Campbell Scientific, Inc.Logan, UT
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 IRR-P

The IRR-P is a precision infrared radiometer made by Apogee Instruments that makes continuous measurements in field conditions. The IRR-P is composed of a thermopile, which measures surface temperature, and a thermistor, which measures sensor body temperature. The two temperature probes are housed in a rugged aluminum body that contains a germanium window. Both the thermopile and the thermistor output a millivolt signal. Our dataloggers measure the millivolt signals and apply the Stefan-Boltzman equation.
 
 

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