Fox Model FT4A Thermal Gas Mass Flow Meter

The Fox Model FT4A was the first meter to use the expanded Gas-SelectX® gas selection menu and the 2nd Generation DDC-Sensor™ design.

The Model FT4A measures gas flow rate in standard units (SCFM, NM³/hr, LBS/HR, KG/HR & many more) without the need for temperature and pressure compensation.

A free software tool – FT4A View™ - is available for the Model FT4A that allows the user to connect to and configure the FT4A using a PC or laptop.

Explore the links to the right to learn about the new advanced features available on the Model FT4A.


The free FT4A View™ software from Fox is a great way to connect to the Model FT4A from a PC or laptop to access the meter settings in a quick and visually appealing way. This software offers:

  • Quick access to all configuration parameters using pop-up windows and pull down menus
  • Selection of measurement units, flow and temperature ranges, alarm settings, and more
  • Gas-SelectX® Gas Selection Menu
  • CAL-V™ Calibration Validation Certificate
  • Data Logging to a Microsoft® Excel spreadsheet
  • Display of alarm codes
  • Storage of meter configurations to a file that can be archived
  • View raw data that can be used to diagnose or troubleshoot your meter

Note: For FT4A View™ software to function, please be sure to have a working version of Microsoft® Office installed on the PC before installing FT4A View™.

USB Driver and the Fox FT4A View™ Software
A USB driver is needed for FT4A View™ to run. If the USB drive does not install automatically, you will need to download it by following this link. Instructions are included on how to install it correctly.


The CAL-V™ test is used for Calibration Validation on the Model FT4A. This test does the following:

  • Tests the functionality of the sensor and its associated signal processing circuitry
  • Checks for build-up on sensor that could affect calibration
  • Ensures that the meter still retains its original NIST-traceable calibration at zero flow
  • Checks thermal conductivity (heat transfer) repeatability of the sensor

Use this test according to the manufacturer’s instructions in order to validate the calibration of the meter.


Configure the FT4A

The Gas-SelectX® feature is a revolutionary new feature that allows the user to have a meter capable of measuring more than 10 different gases accurately. The user can choose from the list of gases below or mix any to create a custom gas mix specifically for their application! Every FT4A flowmeter is pre-calibrated for:

Pure Gas Menu

  • Air
  • Argon
  • Butane
  • Carbon Dioxide
  • Helium
  • Hydrogen
  • Methane
  • Natural Gas*
  • Nitrogen
  • Oxygen
  • Propane

Mixed Gas Menu

  • Air
  • Argon
  • Butane
  • Carbon Dioxide
  • Ethane
  • Helium
  • Hydrogen
  • Methane
  • Nitrogen
  • Oxygen
  • Propane

Oil & Gas Menu

  • Methane (C1)
  • Ethane (C2)
  • Propane (C3)
  • Iso Butane (C4)
  • Normal Butane (C4)
  • Pentanes (C5)
  • Hexanes (C6)
  • Heptanes (C7)
  • Octanes (C8)
  • Nonanes+ (C9+)
  • Carbon Dioxide
  • Nitrogen

The Gas Mixes are programmable in 1% increments and up to three of the gases listed above can be mixed. The Gas-SelectX® feature can be accessed through the front panel of the meter or by using the free FT4A View™ software tool.

*Natural gas refers to pipeline-quality dry natural gas, whereas naturally occurring gas from oil fields constitutes a special mixed gas requiring a special calibration. This gas not available for gas mixes. Contact Fox for further information.


Gas-SelectX® Datasheet
Configure the FT4A

More Info

Common Features for Fox Model FT4A Flow Meter:

  • Measures process gas flow rate/total and temperature
  • Insertion probes: for 1.5" to 70" 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
  • One output is selectable 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
PLEASE TURN YOUR DEVICE TO LANDSCAPE ORIENTATION.

FT4A Flow Meter Specs

Technical Specifications
Fox Model FT4A Thermal Mass Flow Meter & Temperature Transmitter
Performance Specs
Type
Insertion
Inline
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: 15-60,000 SFPM (0.07-283 NMPS)
Minimum range: 15-1,000 SFPM (0.07-4.7 NMPS) Straight, unobstructed pipe requirement: 15 diameters upstream; 10 downstream.
None
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
CAL-V™: In situ, operator-initiated calibration validation
Operating Specs
Type
Insertion
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/H, SLPM, SFPM, MT/H
Flow Rates:
15 to 60,000 SFPM (0.07 to 283 NMPS)
Turndown:
up to 1000:1; 100:1 typical
Flow Ranges:
Pipe Size SCFM MSCFD NM³/HR
1.5" (40mm) 0 - 850 0 - 1,220 0 - 1,520
2" (50mm) 0 - 1,400 0 - 2,020 0 - 2,504
3" (80mm) 0 - 3,080 0 - 4,440 0 - 5,508
4" (100mm) 0 - 5,310 0 - 7,650 0 - 9,496
6" (150mm) 0 - 12,040 0 - 17,340 0 - 21,530
8" (200mm) 0 - 20,850 0 - 30,020 0 - 37,284
12" (300mm) 0 - 46,650 0 - 67,180 0 - 83,420
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.
Gas Pressure (max):
500 psig (34 barg)
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 or RS485 Modbus RTU.
  • 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:
USB communication port is standard.
Software:
The free PC-based software tool - FT4A View™ - provides complete configuration, remote process monitoring, and data logging functions.
Optional serial communication:
RS485 Modbus RTU (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.
Physical Specs
Type
Insertion
Sensor Material:
316 stainless steel standard.
Enclosure:
NEMA 4, Aluminum, dual conduit entries with ¾" FNPT.
Retractor Assemblies:
150 psig (10.3 barg) max.
Installation:
Fox-supplied compression fitting connects to customer-supplied 1" female coupling welded to pipe.

