Fox Thermal Model FT1 Thermal Mass Flow Meter & Temperature Transmitter
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
Maximum range: 15-25,000 SFPM (0.07-120 NMPS)
Minimum range: 15-500 SFPM (0.07-2.36 NMPS)
Straight, unobstructed pipe requirement:
15 diameters upstream; 10 downstream.
8 diameters upstream; 4 downstream.
Flow Repeatability:
± 0.2% of full scale
Flow Response Time:
0.8 seconds (one time constant)
Temperature Accuracy:
± 1° F (± 0.6° C)
Calibration:
Factory Calibration to NIST-traceable standards
Zero CAL-CHECK®: In situ, operator-initiated calibration validation
Flow Units (field selectable):
SCFM, SCFH, NMPS, NM3/M, NM3/H, NM3/D, NLPS, NLPM, NLPH, MCFD, MSCFD, SCFD, MMSCFD, MMSCFM, SM3/M, SM3/D, SM3/H, LB/S, LB/M, LB/H, LB/D, Kg/S, Kg/M, Kg/Hr, SLPM, SFPM, MT/H
Flow Rates:
15 to 25,000 SFPM (0.07 to 120 NMPS)
Turndown:
up to 1000:1; 100:1 typical
Flow Ranges:
| Pipe Size |
SCFM |
NM³/HR |
| 0.75" (20 mm) |
0 - 93 |
0 - 146 |
| 1" (25 mm) |
0 - 150 |
0 - 237 |
| 1.25" (32 mm) |
0 - 260 |
0 - 410 |
| 1.5" (40 mm) |
0 - 354 |
0 - 558 |
| 2" (50 mm) |
0 - 538 |
0 - 920 |
| 2.5" (63 mm) |
0 - 830 |
0 - 1,200 |
| 3" (80 mm) |
0 - 1,280 |
0 - 2,020 |
| 4" (100 mm) |
0 - 2,210 |
0 - 3,480 |
| 6" (150 mm) |
0 - 2,500 |
0 - 3,950 |
Note: To determine if the FT4A will operate accurately in other pipe sizes, divide maximum flow rate by the pipe area. The application is acceptable if the resulting velocity is within the velocity range above.
Note: Consult factory for flow ranges above those listed. Inline meters above 5,000 SCFM (7,900 NM3/H) air may require third party calibration.
Gas Pressure (max):
300 psig (20.7 barg)
NPT: 300 psig (20.7 barg)
150 lb. Flanges: 230 psig (16 barg)
Check with factory for higher pressure options.
NOTE: When teflon ferrule option ordered, gas pressure is 60psig (4.1 barg) maximum.
Relative Humidity:
90% RH maximum; non-condensing
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 again.
Input Power:
Input power: 12 to 28VDC, 6 watts max. (CE requirement)
Full input power input range: 10 to 30VDC, 6 watts maximum.
Inputs/Outputs
- All outputs and communication circuits are galvanically isolated.
- Standard 4-20mA output proportional to the flow rate; fault indication per NAMUR NE43; HART communication option.
- Second output for pulse, RS485 Modbus RTU, or BACnet MS/TP.
- Isolated pulse output: 5 to 24VDC, 10mA max, 0 to 100Hz for flow.
- The pulse output can be used as an isolated sold state output for alarms.
Port:
Mini USB communication port is standard.
Software:
The free PC-based software tool - FT1 View™ - provides complete configuration, remote process monitoring, and data logging functions.
Optional serial communication:
RS485 Modbus RTU or BACnet MS/TP (when no pulse output has been ordered).
4-20mA and Pulse Verification:
Simulation mode used to align 4-20mA output and pulse output (if ordered) with the input to customer’s PLC/DCS.
Sensor Material:
316 stainless steel standard.
Enclosure:
NEMA 4, Aluminum, dual conduit entries with ¾" FNPT.
Retractor Assemblies:
150 psig (10.3 barg) max.
N/A
Installation:
Fox Thermal-supplied compression fitting connects to customer-supplied 1" female coupling welded to pipe.
Compression fitting included with flow body.