Campbell Scientific LP02 Hukseflux Pyranometer - Manual (Page 14)

LP02 Pyranometer
5. Overview
The LP02 pyranometer is designed for continuous outdoor use. Due to its flat
spectral sensitivity from 280 to 3000 nm, it can be used in natural sunlight,
under plant canopies, in green houses or buildings, and inverted to measure
reflected solar radiation. Two LP02s can be used in combination to measure
albedo. The LP02 can also be used to measure most types of artificial light
(Xenon lamps, Halogen lamps, etc.).
The LP02 pyranometer consists of a thermopile sensor, housing, dome, and
cable. The thermopile is coated with a black absorbent coating. The paint
absorbs the radiation and converts it to heat. The resultant temperature
difference is converted to a voltage by the copper-constantan thermopile. The
thermopile is encapsulated in the housing in such a way that it has a field of
view of 180 degrees and the angular characteristics needed to fulfill the cosine
response requirements.
The LP02’s cable has a user-specified length that can terminate in:
• Pigtails that connect directly to a Campbell Scientific datalogger
(cable termination option –PT).
• Connector that attaches to a prewired enclosure (cable termination
option –PW).
• Connector that attaches to a CWS900 Wireless Sensor Interface (cable
termination option –CWS). The CWS900 enables the pyranometer to
be used in a wireless sensor network.
6. Specifications
Features:
• Compatible with most Campbell Scientific dataloggers
• Measures reflected solar radiation when inverted
• Provides measurements in direct sunlight, under plant canopies, when
the sky is cloudy, and in artificial light
• Includes bubble level and leveling screws eliminating need for a
separate leveling base, which simplifies installation
• Compatible with the CWS900-series interfaces, allowing it to be used
in a wireless sensor network
• Acceptable for providing the solar radiation data used in stability
estimations
• Dome protects thermopile and allows water to roll off of it
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