The SP-212 is an amplified, analog sensor with a 0 to 2.5 V output. The sensor incorporates a silicon-cell photodiode with a rugged, self-cleaning sensor housing design. Typical applications include shortwave radiation measurement in agricultural, ecological, and hydrological weather networks. Sensors are also used to optimize photovoltaic systems. Sensor includes IP67 marine-grade stainless-steel cable connector 30 cm from head to simplify sensor removal and replacement for maintenance and recalibration.
Power Supply 3.3 to 24 V DC;current draw 10 μA
Sensitivity 2 mV per W mˉ²
Calibration Factor 0.5 W mˉ² per mV (reciprocal of sensitivity)
Calibration Uncertainty ± 5 %
Calibrated Output Range 0 to 2.5 V
Measurement Repeatability Less than 1 %
Non-stability (Long-term Drift) Less than 2 % per year
Non-linearity Less than 1 % (up to 1250 W mˉ², maximum radiation measurement is 1250 W mˉ²)
Response Time Less than 1 ms
Field of View 180 ˚
Spectral Range 360 to 1120 nm (wavelengths where response is 10 % of maximum)
Directional (Cosine) Response ± 5 % at 75 ˚ zenith angle
Temperature Response 0.04 ± 0.04 % per C
Operating Environment -40 to 70 C; 0 to 100 % relative humidity; can be submerged in water up to depths of 30 m
Dimensions 24 mm diameter, 28 mm heightMass90 g (with 5 m of lead wire)
Warranty 4 years against defects in materials and workmanship
