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IR02 pyrgeometer

Updated:2023-06-02

Brand: Hukseflux
Model：IR02
Product description: IR02 is a pyrgeometer suitable for longwave irradiance measurements in meteorological applications. The instrument can be heated, which improves measurement accuracy as it prevents dew deposition on i
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IR02 pyrgeometer： User's Manual Datasheet

IR02 Pyrgeometer with Heater

IR02 measures the longwave or far-infrared radiation received by a plane surface, in W/m², from a field of view angle of approximately 150°. Longwave radiation is the part of radiation that is not emitted by the sun. The actual field of view angle of IR02 is not the ideal 180°. 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 has a window with a cut-on at 4.5 x 10⁻⁶ m, making it suitable for day- and night observations.

Benefits and Operation

IR02 pyrgeometer has a high sensitivity. With sufficient input signal a typical datalogger no longer contributes to the uncertainty of the measurement. IR02 houses an on-board heater. Heating prevents condensation of water on the pyrgeometer window which, when occurring, leads to very large measurement errors.

Using IR02 is easy. It can be connected directly to commonly used data logging systems. The irradiance in W/m² is calculated by dividing the IR02 output, a small voltage, by the sensitivity and by taking into account the irradiated heat by the sensor itself (Stefan-Boltzmann law). The sensitivity is provided with IR02 on its product certificate.

Suggested Use

General meteorological observations

Climatological networks

Agricultural warning networks (frost)

Areas of Application

Building physics / insulation, thermal comfort and energy budget measurement

Meteorology / surface energy flux measurement

IR02 pyrgeometer Specifications：

Measurand	longwave radiation
Optional measurand	sky temperature, surface temperature
Spectral range	4.5 to 40 x 10⁻⁶ m
Field of view angle	150 °
Sensitivity (nominal)	15 x 10⁻⁶ V/(W/m²)
Response time	18 s
Rated operating temperature range	-40 to +80 °C
Temperature dependence	< ± 3 % (-10 to +40 °C)
Calibration traceability	to WISG
Optional traceability	to blackbody (ITS-90)
Temperature sensor	Pt100
Heater	12 VDC, 1.5 W
Standard cable length	5 m (see options)
Options	• Longer cable, in multiples of 5 metres • Blackbody calibration (ITS-90) • IR02-TR pyrgeometer with 4-20 mA output