The Auxiliary radiation sensor  SG-IRR210B is used on those PV systems that have more of a tilt and / or more than one orientation of the PV modules.
It is equipped with a monocrystalline cell (33x50 mm), which measures the insolation on the basis of the inclination and orientation of the photovoltaic modules.
you can use in all weather conditions.

SunGuard Sensor Box is connected to via a cable.
It is equipped with an integrated circuit board, through which can emit four different output signals.
The accuracy of this instrument is ± 5% on an annual basis.
The insulation class is IP65.