when exposed to radiation fluxes. These changes and
differences in temperature can be measured, and they give
quantitative information on the radiative energy received
- the photoelectric effects of various semiconductors
(photoresistances, photoelements, photodiodes,
phototransistors).
22 Measurement probes
221 Sunshine sensors
- To measure the duration of sunshine, the Campbell-Stokes
recorder, where the focused radiation from the sunburns ab btrace in a chart, is most widely used in international
networks. It is also recommended as an interim
international reference instrument.
(Suppliers: A 1-5)
- To allow for electrical recording of the duration of
sunshine, different "detectors" using thermometric switch
devices or photo electrical elements are available.
However, measurements with these instruments should be
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