Passive Cloud Cover Detector

this ccf sensor is for measurement of  the cloud cover factor. This innovation of dr. Sten lofveng makes it possible to get automatic observations of the cloud cover factor, ccf 24 hours a day i.e. The fraction of the sky that is covered with clouds. It consists of a day time unit that observes the sky in 4 directions in parts of the solar spectrum, a night time unit that observes the sky in the thermal infra-red spectrum. A microcomputer evaluates the signals and controls the output.