The sunshine duration sensor SD6 detects sunshine duration according to the WMO guidelines. At solar radiation > 120 W/m2 "sunshine" is signaled. Integrated heating elements allow an operation also during fog and frost.

Measuring parameter/uncertainty:

• Measurement parameter: Sunshine-status (sunshine duration)
• Sensor elements: Silicone diodes
• Threshold value: 120 W/m2
• Spectral bandwith: 600 to 1050 nm
• Maximum spectral sensitivity: 900 nm
• Viewing angle: 270 °
• Timely resolution: 1 sec
• Integrated sensor heater
• Low power consumption