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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?
Toggle through the tabs below to view comparison tables that highlight the features and capabilities of the technologies and the product series available from Fox Thermal. To learn more details, click on the images along the top of the tables.
| Category | Feature | Thermal Mass | Vortex Shedding |
|---|---|---|---|
| MEASUREMENT | Volumetric flow | ||
| Mass flow | |||
| Temperature | |||
| Pressure | |||
| Energy | |||
| Density | |||
| FLUID TYPE | Steam | ||
| Gases | |||
| High-viscosity liquids | |||
| Low-viscosity liquids | |||
| Conductive liquids | |||
| Non-conductive liquids | |||
| PROPERTIES | Low pressure loss |
Visit our Thermal Mass flow meter page or our Vortex Shedding flow meter page for more information on the benefits of these technologies for your application.
Toggle through the other tabs to compare products in each series.
| Specification | FT1 | FT2A | FT3 | FT4A | FT4X |
|---|---|---|---|---|---|
| METER TYPE/ LINE SIZE |
Insertion: 1.5" - 70" Inline: (with flow conditioners) ¾"-6" |
Insertion: 1.5" - 70" Inline: (with flow conditioners) ½" - 6" Remote sensor mounting optional |
Insertion: 1.5" - 70" Inline: (with flow conditioners) ½" - 6" Remote sensor mounting optional |
Insertion: 1.5" - 70" Inline: (with flow conditioners) ¾"-6" |
Insertion: 1.5" - 70" Inline: (with flow conditioners) ¾"-6" Remote sensor mounting optional |
| OUTPUTS | 4-20mA; Selection of one 2nd channel:
|
2 X 4-20mA; Pulse/Alarm |
2 X 4-20mA; Pulse/Alarm |
4-20mA; Selection of one 2nd channel:
|
2 X 4-20mA; Pulse/Alarm |
| COMMUNICATION OPTIONS | USB (Standard); Modbus RTU (RS485); BACnet MS/TP (RS485); HART |
USB (Standard); Modbus RTU (RS485); BACnet MS/TP (RS485); Profibus-DP; DeviceNet; Ethernet Modbus TCP |
USB (Standard); Modbus RTU (RS485); HART |
USB (Standard); Modbus RTU (RS485); HART |
USB (Standard); Modbus RTU (RS485); HART |
| REMOTE SWITCH INPUT | None | Contact input to reset total | Contact input to reset total | None | Contact input to reset total |
| DATA LOGGER | None | None | Optional; with date/time stamp | None | Standard data logger with date/time stamp; 24 Hour Log, Config Log, Event Log, BLM Log, 7-year history, power off totalizer Click here to read more |
| CALIBRATION VALIDATION (in-situ verification) |
CAL-V™ | None | CAL-V™ Zero CAL-CHECK® |
CAL-V™ | CAL-V™ |
| POWER | 12-24VDC | 24VDC; 100-240VAC |
24VDC; 100-240VAC |
12-24VDC | 12-24VDC; 100-240VAC |
| DISPLAY | (Optional) 2-Lines x 16 characters Backlit |
(Standard) 2-Lines x 16 characters Backlit |
(Optional) 2-Lines x 16 characters Backlit Infrared buttons |
(Standard) 2-Lines x 16 characters Backlit |
(Standard) 2-Lines x 16 characters Backlit |
| GAS SELECT MENU | Pure Gas Menu (12) Mixed Gases (Mix 5 of 11) |
None | None | Pure gas Menu (14) Mixed Gas Menu (any of 13) O&G Menu (any of 14) |
Pure gas Menu (14) Mixed Gas Menu (any of 13) O&G Menu (any of 14) |
| GAS/GAS MIXES | Air Argon Butane Carbon Dioxide Helium Click here for more gas options* |
Extensive Dry pure gases, Gas mixes (gas composition analysis must be submitted for factory calibration) |
