“WPM 01 Solar Pyranometer, measures solar irradiance. The sensor’s transducer, which converts incident radiation to electrical current, is a silicon photodiode. From the sensor’s output voltage, the console calculates and displays solar irradiance. It also integrates the irradiance values and displays total incident energy over a set period of time.
Resolution and Units : 1 W/m2
Range : 0 to 1800 W/m2
Accuracy : ±5% of full scale (Reference: Eppley PSP at 1000 W/m2 ) plus 45 W/ m2 per 100′ (30 m) of additional cable
Drift : up to ±2% per year
Update Interval : 50 seconds to 1 minute