Eppley Pyrheliometer

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Eppley Pyrheliometer

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A pyrheliometer of the thermoelectric type. Radiation is allowed to fall on two concentric silver rings, the outer covered with magnesium oxide and the inner covered with lampblack. A system of thermocouples (thermopile) is used to measure the temperature difference between the rings. Attachments are provided so that measurements of direct and diffuse solar radiation may be obtained.
This instrument has been adopted by the U.S. Weather Bureau for station use. </dd>
_{For instrumentation of NOAA's Surface Radiation Research Branch see} [[1]] </dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use