High Flow Mass Flow Controller


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  • Linearized Flow Output 
  • +-0.5% Full Scale Accuracy, or +-2% Reading *
  • 20-30 Millisecond Response time
  • Back Pressure Compensation up to 100 psig
  • Temperature Compensating
  • Microcontroller Design for Customization

  *See flow specifications below

Kelly Pneumatics, Inc. offers a reduced cost, single or dual-valve design, Mass Flow Controller for high volume flow applications. The unit is calibrated for up to +-1% accuracy (full scale) for flow rates of 0-300 lpm. For greater accuracy, the unit can be customized to +-2% of reading, for flow rates above 2.5 lpm. This mass flow controller can also adjust for back pressures of up to 100 psig, as well as compensate for changes in gas temperature. The controller can also be customized for response times of up to 20 milliseconds (full scale). This unit can accurately control numerous gases, including Air, Oxygen, Nitrogen, Argon, and many more.

Further customization is possible due to an internal microcontroller. Change your response time, control range, or incorporate additional control or feedback signals, with customized software, modified to meet your most demanding flow control applications.


Input Pressure0 to 200 PSI (standard)
500 psig (custom)
Gas/Back Pressure0 to 100 PSIG
Flow Output Accuracy+/- 1% Full Scale accuracy, or 0.05 lpm, whichever is greater.
+/- 2-3% of Reading is available with custom calibration.
Results dependent on application specifications
Response TimeTypical: 50-80 milliseconds
Custom: 20-30 milliseconds
Max Flow Rate300 slpm @ 100 psi Differential Pressure
Connections1/8" or 1/4" FPT Supply and Outlet Ports
Weight1.0 lb
Power Required12 or 24 VDC (Wire Leads); 110 VAC (Turnkey)
Current Required90 mA to 180 mA
Control Signal0-5 volts, 0-10 volts or 4-20 mA
Feedback Signal0-5 or 0-10 volts
Manual ControlAdjustable Potentiometer
Operating Temp.32-150 °F or 0-65 °C
Filtration40 Micron Recommended
Wetted MaterialsCold rolled stainless steel w/ electroless
nickel plating, brass and 304 stainless steel.

Wiring Details


* Omitted for Turn-Key Power Supply option

Terminal Number1*234
Lead Wire ColorBrownWhiteBlue Black
FunctionPower Supply VoltageControl SignalGroundFeedback Signal



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