The PAR (photosynthetically active radiation) sensor adopts the principle of photoelectric induction. The par sensor works on a simple principle. When light is present, it generates a voltage signal proportional to the intensity of the incident radiation. Its sensitivity is proportional to the cosine of the direct angle of the incident light. This PAR sensor uses high-precision photoelectric sensing elements.It has high absorption in the 400-700nm spectral range and offers good stability. The shell undergoes special treatment to reduce dust adsorption.This effectively prevents the external environment from damaging the internal components. Researchers widely use it in meteorology, agriculture, air pollution, and other fields