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)

Sensor Node Averaging Method

Airflow: Independent, arithmetic average per fan

Temperature: Independent, velocity weighted or arithmetic average

Listings

UL: UL 873 Listed

BACnet International: BTL Listed (GTC108 and GTM108 transmitters)

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

Temperature sensor: Precision, hermetically sealed, bead-in-glass thermistor

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

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]

Calibration Points: 3

Mounting Rods

Material: Zinc plated steel

Mounting Brackets

Material: 304 stainless steel

Mounting Options & Size Limits

Forward: 6 to 64 inches [152.4 to 1676.4 mm] (diameter at inlet entrance)

Face: 11 to 77 inches [152.4 to 1625.6 mm] (diameter at inlet entrance)

Flare: 6 to 57 inches [279.4 to 1955.8 mm] (opening size at backdraft damper inlet)

Probe to Transmitter Cables

Type: FEP jacket, plenum rated CMP/CL2P, UL/cUL listed, -67 to 392 ⁰F [-55 to 200 ⁰C], UV tolerant

Standard Lengths: 10, 25, and 50 ft. [3.1, 7.6 and 15.2 m]

Connecting Plug: 9/16” [14.29 mm] nominal diameter with gold-plated connector pins

Power Requirement:

24 VAC (22.8 to 26.4 under load) @16V-A

Connector Receptacle Pins and PCB Connections:

Gold-plated receptacle pins, PCB interconnects, PCB edge fingers, and test points

User Interface:

16-character LCD display and 4 button interface

B.A.S. Connectivity Options

GTC108 Transmitter: Two field selectable (0-5/0-10 VDC or 4-20mA), scalable and isolated analog output signals (AO1=airflow, AO2=temperature or alarm) plus one 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 – Individual fan airflow rates are available via the network

GTM108 Transmitter: Two field selectable (0-5/0-10 VDC or 4-20mA), scalable and isolated analog output signals (AO1=airflow, AO2=temperature or alarm) plus one 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 – Individual fan airflow rates are available via the network

GTL108 Transmitter: One isolated Lonworks Free Topology network connection – Individual fan airflow rates and temperatures are NOT available via the network on multiple fan systems

GTD108 Transmitter: One USB connection for thumb drive datalogging of sensor airflow and temperature over specified time intervals

Airflow Alarm

Type: Low and/or high user defined setpoint alarm

Tolerance: User defined % of setpoint

Delay: User defined

Zero Disable: 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

Network Indication: Yes (GTM108 and GTC108 only)

Analog Signal Indication: Yes, on AO2 assignment

Fan Alarm

Type: Minimum airflow, % deviation from median airflow, or % deviation from maximum airflow stored in memory

Tolerance: User defined % of setpoint

Delay: User defined

Zero Disable: 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

Network Indication: Yes (GTM108 and GTC108 only)

Analog Signal Indication: Yes, on AO2 assignment

System Status Alarm

Type: Sensor diagnostic system trouble indication

Visual Indication: Yes, LCD display

Network Indication: Yes

Analog Signal Indication: Yes, on AO2 assignment

EB-Link Bluetooth Interface for Android® and iPhone®:

Download individual sensor node airflow/temperature data, settings and diagnostics – upload settings and run tools (requires password)