Description
FEATURES
- Compatible with GreenTrol transmitters and controllers that accept IAT integrated sensors
- Thermal dispersion technology
- Calibrated from 0 to 3,000 FPM
- Stable bead-in-glass thermistor sensors
- NIST traceable airflow and temperature measurement
- Accurate and repeatable
- Designed for openings up to 8 square feet
- Universal mounting design facilitates ordering and installation
- Three probe lengths available
- Aluminum probe construction
- FEP plenum rated cable with terminal DIN connector plug provided
OVERVIEW
IAT (integrated airflow/temperature) sensors reduce cost by eliminating the redundancy of a separate transmitter for airflow and temperature measurement. The processing circuitry and firmware is integrated into one of GreenTrol’s microprocessor-based transmitters or application specific controllers.
The IAT-US airflow/temperature sensor is designed for mounting inside of plenums or other openings where airflow measurement is desired. One or two probes with a single sensor node are typically used. Sensor node airflow accuracy is ±3% of reading to NIST traceable standards. An installed accuracy of ±10% of reading or better can often be achieved without field adjustment. A field adjust wizard built into GreenTrol’s transmitters and application specific controllers facilitate field setup when conditions warrant.
The IAT-US sensor probe uses the principal of thermal dispersion to determine the airflow rate. Thermal dispersion is ideal for HVAC applications that typically require measurement of low air velocities. Each sensing node uses two thermistors to determine airflow. One thermistor is self-heated above ambient while a second thermistor determines the ambient air temperature. The power dissipated into the airstream is directly related to the airflow rate.
Each thermistor body is a hermetically sealed bead-in-glass probe. Bead-in-glass thermistors have demonstrated extreme stability and superior performance over chip type thermistors used by other manufacturers. The bead-in-glass sensor used has been time tested for over 35 years by GreenTrol’s sister company, EBTRON. Thermistors are potted in a waterproof sensor assembly and are designed for years of trouble-free operation.
Each sensing node is individually calibrated at 7 points in high performance wind tunnels. Transmitters and controllers measure and process each individual sensor node independently. The result is the true average airflow rate and temperature when more than one sensing node is applied.
FUNCTIONALITY
Airflow Measurement: Provides individual sensor node airflow rates to compatible GreenTrol transmitters and controllers
Temperature Measurement: Provides individual sensor node temperatures to compatible GreenTrol transmitters and controllers
AIRFLOW/TEMPERATURE MEASUREMENT PROBE
Type: -US Universal Insertion Mount Thermal Dispersion Airflow and Temperature Measurement Probe
Available Configurations
Single: 1 probe x 1 sensor node
Dual: 2 probes x 1 sensor node/probe
Sensing Node Sensors
Self-heated sensor: Precision, hermetically sealed, bead-in-glass thermistor probe
Temperature sensor: Precision, hermetically sealed, bead-in-glass thermistor probe
Probe Tube
Material: Mill finish 6063 aluminum
Probe Mounting Brackets
Material: 304 stainless steel
Probe Length: 6, 8 or 16 in. [152.4, 203.2 or 406.4 mm] (adjustable)
Sensing Node Housing
Material: Glass-filled Polypropylene
Sensor Potting Materials: Waterproof marine epoxy
Sensing Node Internal Wiring
Sensing Node Internal Wiring: Kynar® coated copper
Probe to Transmitter Cables
Material: 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: 0.60” [15.24 mm] nominal diameter
Airflow Measurement
Sensor Accuracy: ±3% of reading to NIST-traceable airflow standards
Averaging Method: Independent, arithmetic average
Installed Accuracy: Typically better than ±10% of reading in ducts/openings ≤ 8 sq ft [0.74 sq m]
Calibrated Range: 0 to 2,000 fpm [0 to 10.16 m/s]
Calibration Points: 7
Temperature Measurement
Averaging Method: Independent, velocity weighted
Accuracy: ±0.15⁰F [0.08 ⁰C]
ENVIRONMENTAL LIMITS & POWER REQUIREMENTS
Environmental Limits
Temperature: -20 to 120 ⁰F [-28.9 to 48.9 ⁰C]
Note: Temperature limits for operation may be limited by the transmitter or controller selected
Humidity: 0 to 100%
Power Requirement: Power is provided by the transmitter or controller and is included in the transmitter/controller power requirement specification
