The Apogee SP-212 is an accurate, reliable, and durable pyranometer featuring a silicon-cell photodiode with excellent cosine response and measures total solar radiation to within ±5%. The SP-212 is fully potted with a domed-shaped head making the sensor fully weatherproof, self- cleaning, and impervious to thermal based accuracy fluctuations. Each SP-212 pyranometer is carefully pre-calibrated in controlled conditions and traceable to ISO class reference standards so the sensor is ready to go right out of the box.

  • 4-year warranty
  • Comes with Apogee level plate (AL-100) and mounting bracket (AM-110) for easy setup and installation.

Technical Specifications

Sensitivity 2.0 mV per W m-2
Calibration Factor 0.5 W m-2 per mV
Accuracy ± 5%
Measurement Repeatability < 1%
Non-stability (Long-term Drift) < 2% per year
Non-linearity < 1% (up to 1750 W m-2)
Response Time < 1 ms
Field of View 180º
Power Supply 5-24 VDC with a nominal current draw of 300 μA
Spectral Range 360 nm to 1120 nm
Directional (Cosine) Response ± 5% at 75º zenith angle
Temperature Response -0.04 ± 0.04% per ºC
Operating Temperature -40 ºC to 70 ºC
Operating Humidity 0 to 100 % relative humidity
Weather resistance Can be submerged in water up to depths of 30 m
Dimensions 2.40 cm Ø x 2.75 cm H
Weight 90 g (with 5 m of lead wire)
Cable 5 m of shielded, twisted-pair wire

Santoprene rubber jacket (high water resistance, high UV stability, flexibility in cold conditions)

Pigtail lead wires


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