Direct & Diffuse Radiation

Sensors in this category measure, or calculate incoming short wave radiation, from either direct, or diffuse sources.

For direct radiation, a pyrheliometer measures radiation at normal incidence and is mounting on a tracking device which follows the angle of the sun. For diffuse radiation a shade disk or shadow band is used to block out direct radiation.

Delta-T SPN1 Sunshine Pyranometer

The SPN1 is an affordable and effective way of measuring total, direct and diffuse radiation.
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Eppley SMT Automatic Solar Tracker

The Eppley Automatic Solar Tracker, Model SMT was developed to allow convenient automatic pointing of normal incidence solar radiation measuring instruments (sNIP , AHF) at the sun.
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Eppley sNIP Normal Incidence Pyrheliometer

A pyrheliometer mounted on a solar tracker is used to measure the Direct Beam Solar Irradiance (DNI) from the sun.
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