23 Mass Flow ControllerT14 Mass Flow MeterT15 Mass Flow Meter
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