Middleton Solar - Model DN5-B and DN5-BE - Pyrheliometer for Solar Direct Irradiance - Datasheet

The Middleton Solar DN5-B is a precision pyrheliometer for measuring solar Direct Normal Irradiance (DNI) when aimed at the sun. It exceeds the International Organization for Standardization (ISO) specifications for a Spectrally Flat Pyrheliometer of Class B. The sensor has twin coupled thermopiles to cancel any common-mode response due to temperature transients. The DN5-B has a passive microvolt output, and the DN5-BE version has an in-built amplifier to give a millivolt output for easy signal measurement.