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IR02-TR PYRGEOMETER

IR02-TR PYRGEOMETER
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Thermal Sensors Pyrgeometer with heater and 4-20 mA transmitter IR02-TR is a pyrgeometer suitable for longwave irradiance measurement in meteorological applications. The instrument can be heated, which improves measurement accuracy as it prevents dew deposition on its window. IR02-TR houses a 4-20 mA transmitter for easy read-out by dataloggers commonly used in the industry. Introduction IR02-TR measures the longwave or far-infra-red radiation received by a plane surface, in W/m2, from a field of view angle of approximately 150o. Longwave radiation is the part of radiation that is not emitted by the sun. The actual field of view angle of IR02-TR is not the ideal 180 o. The reduction of this field of view makes it possible to offer an instrument at an attractive price level, while the accuracy loss is relatively small. IR02-TR has a window with a cut-on at 4.5 x 10-6 m, making it suitable for day- and night observations. Figure 1 IR02-TR pyrgeometer with heater and 4-20 mA transmitter 3 Using IR02-TR is easy. The pyrgeometer can be connected directly to commonly used data logging systems. The irradiance in W/m2 is calculated by using the transmitter’s output and the temperature reading. The final result is calculated taking into account the irradiance radiated by the sensor itself (Stefan-Boltzmann law). In IR02-TR’s standard configuration, the 4 to 20 mA output corresponds to a transmitted range of -300 to +100 W/m2. This range can be adjusted at the factory upon request. general meteorological observations climatological networks agricultural warning networks (frost) Figure 2 overview of IR02-TR: (1) cable, (2) cable gland, (3) window with solar blind filter, (4) sensor (below window), (5) sensor body, (6) transmitter housing (7) levelling feet, (8) bubble level IR02-TR pyrgeometer employs a thermal sensor with black coating, a flat silicon window with solar blind filter and an anodised aluminium body. IR02-TR houses an on-board heater. Heating prevents condensation of water on the pyrgeometer window which, when occurring, leads to very large measurement errors. IR02-TR has a high sensitivity. With the transmitter a typical datalogger no longer contributes to the uncertainty of the measurement. Copyright by Hukseflux. Version 1602. We reserve the right to change specifications without prior notice Page 1/2. For Hukseflux Thermal Sensors go to www.hukseflux.com or e-mail us: info@huksef

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Thermal Sensors IR02-TR specifications Measurand Optional measurand Optional measurand Output Principle Spectral range IR02-TR Field of view angle Response time (95 %) Rated operating temperature range Transmitted range Temperature dependence Figure 3 IR02-TR with heater and 4-20 mA transmitter Standards Calibration of pyrgeometers used for downward longwave radiation is traceable to the World Infrared Standard Group (WISG). This calibration takes into account the spectral properties of downward longwave radiation. As an option, calibration can be made traceable to a blackbody and the...

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IR02-TR PYRGEOMETER 2Pages

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IR02-TR PYRGEOMETER
2Pages