The SP-522-SS is an upward-looking thermopile pyranometer with a digital signal using Modbus RTU protocol over RS-232 or RS-485. The sensor incorporates a blackbody thermopile detector and acrylic diffuser with a rugged, self-cleaning sensor housing design, and high-quality cable terminating in pre-tinned pigtail leads for easy connection to dataloggers and controllers. Typical applications include shortwave radiation measurement in agricultural, ecological, and hydrological weather networks. Sensors are also used to optimize photovoltaic systems. Sensor includes IP68 marine-grade stainless-steel cable connector to simplify sensor removal and replacement for maintenance and recalibration.
ISO 9060:2018Class C (previously known as second class)Input Voltage Requirement5.5 to 24 VAverage Max Current Draw4 mA (heater off); 30 mA (heater on)Calibration Uncertainty± 5 %Measurement RepeatabilityLess than 1 %Long-term Drift (Non-stability)Less than 2 % per yearNon-linearityLess than 1 % (up to 2000 W mˉ²)Field of View180˚Spectral Range385 to 2105 nm (wavelengths where response is 50 % of maximum)Directional (Cosine) ResponseLess than 30 W mˉ² at 80˚ solar zenithTemperature ResponseLess than 5 % from -15 to 45 CZero Offset ALess than 5 W mˉ²; Less than 10 W mˉ² (heated)Zero Offset BLess than 5 W mˉ²Operating Environment-50 to 80 C; 0 to 100 % relative humidity; can be submerged in water up to 30 mDimensions30.5 mm diameter, 37 mm heightMass (with 5 m of cable)140 gCable5 m of two conductor, shielded, twisted-pair wire, additional cable available in multiples of 5 m; TPR jacket (high water resistance, high UV stability, flexibility in cold conditions); pigtail lead wiresWarranty4 years against defects in materials and workmanshipManufacturedMade in the USA