Dwyer GFM3 Series Gas Mass Flow Meter and Controllers

Dwyer GFM3 Series Gas Mass Flow Meter and Controllers is an ideal choice for the measurement of flow rates of a wide variety of gases. This digital flow meter features a 12-digit totalizer for total gas volume indication, and is available in the choice of 0 to 5 VDC, 0 to 10 VDC, or 4 to 20 mA output signals.

Dwyer GFM3 Series Gas Mass Flow Meter and Controllers

Standard LCD and four-button keypad allow easy access to the many features of the GFM3. The 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 the digital interface for flow to alert users of high or low thresholds being exceeded. With a high ±1% FS accuracy and ±0.25% FS repeatability, the GFM3 is the optimal choice in gas flow metering and monitoring.

The GFM3 comes with a NIST traceable certificate. Flow Monitoring, Push-Button Configuration. The unit can be calibrated for a variety of gases via push-button with 0-5 VDC, 0-10 VDC or 4-20 mA and relay outputs.

Dwyer GFM3 Series Features

• Multi-drop capability of up to 256 units (for RS-485 option).
• Programmable 12 digit totalizer indicates total gas volume.
• Four button keypad and large 128x64 graphical LCD with backlight.
• Internal conversion factors for up to 32 gases.
• Automatic zero adjustment.
• Self diagnostic tests.
• Free communication software available for download at www.dwyer-inst.com.
• Set alarms remotely via digital interface for flow to alert user of high or low thresholds being exceeded.
• NIST traceable certificate included.
  
  

Application

• Gas Monitoring
• Operating Pumps and Valves
• Process Equipment
• Vacuum Processes
• Glass and Metal Coating
• Film Deposition

Dwyer GFM3 Series Specification

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	Output Signal: Linear 0 to 5 VDC (3000 Ω min. load impedance); 0 to 10 VDC (6000 Ω min. load impedance); 4 to 20 mA (500 Ω 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	500 psia (35 bar).
Leak Integrity	1 x 10-9 smL/sec of helium.
Display	128 x 64 graphic LCD with backlight.
Weight	1 lb (.45 kg).

Download Data Sheet: Series GFM3 Gas Mass Flow Meter and Controllers

Ref: dwyer-inst.com