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Detailed analysis of the working principle of particle counter
Date: 2025-09-14Read: 0
A particle counter is an instrument used to detect the number of small particles in air or liquid. Can accurately measure the concentration, size distribution, and pollution sources of small particles in air or liquid. This type of equipment is widely used in fields such as environmental monitoring, clean room management, industrial production, and air quality monitoring.
particle counterWorking principle:
1. Light scattering method: This is the most common method based on the principle that particles scatter light under laser beam irradiation. When air or liquid flows through the light source of the counter, particles will cause scattering of the light source, and the intensity and angle of the scattered light can be used to determine the number and size of particles. By analyzing the signal of scattered light, the concentration and distribution of particles can be estimated.
2. Charge method: This method measures the quantity of particles by utilizing their charged nature. After being charged, particles will undergo changes in the electric field through electrodes in the electric field. By detecting this change, the number of particles can be determined.
3. Dynamic light scattering: The dynamic light scattering method estimates the number and size of particles by analyzing their motion trajectories in liquids or gases. This method is mainly used for detecting particles in liquids.
4. Mechanical method: Some use mechanical methods for particle capture, collecting particles through physical filtration, and then detecting the number and size of particles through weighing or microscopy.
Application areas of particle counters:
1. Cleanroom management: Cleanrooms have strict requirements for particulate matter in the air and are one of the core equipment for environmental monitoring in cleanrooms. By real-time monitoring of particulate matter in the air, we ensure that the cleanroom environment meets ISO grade requirements and avoids product contamination, especially in high-tech industries such as semiconductors, pharmaceuticals, and aerospace.
2. Environmental monitoring: can be used for air quality monitoring, especially in air pollution detection. They can help governments and environmental agencies monitor the concentration of suspended particulate matter in the air, analyze the degree and sources of air pollution, and take corresponding control measures.
3. Medical field: In places such as hospitals, pharmaceutical factories, and biological laboratories, the concentration of particulate matter directly affects the safety of products and patients. The application in these fields can effectively avoid particle pollution and ensure that the environment meets hygiene standards.
4. Industrial production: In precision production processes, particulate matter may affect the performance of production equipment and the quality of products. Plays a crucial role in high-precision manufacturing fields such as semiconductors, optical devices, and aerospace.
5. Food and beverage industry: During the production process, particle contamination may affect the quality of food and even pose food safety hazards. Widely used in the food industry to monitor air quality in production environments and prevent food contamination.
6. Scientific research experiments: In many scientific research experiments, particulate matter may affect the experimental results, so it is used to maintain the cleanliness of the experimental environment and ensure the accuracy of experimental data.