Sunshine duration sensor t057-TSD

Overview
The TSD Sunshine Duration Sensor measures sunshine status and duration according to the WMO definition (direct solar radiation > 120 W/m2). The measuring principle uses an array of 16 photo-detectors; detectors directly exposed to the sun measure direct sunlight while non-illuminated detectors measure diffuse light, which is subtracted to obtain direct radiation. A cylindrical glass protects sensors and internal electronics from weather while ensuring high transparency to sunlight. The design avoids moving parts and ensures long-term reliability. The TSD is available with RS485-Modbus and SDI-12 outputs and includes a separately powered, galvanically isolated heating resistor to prevent condensation on sensitive elements.

Documentation available

• Technical specification (PDF)
• User manual (PDF)

Technical specifications

• Model: TSD
• Measured quantity: Sunshine status and sunshine duration (WMO definition: direct solar radiation > 120 W/m2)
• Measuring principle: Array of 16 photo-detectors; direct radiation obtained by subtraction of diffuse component
• Sensor arrangement: Array ensuring at least one detector is exposed to direct sun
• Outputs: RS485-Modbus and SDI-12
• Housing/protection: Cylindrical glass with high transparency to sunlight
• Anti-condensation: Separately powered, galvanically isolated heating resistor
• Mechanics: No moving parts
• Manufacturer: Siap Micros

Applications

• Meteorological stations
• Environmental monitoring
• Solar resource assessment and PV monitoring