Silicon pyranometer
Delta Ohm
The special geometry and the diffuser allow to have a pyranometer field of view of 180 degrees according to cosine law.
The pyranometer is suitable for the measurement of natural sunlight. Under
conditions of overcast sky or measures reflected light is recommended to use a thermopile pyranometer (model LP PYRA 03 or LP PYRA 02).
The LP Silicon-PYRA 04 pyranometer can be used in measurements of solar
radiation in the field of renewable energies such as solar thermal and solar
photovoltaic.
The base with level LP BL can be used to facilitate the assembly and placement in plan level. The photocurrent generated by photodiode is converted into a voltage by the shunt resistance.
LP Silicon-PYRA 04 with 5m fixed cable and open wires on the cable end,
typical output 20 μV/(W/m2). Different cable lengths available upon request.
The measurement of radiation across a surface is possible if the probe surface is a Lambert receiver. The excellent concordance between the measured response and cosine law allows to use the equipment even when the sun has a very low elevation and then perform corrective actions throughout the year.
The 97% of solar energy that reaches above the atmosphere (WMO) is confined to 290nm to 3000nm spectral range. The ideal tool for measuring this radiation should have a flat response at least in this spectral range.
Reliable measurements can be obtained only if the LP Silicon-PYRA 04 pyranometer is calibrated with light whose spectrum is equal to the light to be measured.
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