How does a particulate matter sensor work
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What is a particulate matter sensor?
A particle sensor is a device used to detect the concentration of particulate matter in the air. It can measure the concentration of tiny particles such as PM2.5 and PM10 in the air, which have a great impact on human health. The principle of the particle sensor is based on the principle of optical scattering.
How does a particulate matter sensor work
The particle sensors currently on the market are mainly Laser Dust Sensors, which have a light source and a light scatterer inside. The light source will emit a beam of light. After passing through the light scatterer, the light will scatter to the particles in the air and then be scattered back by the particles. The sensor measures the intensity of the light that is scattered back to calculate the concentration of particulate matter in the air.
The working principle of the particle sensor can be expressed by a simple formula: C = K * (I / V), where C represents the concentration of particulate matter, K is a constant, I represents the intensity of the light scattered back, and V represents the concentration in the air. volume. This formula explains how a particle sensor measures the intensity of light to calculate particle concentration.
The accuracy and sensitivity of a particulate matter sensor depends on the quality of the light source and light scatterer. The sensor's light source is usually an LED light, and the light diffuser is a special material that scatters light onto particles in the air. The sensor also requires a microprocessor to process the measurement data and display the results on the screen.
Particulate matter sensors have a wide range of applications and can be used in indoor air quality detection, industrial pollution monitoring, traffic pollution monitoring and other fields. As people become more concerned about air quality, the demand for particulate matter sensors is also increasing. In the future, particle sensor technology will continue to evolve, making it more accurate, sensitive and portable.
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