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Model FT4A Thermal Gas Mass Flow Meter
Brand: Fox Thermal InstrumentsThe Fox Thermal Model FT4A was the first meter to use the expanded Gas-SelectX® gas selection menu and the 3rd Generation DDC-Sensor™ design.
Features- Measures process gas flow rate/total and temperature
- Insertion probes (for 1.5" to 70" pipes); Inline flow bodies with NPT ends (¾" to 3" pipes); Inline 150 lb. & 300 lb. Flanged flow bodies (¾" to 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 RS485 Modbus RTU
- 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
- Insertion & Inline Styles
- DDC-Sensor™ Technology
- Gas-SelectX® Gas Selection Menu
- CAL-V™ Calibration Validation
Specifications
4-20 mA & Pulse Verification
- Simulation Mode used to Align 4-20 mA Output & Pulse Output (If Ordered) with the Input to Customer’s PLC/DCS.
Calibration
- Factory Calibration to NIST-Traceable Standards CAL-V™: in Situ, Operator-initiated Calibration Validation
Enclosure
- NEMA 4, Aluminum, Dual Conduit Entries with 3/4” NPT Female.
Flow Accuracy
- Air: ± 1 % of Reading ± 0.2 % of Full Scale. Other Gases: ± 1.5 % of Reading ± 0.5 % of Full Scale. Accuracy Specification Applies to Customer's Selected Flow Range, Max.
Flow Range
- Inline - Pipe Diameter scfmMSCFDNm³/hour 0.75” (20 mm) 0 - 220 0 - 320 0 - 350 1” (25 mm) 0 - 360 0 -
- Insertion - Pipe Size scfmMSCFDNm³/hour 1.5” (40 mm) 0 - 840 0 - 1,220 0 - 1,325 2” (50 mm) 0 - 1,400 0 - 2,020 0 - 2
Flow Rates
- 15 to 60,000 SFPM (0.07 to 283 NMPS)
Flow Repeatability
- ± 0.2 % of Full Scale
Flow Response Time
- 0.8 seconds (One Time Constant)
Flow Units (Field Selectable)
- scfm, scfh, NMPS, Nm³/M, Nm³/hour, Nm³/D, NLPS, NLPM, NLPH, MCFD, MSCFD, SCFD, MMSCFD, MMscfm, Sm³/M, Sm³/D, Sm³/hour, LB/S, LB/M, LB/H, LB/D, KG/S, KG/M, KG/H, SLPM, SFPM, MT/H
Gas Pressure (Maximum)
- Check with Factory for Higher Pressure Options. NOTE: when Teflon Ferrule Option Ordered, Gas Pressure is 60 psig (4.1 barg) Max.
- Inline - NPT: 500 psig (34 barg) 150 lbs Flanges: 230 psig (16 barg) 300 lbs Flanges: 600 psig (41.4 barg)
- Insertion - w/o Retractor: 740 psig (51.02 barg) with Retractor: 150 psig (10.3 barg)
Input Power
- Input Power: 12 to 28 Vdc, 6 Watts Max. (CE Requirement) Full Input Power Input Range: 10 to 30 Vdc, 6 Watts Max.
Inputs & Outputs
- All Outputs & Communication Circuits are Galvanically Isolated.Standard 4-20 mA Output Proportional to the Flow Rate, Fault Indication Per NAMUR NE43, HART Communication Option.The second Output Can be Ordered for Pulse/alarm or
Installation
- Inline - Compression Fitting Included with Flow Body.
- Insertion - Fox Thermal-supplied Compression Fitting Connects to Customer-supplied 1” Female Coupling Welded to Pipe
Optional Serial Communication
- RS-485 Modbus RTU (when No Pulse Output Has Been Ordered).
Port
- Mini USB Communication Port is Standard.
Relative Humidity
- 90 % Relative Humidity Max.
Retractor Assemblies
- Inline - N/A
- Insertion - 150 psig (10.3 barg) Max.
Sensor Material
- 316 Stainless Steel Standard
Software:
- The Free PC-based Software Tool - FT4A View™ - Provides Complete Configuration, Remote Process Monitoring, & Data Logging Functions.
Straight, Unobstructed Pipe Requirement
- Inline - 8 Diameters Upstream, 4 Downstream.
- Insertion - 15 Diameters Upstream, 10 Downstream.
Temperature
- DDC-Sensor™: -40° to 250° F (-40° to 121° C) Enclosure: -40° to 158° F (-40° to 70° C) *Note: Display Dims Below -4° F (-20° C), Function Returns Once Temperature Rises Againch
Temperature Accuracy
- ± 1° F (± 0.6° C)
Turndown
- Up to 1000: 1, 100: 1 Typical
- Gas Separators
- Power Plants
- VRU (Vapor Recovery Units)
- Green Completions
