Model 2021 FG/FGS/FS

Flow Meter

  • Up to 3,000 psig line pressure
  • Available in gauge only, gauge-switch combo, and switch only versions

Specifications: 2021 Flow FM Gauges

Model 2021 PDF Downloads: Specifications | Instructions | Drawing


Flow Range

Max Line Pressure

Max Line Temperature


Electrical Availability

2021 FG/FGS/FS

GPH 0-2 to 0-40
GPM 0-0.04 to 0-0.8
LPH 0-8 to 0-150
LPM 0-0.14 to 0-2.5
SCFH 0-300 to 0-480
SCFM 0-5 to 0-8
SLPM 0-140 to 0-225
Nm3/hr 0-8 to 0-14

3000 psig
(200 bar)

200°F (93°C)

Liquids 2%
Air 5%

1 or 2 Switches
No Enclosure

How To Order

Select from each of the applicable categories to construct a model number, and configure your instrument. Click the button to request a quote or for more information. If you are reordering you must supply the Part Number from your instrument label. Contact Orange Research or local Orange Research distributors for additional options and pricing information. Please Note: Other Ranges and Measurement Units are available than appear below; specify your needs in the comments box below.


Sample configuration: Gauge (w/ switch option): 2021FGS-1A-2.5B-A-0-5GPM-W, PL, switch set to close at 4 GPM asc.
Fields with * are Required.

Buna is Standard
Generate Part #
Please note: Standard water or air calibration shown above. For Special Calibration: for Liquids - provide SG & V; for Gas - provide gas type, pressure & temperature.

Popular Options

We can customize parts to your specific needs, with features including:

• Red Arc
• Liquid Filled
• Follower Pointer
• Flanged Dial Case
• … and more

More Options →

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Photos: Flow Gauge

2021 Family

2021 Front

2021 Back

WARNING: Some of our products contain Nickel, a chemical known to the State of California to cause cancer. For more information go to:

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