Dwyer Gas Mass Flowmeter, Series GFM3
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Series GFM3/GFM4 Gas Mass Flow Meter

Brand: Dwyer Instruments, LLC

The Series GFM3 Gas Mass Flow Meter 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. 

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.
Features
  • 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 5 Vdc, 0 to 10 Vdc, or 4 to 20 mA output signals
  • Set alarms remotely via digital interface for flow, pressure, and temperature to alert user of high or low thresholds being exceeded
  • Programmable 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
  • Standard four button keypad and large 128 x 64 graphical LCD with backlight allows easy access to the many features
  • 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 to alert user of high or low thresholds being exceeded
  • Internal conversion factors for up to 32 gases
  • NIST traceable certificate included
  • Automatic zero adjustment
  • Self-diagnostic tests

Specifications

Brand

Accuracy

  • ± 1 % of Full Scale

Ambient Temperature Range

  • -10° to 50° C (14° to 122° F)

Display

  • 128 x 64 Graphic LCD

Electrical Rating

  • 1 A at 24 Vdc

Filter

  • 5 microns

Load Impedance

  • 3,000 ohms Min.
  • 6,000 ohms Min.

Loop Resistance

  • 500 ohms

Media

  • Gas

NACE & NIST

  • NIST

O-Ring Material

  • Ethylene Propylene (EPR)
  • PTFE

Output

  • 0-10 Vdc
  • 0-5 Vdc
  • 4-20 mA

Power Requirement

  • ± 24 Vdc
  • 12 Vdc
  • 15 Vdc

Repeatability

  • ± 0.25 % of Full Scale

Response Time

  • 0.6 to 1 second

Seat / Seal Material

  • Buna-N
  • Ethylene Propylene (EPR)
  • Fluoroelastomer
  • PTFE

Supply Voltage

  • 110 Vac
  • 15 Vdc Max.
  • 24 Vdc

Temperature Range

  • -10° to 50° C (14° to 122° F) - Dry Gases

Tube Connection

  • 1/4" Compression Fitting
  • 1/8" Compression Fitting
  • 3/8" Compression Fitting

Wetted Materials

  • 316 Stainless Steel
  • 416 Stainless Steel
  • Buna-N
  • Fluoroelastomer

  • Gas Flow Measurement
  • Gas Flow Control
  • Operating Pumps and Valves
  • Process Equipment
  • Vacuum Processes
  • Glass and Metal Coating
  • Film Deposition

Documentation

Catalogs

Manuals

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