This is PR-300AL-GH-NO1 Solar Radiation (MTI.AWS.ZT.PAR). The photosynthetically active radiation sensor uses the principle of photoelectric sensing and can be used to measure the spectral range 400~700nm The sensor uses high-precision photoelectric sensing elements, wide spectrum absorption,400-700nm The absorption is high within the range and the stability is good. When there is light, a voltage signal proportional to the incident radiation intensity is generated, and its sensitivity is proportional to the cosine of the direct angle of the incident light. The dust cover is specially treated to reduce dust absorption, effectively prevent environmental factors from interfering with internal components, and can measure photosynthetically active radiation more accurately. Product Adoption StandardModbus-RTU 485The communication protocol can directly read the current photosynthetically active radiation value, and the wiring method is simple. The appearance is small and beautiful, and it takes up little installation space. The product is widely used in research in meteorology, agriculture, air pollution and other fields.