Series GFM3 Gas Mass Flow Meter

Specifications

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).

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 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

Drawings

• CAD Drawing in format .DWG
• Adobe Reader in format .PDF

Model Chart

Questions

Question

What is the difference between a Gas Mass Flow Meter to a Gas Mass Flow Controller?

Answer

The major difference between the GFM and the GFC is the that GFM is just used to measure the flow going through the meter. The GFC has the added feature of a electromagnetic valve to control the flow to a desired set rate. Our newer GFM flowmeters (GFM2, GFM3, and GFM4) have some added features to the base GFM unit, such as optional relays, push button configuration, and pressure and temperature monitoring, respectively.

Related

Series GFM2

Series GFM4

Series GFM3

Series GFM

Series GFC