337 Highlandia Drive Baton Rouge, LA 70810 1.800.299.4142 [email protected]


Model FT4A


The Model FT4A is calibrated with NIST traceable standards and includes our 2nd Generation DDC-Sensor™, CAL-V™ Calibration Validation, and HART or RS485 Modbus options. The Model FT4A is suitable for Industrial, Wastewater and Oil & Gas applications. The Gas-SelectX™ gas menus have been updated to include all upstream flare and vent gases (C1-C9+) required by BLM regulations and API standards.

The Fox Thermal Model FT4A was the first meter to use the expanded Gas-SelectX® gas selection menu and the 3rd Generation DDC-Sensor™ design.

Key Features:

Insertion & Inline Styles

DDC-Sensor™ Technology

Gas-SelectX® Gas Selection Menu

CAL-V™ Calibration Validation

Scroll down for more features/benefits!


Gas Separators

Power Plants

VRU (Vapor Recovery Units)

Green Completions

Common Features for Fox Thermal Model FT4A Flow Meter:

  • Measures process gas flow rate/total and temperature
  • Insertion probes (for 1.5″ – 70″ pipes); Inline flow bodies with NPT ends (¾” – 3″ pipes); Inline 150 lb. & 300 lb. Flanged flow bodies
  • (¾” – 6″ pipes)
  • Equipped with the 2nd Generation DDC-Sensor™ (Direct Digitally Controlled)
  • Gas-SelectX® expanded gas selection menu. Choose from available list of gases/gas mixes to measure flow. NIST-traceable calibration
  • One standard 4-20mA output proportional to mass flow rate; HART communication option
  • Second output can be ordered for pulse/alarm or Modbus RTU (RS485)
  • Optional on-board display and configuration panel
  • Click the Approvals tab for Model FT4A Agency Approvals.
  • Calibration Validation with the CAL-V™ feature.
  • A USB connection is standard (free FT4A View™ Software)
  • Wide measurement range
  • Flow Accuracy for air: ±1% R ±0.2% FS; Flow accuracy for other gases: ±1.5% R ±0.5% FS
  • 10-30 VDC in local enclosures

Learn about other Thermal Gas Mass Flow Meters available at BBP.

Additional information


Chemical, Engineering, Food & Beverage, Oil & Gas, Pharmaceutical, Power Generation, Pulp & Paper, Refining, Water & Wastewater


Fox Thermal