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Laser particle counter and laser dust meter (PM2.5 dust detection

Laser particle counter and laser dust meter (PM2.5 dust detection

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-05-07
  • Views:353

(Summary description)Dust particle counter (laser particle counter) and (Laser dust meter) PM2.5 dust Detector is the principle of laser scattering method for particulate matter detection equipment

Laser particle counter and laser dust meter (PM2.5 dust detection

(Summary description)Dust particle counter (laser particle counter) and (Laser dust meter) PM2.5 dust Detector is the principle of laser scattering method for particulate matter detection equipment

  • Categories:Industry News
  • Author:
  • Origin:
  • Time of issue:2021-05-07
  • Views:353
Information

Dust particle counter (laser particle counter) and (Laser dust meter) PM2.5 dust Detector is the principle of laser scattering method for particulate matter detection equipment, but the application of the two fields are different. Dust particle counter is used in cleanroom, clean room to detect cleanliness level. such as pharmaceuticals, electronics, Precision Machinery, CPT manufacturing, microbiology, research institutes, metrology institutes and other industries, to achieve a variety of clean grades of the work table, purification room, purification workshop purification effect, cleanliness level to monitor to ensure product quality. And the dust meter is mainly used to measure atmospheric environment, applicable to various environmental research institutions, meteorology, public health, labor hygiene, air pollution research and other fields, the use of environmental applications in the CDC, mining, metallurgy, power plants, chemical manufacturing, health supervision, environmental protection, environmental monitoring and so on. Why is this? We can judge by the principle of light scattering from two instruments.

We first introduce a noun-aerosol. Aerosols are suspended systems of liquid or solid particles in the air. Fog, smoke, haze, light mist (fog), micro-dust and smog are natural or man-made causes of atmospheric aerosols. They can be used as condensation nuclei of water droplets and ice crystals, absorbers and scatters of solar radiation, and participate in various chemical cycles, which is an important part of the atmosphere. As we can tell, our daily PM2.5 and PM10 are solid particulate matter in atmospheric aerosols. So the dust detector is also called the aerosol detector. It is through the gas pump will be measured aerosol inhalation inspection module, the aerosol to be measured at the branch shunt into two parts, some after an efficient filter is filtered into a clean air, as a protective sheath gas to protect the sensor chamber components from the test gas pollution. Another part of the aerosol, as the sample to be tested directly into the sensor room. In the sensor room, the main components are laser diode, lens group and photoelectric detector. The laser diode emits a thin-layer light source through the lens group. Thin-layer light shines on the aerosol to be measured when it flows through the sensor chamber, and the light scattering intensity is detected by a photoelectric detector. The photoelectric detector generates an electrical signal after illumination, which is proportional to the aerosol mass concentration. Then multiplied by the voltage calibration coefficient, this coefficient is obtained by determining the aerosol of a specific concentration.

Dust Tester The principle of the laser particle counter: the particle counter extracts the sampling gas by sampling pump. In the laser chamber, a sample gas is irradiated by a laser, and the frequency of the flash reflected by the particles represents the number of particles, the intensity of the reflected light, and the particle size. Because the components in the laser chamber do not have sheath gas protection, the laser particle counter should be used in a clean environment to prevent damage to the laser sensor.

When the measured place has the loose grain material, the dust source, the spray place, must maintain at least 12 inches away from the inlet tube, lest above particle and the liquid pollution sensor and the pipeline. It can be seen that the laser dust meter (PM2.5 dust detector) Not only uses the clean gas sheath gas protection function, but also the internal detection sensor structure is more complex, effectively protect the components from the damage of pollutants, so can be in the more complex and serious pollution of the long-term use of the environment. The Dust particle counter (laser particle counter) is not added to the sheath gas in the gas path design, in addition, the detection sensor structure is relatively simple, only a few of several particle size classification, conversion to dust concentration error is huge (estimate 8 channel grading, calculation error is greater than 30%; 2 channel classification, calculation error greater than 50%),

Therefore, only in a relatively clean space for particle count measurement, such as the dust concentration measurement instrument used is large error. Summary: Customers need to choose the right equipment according to their own use environment, for example, dust-free workshop, dust-free environment, need to detect cleanliness level, the laser particle counter (dust particle counter) to detect. If the general environment, atmospheric environment, want to detect the concentration of PM2.5 or PM10, the dust detector to detect.

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