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Contact Sales Fox Thermal
Fill out the form below to contact a Fox Thermal Representative.
Need to talk to someone immediately, give us a call, 831-384-4300.
Are you sure you want to log out?
The Fox Thermal Velocity Calculator is a helpful tool. Learning how to use a flow velocity calculator can help you determine whether a Fox Thermal Meter is right for your application.
Calculation Results:
Area (Square Feet): —
Velocity (SFPM): —
| Gas Type | (SFPM) | (NMPS) |
|---|---|---|
| Air | 25,000 | 120 |
| Argon | 25,000 | 120 |
| Butane | 25,000 | 120 |
| Carbon Dioxide | 25,000 | 120 |
| Helium | 25,000 | 120 |
| Hydrogen | 25,000 | 120 |
| Methane | 25,000 | 120 |
| Natural Gas | 25,000 | 120 |
| Nitrogen | 25,000 | 120 |
| Oxygen | 25,000 | 120 |
| Propane | 25,000 | 120 |
| 5 - Gas Mix | 25,000 | 120 |
| Gas Type | (SFPM) | (NMPS) |
|---|---|---|
| Air | 60,000 | 283 |
| Ammonia | 54,000 | 255 |
| Argon | 45,000 | 212 |
| Butane | 20,000 | 94 |
| Carbon Dioxide | 60,000 | 283 |
| Ethane | 40,000 | 189 |
| Helium | 30,000 | 141 |
| Hydrogen | 15,000 | 71 |
| Methane | 45,000 | 212 |
| Natural Gas | 45,000 | 212 |
| Nitrogen | 60,000 | 283 |
| Oxygen | 50,000 | 236 |
| Propane | 20,000 | 94 |
| Other Pure or Mix Gas | Contact Fox Thermal |
| Gas Type | (SFPM) | (NMPS) |
|---|---|---|
| Air | 60,000 | 283 |
| Argon | 60,000 | 283 |
| Butane | 60,000 | 283 |
| Carbon Dioxide | 60,000 | 283 |
| Helium | 60,000 | 283 |
| Hydrogen | 60,000 | 283 |
| Methane | 60,000 | 283 |
| Natural Gas | 60,000 | 283 |
| Nitrogen | 60,000 | 283 |
| Oxygen | 60,000 | 283 |
| Propane | 60,000 | 283 |
| Gas Mix | 60,000 | 283 |
| O&G Gas Mix | 60,000 | 283 |
Vortex Shedding Flow Meters - Measures Gas, Liquid, and Saturated Steam
| Fluid Type | Min Velocity | Max Velocity |
|---|---|---|
| Liquids | 1 ft/sec (0.3 m/sec) | 30 ft/sec (9.1 m/sec) |
| Gases & Steam | Fluid dependent* | 300 ft/sec (91 m/sec) |
VF4 Inline - Gas/Steam Max Velocity by Pipe Size:
| Pipe Size | Max Velocity (ft/sec) | Max Velocity (m/sec) |
|---|---|---|
| 0.5 inch (15 mm) | 175 | 53 |
| 0.75 inch (20 mm) | 250 | 76 |
| 1 inch (25 mm) | 250 | 76 |
| 1.5 inch (40 mm) | 300 | 91 |
| 2 inch (50 mm) and larger | 300 | 91 |
*Minimum velocity for gases is fluid dependent and calculated based on Reynolds number of 5000. Consult factory for sizing.
Rangeability up to 100:1. VF3 insertion meters for pipe sizes 2" and greater. VF4 inline meters from 0.5" to 12".
Copyright © 2025
Fox Thermal | 399 Reservation Rd. | Marina, CA 93933 | (831) 384-4300 | www.foxthermal.com
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Contact Fox Thermal
Fill out the form below to contact a Fox Thermal Representative.
Need to talk to someone immediately, give us a call, 831-384-4300.