RY-GH type photosynthetic effective radiation sensor (number of photons) is developed, designed and produced by Yunnong Wisdom Company. The product is used to measure the photosynthetic effective radiation of natural light in the wavelength range of 400-700nm. A silicon photodetector is designed to pass through a 400-700nm optical filter. When light enters, a voltage signal is generated which is proportional to the incident radiation intensity, and its sensitivity is proportional to the cosine of the direct angle of the incident light. Each photosynthetic effective radiation meter gives its own sensitivity, and can directly output the numerical value in μmol/m2s unit.
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