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Apogee Infrared Radiometers

High-accuracy, non-contact surface temperature measurements for environmental applications in harsh conditions Depending on the accuracy required for your application, Apogee offers several research-grade sensors with ± 0.2 C uncertainty and a lower-priced commercial-grade sensor with ± 0.5 C uncertainty.

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High-accuracy, non-contact surface temperature measurements for environmental applications in harsh conditions
Depending on the accuracy required for your application, Apogee offers several research-grade sensors with ± 0.2 C uncertainty and a lower-priced commercial-grade sensor with ± 0.5 C uncertainty.

High-Accuracy Measurements
All Apogee IR sensors are NIST traceable and include a calibration certificate. Sensors are calibrated to a custom blackbody cone. Research-grade sensors feature a measurement uncertainty of ± 0.2 C from -30 to 65 C when the sensor (detector) temperature is within 20 C of the surface (target) being measured. Commercial-grade sensors have a measurement uncertainty of ± 0.5 C from 0 to 50 C when the sensor is within 20 C of the surface. Radiometers are only sensitive from 8 to 14 µm (atmospheric window) to minimize the influence of water vapor and CO2 on the measurement.
Field-of-View Options
Research-grade sensors come in five fields-of-view, which includes three circular and two horizontal apertures. Commercial-grade sensors comes in two fields-of-view, one circular and one horizontal aperture.
Typical Applications
Both radiometers can be used to measure plant canopy temperature for use in plant water status estimation. The radiometers are also used in phenotyping and phenomics of different plants. They can additionally be utilized to monitor road surface temperature to determine ice conditions and to measure terrestrial surface (soil, vegetation, water, snow) temperature in energy balance studies.

Output Options
Handheld Meter Options:
Standard Field of View: MI-210
Narrow Field of View: MI-220
Horizontal Field of View: MI-2H0

Research-Grade Sensor Outputs:
Unamplified voltage outputs: SI-111, SI-121, SI-131, SI-1H1, SIF-111, SIF-121, and SIF-1H1
SDI-12: SI-411, SI-421, SI-431, SI-4H1, and SI-4HR
Modbus: SI-511, SI-521, SI-531, SI-5H1, and SI-5HR

Commerical-Grade Sensor Outputs:
Unamplified voltage outputs
SDI-12: SIL-411 and SIL-4H1

Rugged Housing
All sensors have a rugged shield to reduce rapid thermal fluctuations and contains fully-potted electronics. Research-grade sensor radiation shields are made with powder-coated aluminum and a polished interior for lower emissivity. Commercial-grade sensor radiation shields are made with rugged, polished, UV-resistant ASA plastic.

High-Quality Cable
Research-grade pigtail lead sensors feature an IP68, marine-grade stainless-steel cable connector (approximately 30 cm from the head) to simplify sensor removal for maintenance and recalibration. The cable features a shielded, twisted-pair wire with a TPR jacket for high water resistance, UV stability, and flexibility in cold conditions. Commercial-grade pigtail lead sensors have the same high-quality cable, but they do not have a stainless-steel connector.

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