Photosynthetically Active Radiation Sensor

Photosynthetically active radiation refers to the part of solar radiation with a wavelength range of 400~700nm that can be used for photosynthesis of vegetation. The photosynthetically active radiation sensor uses the principle of photoelectric sensing and can be used to measure photosynthetically active radiation in the spectral range of 400~700nm.

Product Description：

Photosynthetically active radiation is the basic energy source for forming biomass, controls the rate of effective photosynthesis of terrestrial organisms, and directly affects the growth, development, yield and quality of plants. At the same time, photosynthetically active radiation is also an important climate resource, affecting the exchange of matter and energy between the surface and the atmospheric environment. Measuring and estimating photosynthetically active radiation is helpful in estimating plant photosynthesis, exploring the origin of green vegetation, and the mechanism of biological use of solar energy. It is of great significance and is also directly related to the formation of agricultural output and is the basis for further increasing agricultural output.

Working principle：

The photosynthetically active radiation sensor adopts the principle of photoelectric induction and can be used to measure photosynthetically active radiation in the spectral range of 400~700nm. The sensor uses high-precision photoelectric sensing elements, wide spectrum absorption, high absorption in the 400-700nm range, and good stability; when there is light, it generates a voltage signal proportional to the incident radiation intensity, and its sensitivity is proportional to the incident light Directly proportional to the cosine of the angle. The dust cover adopts special treatment to reduce dust adsorption, effectively prevent environmental factors from interfering with internal components, and can more accurately measure photosynthetically active radiation.

Equipment Application：

1.Plant photosynthesis research

Photosynthetically active radiation has a regulatory effect on plant photosynthesis, growth and development, morphological construction and plant metabolism. Light of different wavelengths irradiated on plants has different physiological effects on plants. Therefore, the weights of light of different wavelengths participating in photosynthesis are different and vary with plant species and growth stages. The photosynthetically active radiation data measured by the photosynthetically active radiation sensor is of great significance to the study of plant growth, plant photosynthesis and vegetation index.

2.Greenhouse

Measuring the photosynthetically active radiation in the greenhouse can help us understand the internal light intensity of the greenhouse, evaluate the lighting environment in the greenhouse, and provide a basis for selecting crop varieties suitable for planting in the greenhouse. It can also control the automatic rolling shutter device of the greenhouse according to the photosynthetically active radiation.

3.Facility Agriculture

Photosynthetically active radiation sensors can be used in facility agriculture, especially in plant factories equipped with plant supplementary lighting. The measurement of photosynthetically active radiation can monitor and adjust the lighting environment in the entire greenhouse, and can also accumulate lighting data for plants during their growth cycle. Artificial supplementary lighting in facility agriculture must follow the photophysiological characteristics of plants to achieve better supplementary lighting effects. Therefore, it is necessary to accurately measure the spectral composition and irradiation intensity of the supplementary light source; on the other hand, the study of the photophysiological characteristics of plants also requires accurate measurement of the incident light.

Product Parameters：