Why Is Pyrheliometer Used?

A pyrheliometer is a device that measures solar irradiance coming directly from the sun. ... Figure 1 A pyrheliometer is pointed at the sun to measure the solar irradiance coming directly from the sun.

What is the purpose of pyrheliometer?

A pyrheliometer is an instrument designed specifically to measure the direct beam solar irradiance with a field of view limited to 5°, also known as DNI: direct normal incidence. This is achieved by the shape of the collimation tube, with precision apertures, and the detector design.

What is the use of pyrheliometer and pyranometer?

Both the instruments like Pyrheliometer & Pyranometer are used to calculate solar irradiance. These are related in their intention but there are some dissimilarities in their construction & working principle. It is one kind of acidometer mainly used to measure the solar irradiance over a planar surface.