Question

Explain the construction and working principle of pyranometer and pyrheliometer

Answer 1

A pyranometer is operated based on the measurement of temperature difference between a clear surface and a dark surface. ... The potential difference created in the thermopile owing to the temperature gradient between the two surfaces is used for measuring the amount of solar radiation.

Answer 2

The construction and working principle of pyranometer:

• A pyranometer's work is dependent on the estimation of temperature contrast between two surfaces one being clear and other being dark.
• The dark covering on the thermopile sensor assimilates the sun oriented radiation, while the surface that is clear reflects it, and thus less warmth is ingested.

The construction and working principle of  pyrheliometer:

• A pyrheliometer is an apparatus for estimation of beams of light or radiance powered by sun.
• A window is present throuh which the beam of light enters the instrument tand is forwarded onto a thermopile which changes the heat received to an electrical sign that can be recorded.
• The voltage signal is changed over through an equation to gauge watts per square meter.

To know more:

What is the difference between pyrheliometer and a pyranometer?

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Difference between pyranometer and pyrheliometer

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