Extensive Dry pure gases, Gas mixes (gas composition analysis must be submitted for factory calibration) |
Air Argon Butane Carbon Dioxide Helium Click here for more gas options* |
Air Argon Butane Carbon Dioxide Helium Click here for more gas options* |
| SENSOR | DDC-Sensor™ ¾" probe |
PowerPro™ Sensor ½" probe |
PowerPro™ Sensor ½" probe |
DDC-Sensor™ ¾" probe |
DDC-Sensor™ ¾" probe |
| FREE SOFTWARE DOWNLOADS | Yes - FT1 View™ | Yes - FT2A View™ | Yes - FT3 View™ | Yes - FT4A View™ | Yes - FT4X View™ |
| ACCURACY | ±1% R ±0.2% FS (air) ±1.5% R ±0.5% FS (all other gases) |
±1% R ±0.2% FS | ±1% R ±0.2% FS | ±1% R ±0.2% FS (air) ±1.5% R ±0.5% FS (all other gases) |
±1% R ±0.2% FS (air) ±1.5% R ±0.5% FS (all other gases) |
| VELOCITY RANGE | 0 - 25,000 SFPM; 0 - 120 NMPS |
0 - 60,000 SFPM; 0 - 283 NMPS |
0 - 60,000 SFPM; 0 - 283 NMPS |
0 - 60,000 SFPM; 0 - 283 NMPS |
0 - 60,000 SFPM; 0 - 283 NMPS |
| SENSOR TEMPERATURE RATINGS | -40° to 250°F (-40° to 121°C) | ST: -40° to 250°F (-40° to 121°C) HT: -40° to 650°F (-40° to 343°C) |
ST: -40° to 250°F (-40° to 121°C) HT: -40° to 650°F (-40° to 343°C) |
-40° to 250°F (-40° to 121°C) | -40° to 250°F (-40° to 121°C) |
| MAXIMUM PRESSURE | 740 psig (51 barg)** | 500 psig (34 barg)** | 500 psig (34 barg)** | 740 psig (51 barg)** | 740 psig (51 barg)** |
| APPROVALS | CE Mark*** FM/FMc Class I Div 1*** ATEX/IECEx Zone 1*** |
CE Mark*** FM/FMc Class I Div 2*** |
CE Mark*** FM/FMc Class I Div 1*** ATEX/IECEx Zone 1*** |
CE Mark*** FM/FMc Class I Div 1*** ATEX/IECEx Zone 1*** |
CE Mark*** FM/FMc Class I Div 1*** ATEX/IECEx Zone 1*** |
*For the FT1, a gas mix can contain any five of the gases listed in any proportion totaling 100%. For FT4A/FT4X products, any number of gases from the gas mix and O&G gas menus may be mixed in any proportion totaling 100%.
**Maximum Pressure rating (100°F) depends on end connections, materials, and retractor options. For detailed pressure ratings, click product images above to view full features and specs.
***To view more specific information on product approvals see Model Datasheets or Product pages by clicking on product images above.
| Specification | VF3 | VF4 |
|---|---|---|
| METER TYPE | Insertion Insertion (with hot tap option) |
Inline Inline Reduced-bore |
| LINE SIZE | >2" pipes | Inline: 0.5" (15mm) to 12" (300mm) Inline reduced-bore: 0.75" (20mm) x 0.5" (15mm) to 12" (300mm) x 10" (250mm) |
| REMOTE ELECTRONICS OPTION | Yes | Yes |
| CONNECTION OPTIONS |
|
|
| OUTPUTS |
|
|
| COMMUNICATION OPTIONS |
|
|
| POWER | DC or AC | DC or AC |
| DISPLAY | (Standard) 2-Lines x 16 characters LCD digital |
(Standard) 2-Lines x 16 characters LCD digital |
| ACCURACY |
|
|
| PROCESS TEMPERATURE RATINGS |
|
|
| MAX. PRESSURE | Up to 1,500 psig | Up to 1,500 psig |
| APPROVALS | CE Mark FM/FMc Class I Div 1 ATEX/IECEx Zone 1 |
CE Mark FM/FMc Class I Div 1 ATEX/IECEx Zone 1 |
To view more specific information on product approvals see Model Datasheets or Product pages by clicking on product images above.
Copyright © 2025
Fox Thermal | 399 Reservation Rd. | Marina, CA 93933 | (831) 384-4300 | www.foxthermal.com
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