This innovation makes it possible to get automatic observations of the Cloud Cover Factor, CCF 24 hours a day. 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.
Real time data from a PCCD located in Göteborg, Sweden can be seen here.
Short data for the unit: Approx size: 22*13*15 cm
Power supply: 12 Volt DC
Current consumption: about 2 mA for electronics and about 50 mA for heating
Temperature range: -20 to +70 deg C
Output: Analog 0 to 1V, for CCF 0 to 100%.
Alt: digital RS232 polled or streaming