FT4A Approvals

CE: Approved

  • EMC Directive; 2014/30/EU
  • Emissions and Immunity Testing: EN61326-1:2013

FM (U.S.) and FMc (Canada): Approved

  • Class I, Div. 1, Gps B, C, D;
  • Class II, Div. 1, Gps E, F, G;
  • Class III, Div. 1; T4, Ta = -40°C to 70°C;
  • Class I, Zone 1, AEx/Ex db IIB+H2 T4; Gb Ta = -40°C to 70°C; Type 4X, IP66/67

ATEX (FM16ATEX0013X): Approved

  • II 2 G Ex db IIB+H2 T4; Gb Ta = -40°C to 70°C; IP66/67
  • II 2 D Ex tb IIIC T135°C; Db Ta = -40°C to 70°C; IP66/67

IECEx (IECEx FMG 16.0010X): Approved

  • Ex d IIB+H2 T4; Gb Ta = -40°C to 70°C; IP6/67
  • Ex tb IIIC T135°C; Db Ta = -40°C to 70°C; IP66/67

ATEX and IECEx Standards:

EN 60079-0:2012 + A11:2013
EN 60079-1:2014
EN 60079-31:2014
EN 60529:1991 + A1:2000

IEC 60079-0:2011
IEC 60079-1:2014
IEC 60079-31:2013
IEC 60529:2001

Optional items available for the Model FT4A Flow Meter:

Talk with our application specialist or a rep near you for sizing and materials requirements

  • FT4A Power Supply
  • Flow meter cleaned and bagged for Oxygen service
  • Certificate of Conformance
  • Certificate of Origin
  • Extra Instruction Manual
  • USB Cable
  • Teflon Ferrule Kit
  • Stainless Steel Tags
  • Retractors

FT4A Downloads

Model FT4A Information to View and/or Download
Model FT4A Datasheet
FT4A Model Codes
FT4A Flowmeter Features
FT4A Procurement Specifications
FT4A Instruction Manual
FT4A Dimensional Drawing
FT4A Troubleshooting Guide
CAL-V™ Certificate
Gas-SelectX® Datasheet
FT4A Power Supply Datasheet
Model FT4A View™ Information to View and/or Download
FT4A View™ Software v. 1.1.33
FT4A View™ Datasheet
FT4A View™ Manual
VCP Driver (for FT4A View™ Software)

Note regarding VCP Driver: If the PC is connected to the Internet and running Windows® 7, 8, or 10, the PC will try to automatically load the VCP driver. If the driver does not load automatically, we have supplied a link above.

Other Downloads

FT4A Dimensional Drawings

FT4A Insertion Models
Local electronics, probe without retractor
Local electronics, probe with retractor
 

FT4A Awards

Nominated for the Flow Control Innovation Award

Overall Winner for Flow Control’s 2017 Innovation Award!

As the Overall Winner of the 2017 Flow Control Innovation Awards, the Fox Model FT4A is the newest Thermal Gas Mass Flow Meter offered from Fox Thermal Instruments.

The Model FT4A has been been awarded the Overall Winner for this award due to its innovative design elements such as the 2nd Generation DDC-Sensor™ technology platform and the new expanded Gas-SelectX® gas menu selection tool. The Model FT4A measures gas flow rate in standard units without the need for temperature and pressure compensation.

Thank you for voting!

Read more in the case study.

Fox Model FT4A Flow Meter

The Fox Model FT4A is the newest Thermal Gas Mass Flow Meter offered from Fox Thermal Instruments.

The Model FT4A measures gas flow rate in standard units (SCFM, NM³/hr, LBS/HR, KG/HR & many more) without the need for temperature and pressure compensation.

A free software tool – FT4A View™ - is available for the Model FT4A that allows the user to connect to and configure the FT4A using a PC or laptop.

Common Features for Fox Model FT4A Flow Meter:

  • Measures process gas flow rate/total and temperature
  • Insertion probes: for 1.5" to 70" 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
  • One output is selectable 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 ±0.5% FS; Flow accuracy for other gases: ±1.5% R ±0.5% FS
  • 10-30 VDC in local enclosures

For complete specs please see the Fox Model FT4A Flow Meter Datasheet.

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