SP230 Heated Pyranometer

The new SP230 heated pyranometer, manufactured by Apogee Instruments, can make solar radiation measurements during the most severe weather. This pyranometer includes an internal heater, an elevated base, and a domed-shaped head that prevent snow, frost, and dew from accumulating on the sensor. Its small heater draws just 15 mA of current, allowing the SP230 to be powered by a small solar panel and battery—even on days with a short duration of daylight and at high latitudes (far away from the equator). Figures 1 and 2 show that the SP230’s design features improve the solar radiation measurements during icy conditions.

SP230 Pyranometer Daily Errors

SP230 Monthly Errors