High Flow Mass Flow Controller, Kelly Pneumatics

Featured Product from Kelly Pneumatics, Inc.

High Flow Mass Flow Controller
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.


  • Linearized Flow Output 
  • +-1% 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


Input Pressure 0 to 200 PSI
Gas/Back Pressure 0 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 Time Typical: 50-80 milliseconds
Custom: 20-30 milliseconds
Max Flow Rate 300 slpm @ 100 psi Differential Pressure
Connections 1/8" or 1/4" FPT Supply and Outlet Ports
Weight 1.0 lb
Power Required 12 or 24 VDC (Wire Leads); 110 VAC (Turnkey)
Current Required 90 mA to 180 mA
Control Signal 0-5 volts, 0-10 volts or 4-20 mA
Feedback Signal 0-5 or 0-10 volts
Manual Control Adjustable Potentiometer
Operating Temp. 32-150 °F or 0-65 °C
Filtration 40 Micron Recommended
Wetted Materials Cold rolled stainless steel w/ electroless
nickel plating, brass and 304 stainless steel.
Wiring Details

* Omitted for Turn-Key Power Supply option


Terminal Number 1* 2 3 4
Lead Wire Color Brown White Blue Black
Function Power Supply Voltage Control Signal Ground Feedback Signal