The improved Delta-T Devices BF5 Sunshine Sensor is a versatile, multi-purpose solar radiation sensor. It uses an array of photodiodes with a unique shading pattern to measure incident solar radiation from which it calculates the global and diffuse components of the radiation. It also measures sunshine duration.
Improved Design The BF5 has replaced the BF3 model. Its advantages include an integrated heater as standard plus superior connectors and cabling. The heater keeps the BF5 clear of dew, ice and snow down to -20 degrees C.