BACnet and Modbus are available only on GTB108e, GTM108e, GTS108e, and GTC108e.
BACnet is a registered trademark of ASHRAE. ASHRAE does not endorse, approve, or test products for compliance with ASHRAE standards. Compliance of listed products to the requirements of ASHRAE Standard 135 is the responsibility of BACnet International. The BTL logo is a registered trademark of BACnet International.
The GTx108e-F/An is an accurate and repeatable airflow and temperature measurement system in fan arrays that support one to eight fans. Individual airflow rates and fan alarming are available with combination analog output/network models. The system does not affect fan performance. EB-Link App is a tool that can enhance commissioning or provide a quick validation anytime without going through the BAS—data at the Touch of Your Finger.
Probe and Sensor Node Configurations
Fan Arrays (less than or equal to 4 fans): 2 probes x 1 sensor node per probe or 1 probe x 1 sensor node per probe in each fan
Fan Arrays (greater than 4 fans): 1 probe x 1 sensor node per probe in each fan (8 probe maximum)
Installed Airflow Accuracy1
±(3% to 10%) of reading, depending on fan type and installation. May be improved by field adjustment using the Field Adjust Wizard (FAW) to
a reliable reference
Sensor Node Averaging Method
Airflow: Independent, arithmetic average per fan
Temperature: Independent, velocity weighted average
Listings & Compliance
UL: 60730-1; CAN/CSA-E60730-1
CE: Yes (/NR option only)
UKCA: Yes (/NR option only)
BACnet International: BTL Listed (GTB108e, GTC108e, GTM108e and GTS108e transmitters)
FCC: This device complies with Part 15 of the FCC rules
RoHS: This device is RoHS2 compliant
Environmental Limits
Temperature:
Probes: -20 to 160 ⁰F [-28.9 to 71.1 ⁰C]Transmitter: -20 to 120 ⁰F [-28.9 to 48.9 ⁰C]Humidity: (non-condensing)
Probes: 0 to 100%
Transmitter: 5 to 95%
Sensing Node Sensors
Self-heated sensor: Precision, hermetically sealed, bead-in-glass thermistor probe
Temperature sensor: Precision, hermetically sealed, bead-in-glass thermistor probe
Sensing Node Housing
Material: Glass-filled Polypropylene
Sensor Potting Materials: Waterproof marine epoxy
Airflow Measurement
Accuracy: ±2% of reading to NIST-traceable airflow standards (includes transmitter uncertainty)
Calibrated Range: 0 to 10,000 fpm [0 to 50.8 m/s]Calibration Points: 16
Temperature Measurement
Type: Velocity-weighted average
Accuracy: ±0.15⁰F [0.08 ⁰C] to NIST-traceable temperature standards (includes transmitter uncertainty)
Calibrated Range: -20 to 160 ⁰F [-28.9 to 71.1 ⁰C]Calibration Points: 3
Mounting Rods
Material: Zinc plated steel
Mounting Brackets (Throat, Forward, Face, Flare)
Material: 304 stainless steel
Mounting Options & Size Limits
Face: 11 to 77 inches [279.4 to 1955.8 mm] (diameter at inlet entrance)
Forward: 6 to 64 inches [152.4 to 1625.6 mm] (diameter at inlet entrance)
Flare: 6 to 57 inches [152.4 to 1447.8 mm] (opening size at backdraft
damper inlet)
Probe to Transmitter Cables
Type: FEP jacket, plenum rated CMP/FT6/CL2P, UL/cUL listed, -67 to 302 ⁰F [-55 to 150 ⁰C], UV tolerant
Standard Lengths: 10, 25, and 50 ft. [3.1, 7.6, 15.2 m]
Connecting Plug: 9/16” [14.29 mm] nominal diameter
Power Requirement: 24 VAC (22.8 to 26.4 under load) @16V-A
PCB Connections: Gold-plated PCB interconnects, PCB edge fingers, and test points
User Interface: 2 line x16-character backlit LCD display and 4 button interface
B.A.S. Connectivity Options
All Transmitters: Three field selectable (0-5/0-10 VDC or
4-20mA), scalable and isolated analog output signals (AO1=airflow, AO2=temperature or alarm, AO3=Not Used).
GTA108e Transmitter: No additional connectivity to B.A.S.
GTC108e Transmitter2: One additional field selectable (BACnet MS/TP or Modbus RTU) and isolated RS-485 network connection
GTB108e Transmitter2: One additional isolated RS-485 and one additional isolated Ethernet network connections field configurable as follows:
GTM108e Transmitter2: One additional isolated Ethernet network connection field configurable as follows:
GTS108e Transmitter2: Two additional isolated Ethernet network connections are field configurable as follows:
GTF108e Transmitter: One additional isolated Lonworks Free Topology network connection
GTU108e Transmitter: One additional USB connection for thumb drive data-logging of sensor node airflow rates and temperatures
Alarms
Airflow: Low and/or high user defined setpoint alarm
Fan (An models Type): Minimum airflow, % deviation from median airflow, or % deviation from maximum airflow stored in memory
System Status: Sensor diagnostic system trouble indication
EB-Link Bluetooth® low energy Interface for Android® and iPhone®: Download individual sensor node airflow/temperature data, settings and diagnostics3
1 Installed airflow accuracy is the actual system accuracy expected and includes sampling uncertainty of the sensor probes.
2 Individual sensor node airflow rates and temperatures are available via the network.
3 Order with the /NR option when RF devices are not permitted.
-F Face Mount Installation Guide – Download
-F Forward Mount Installation Guide – Download
-F Flare Mount Installation Guide – Download
Start-Up Guide GTA108e-F – Download
Start-Up Guide GTB108e-F – Download
Start-Up Guide GTC108e-F – Download
Start-Up Guide GTF108e-F – Download
Start-Up Guide GTM108e-F – Download
Start-Up Guide GTS108e-F – Download
