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.

BACnet and Modbus are available only on GTM116E and GTC116E.

Advantage IV
Gold Series


Airflow and Temperature Measurement Device with Alarm Capability

EBTRON offers a premium solution for precise and consistent measurement in outdoor air delivery monitoring and airflow tracking applications. The GTX116E-P+ features advanced airflow and temperature measurement, alarm capabilities, and the option to connect via BACnet or Modbus. With unparalleled functionality, it is an excellent choice for high-performance buildings.

Product Overview






Probe and Sensor Node Configurations (max.)
2 probes x 8 sensor nodes/probe
4 probes x 4 sensor nodes/probe

Installed Airflow Accuracy¹
Ducts/Plenum: ±3% of reading
Non-ducted OA Intakes: better than or equal to ±5% of reading

PC Sensor Density
Refer to the P+ sensor density table.

Sensor Node Averaging Method
Airflow: Independent, arithmetic average
Temperature: Independent, velocity weighted average

Listings and Compliance
UL: : UL-873 and CSA C22.2 No. 24
CE: Yes
UKCA: UK shipments only
BACnet International: BTL Listed (GTC116e and GTM116e transmitters)
FCC: This device complies with Part 15 of the FCC rules
RoHS: This device is RoHS2 compliant

Environmental Limits
Probes: -20 to 160 ºF [-28.9 to 71.1 ºC]Transmitter: -20 to 120 ºF [-28.9 to 48.9 ºC]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 (Kynar® with /SS option)

Sensor Potting Materials: Waterproof marine epoxy

Sensing Node Internal Wiring
Type: Kynar® coated copper

Airflow Measurement
Accuracy: ±2% of reading to NIST-traceable airflow standards (includes transmitter uncertainty)
Calibrated Range: 0 to 5,000 fpm [25.4 m/s]Calibration Points: 16

Temperature Measurement
Accuracy: ±0.15 ⁰F [0.08 ⁰C] to NIST-traceable temperature standards (includes transmitter uncertainty)
Calibrated Range: -20 to 160 ⁰F [-28.9 to 71.1 ⁰C]Calibrated Points: 3


Material: Gold anodized 6063 aluminum (316 stainless steel with /SS option)

Mounting Brackets
Material: 304 stainless steel

Mounting Options & Size Limit¹
Insertion: 6 to 191 in. [152.4 to 4851 mm]Stand-off: 6 to 190 in. [152.4 to 4826 mm]Internal: 8 to 194 in. [203.2 to 4928 mm]

Note: The /H option is only available on probes >18 in.[457.2 mm]

Probe to Transmitter Cables
Type: FEP jacket, plenum rated CMP/CL2P, UL/cUL listed, -67 to 302 ⁰F [-55 to 150 ⁰C], UV tolerant

Standard Lengths: 10, 15, 20, 25, 30, 40, and 50 ft. [3.1, 4.6, 6.1, 7.6, 9.1, 12.2, and 15.2 m]

Connecting Plug: 13/16” [20.63 mm] nominal diameter with gold-plated connector pins


Power Requirement:
24 VAC (22.8 to 26.4 under load) @20V-A max

Connector Receptacle Pins and PCB Connections: Gold-plated receptacle pins, 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 Transmitter: Three field selectable (0-5/0-10 VDC or 4-20mA), scalable and isolated analog output signals (AO1=airflow, AO2=temperature or alarm, AO3=%RH, enthalpy or dew point). When / H option is provided.

GTA116e Transmitter: No additional connectivity to B.A.S.

GTC116e Transmitter: One additional field selectable (BACnet MS/TP or Modbus RTU) and isolated RS-485 network connection -Individual sensor node airflow rates and temperatures are available via the network.

GTM116e Transmitter: One additional isolated Ethernet
(simultaneously supported BACnet Ethernet or BACnet IP, Modbus TCP, and TCP/IP) network connection – Individual sensor node airflow rates and temperatures are available via the network.

GTF116e Transmitter: One additional isolated Lonworks Free Topology network connection.

GTU116e Transmitter: One additional USB connection for thumb drive data-logging of sensor node airflow rates and temperatures.

Airflow Alarm
Type: Low and/or high user-defined setpoint alarm
Tolerance: User-defined % of setpoint
Delay: User defined
Zero Disable: The alarm can be disabled when the airflow rate falls below the low limit cutoff value (unoccupied periods)
Reset Method: Manual or automatic
Visual Indication: Yes, LCD display
Analog Signal Indication: Yes, on AO2 assignment

System Status Alarm
Type: Sensor diagnostic system trouble indication
Visual Indication: Yes, LCD display
Analog Signal Indication: Yes, on AO2 assignment

EB-Link Bluetooth Interface for Android® and iPhone®:
Display real-time airflow, velocity-weighted temperature, humidity, enthalpy, dew point, individual sensor node airflow/temperature data, settings, and diagnostics.

¹ Installed airflow accuracy allows for additional uncertainty that results from averaging a finite number of sensors in a contorted velocity profile created from up and downstream disturbances. The specified installed accuracy is based on the P+ sensor density rules for installations that meet or exceed EBTRON minimum placement requirements. P+ sensor density rules may not be available in certain duct sizes due to sensor placement limitations.

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