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Series GFM4 Gas Mass Flow Meter

Series GFM4

The Series GFM4 Gas Mass Flow Meter is an ideal choice for the measurement of flow rates of a wide variety of gases. This multi parameter flow meter supports various functions such as flow totalizer, flow, temperature, and pressure alarms, and is available in a choice of 0 to 5VDC, 0 to 10VDC, or 4 to 20 mA output signals. Standard LCD and four button keypad allows easy access to the many features of the GFM4. Digital interface operates through available RS-485 or RS-232, providing access to internal data parameters and multi-drop capability of up to 255 units (RS-485 only). Set alarms remotely via digital interface for flow, pressure, and temperature to alert user of high or low thresholds being exceeded. With a high ±1% FS accuracy and ±0.25% FS repeatability, the GFM4 is the optimal choice in gas flow metering and monitoring. The GFM4 comes with a NIST traceable certificate.

  • Service:Clean gases compatible with wetted parts.
  • Wetted Materials:316 SS, 416 SS; Fluoroelastomer, Buna-N, EPR or PTFE O-rings.
  • Accuracy:±1% FS.
  • Repeatability:±0.25% FS.Response Time:0.6 to 1.0 s to within ±2% of setpoint over 20 to 100% FS.Output Signal:Linear 0 to 5 VDC (3000 ? min. load impedance); 0 to 10 VDC (6000 ? min. load impedance); 4 to 20 mA (500 ? max loop resistance).
  • Relay Rating:1 amp @ 24 VDC.Max Particulate Size:5 microns.
  • Temperature Limits:Ambient: 32 to 122°F (0 to 50°C); Dry Gases: 14 to 122°F (-10 to 50°C).
  • Power Supply:12 VDC; ±15 VDC; 24 VDC.Process Connections:1/8" compression fitting for flow rates ? 10 L/min; 1/4" for ? 50 L/min; 3/8" for ? 100 L/min.
  • Pressure Limits: 200 psia (13.79 barA).
  • Leak Integrity:1 x 10-9 smL/sec of helium.
  • Display:128 x 64 graphic LCD with backlight.
  • Weight:1 lb (.45 kg).


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