The solar radiation sensor GBS01 measures solar radiation in Watts/m2 when when used in conjunction with our controllers. Using this sensor, system startup is simplified or a more accurate “Switch-up” to the priority consumer is possible when used with multi-circuit solar systems. If two sensors are used it is possible to configure a collector tracking system. Its measurement accuracy is +/- 10 %. The sensor can also be used with third party controllers, see information on the attached specification sheets.