Beijing Zetron Technology Co., Ltd

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How does the particle counter work and what are the precautions for using it?

Source: Beijing Zetron Technology Co., Ltd Popularity:72 Time:2022/07/13 16:26:44 small middle big
A particle counter is an instrument that uses the scattering principle of light to count dust particles. Light scattering is related to particle size, particle refractive index, light wave wavelength and light absorption characteristics of particles. However, as far as the intensity of scattered light and particle size are concerned, there is a basic rule that the intensity of scattered light increases as the surface area of the particles increases. Thus a certain flow of dusty gas is passed through an intense light, and the particles emit scattered light, which is projected onto a photomultiplier tube through a concentrating lens to change the light pulse into an electrical pulse, and the number of particles can be obtained from the number of pulses. The particle diameter can be derived from the intensity of the scattered light as a function of the particle diameter. This is the basic principle of the light scattering particle counter.

The B330 high flow laser particle counter is a new type of particle counter for measuring the size and number of dust particles per unit volume of air in a clean environment, enabling quick verification of clean room cleanliness levels and printing of relevant test results, in compliance with ISO 14644 and GMP 2010. The product is easy to operate and simple to use with its high resolution, large color touch screen. In addition, the B330 high flow laser particle counter can simultaneously monitor the number of particles and their changes in 8 particle size channels and store up to 10 x 500 sets of data. Typical applications include particle testing in clean rooms, air particle studies, indoor air quality assessment, and also for filter performance testing and cleanliness evaluation.


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Features:

-Flow rate: 28.3 l/min
-Simultaneous display of eight particle size channels
-7 inch high resolution color touch screen
-WIFI direct data export
Audit trail (optional)
Optional external temperature and humidity module
Three levels of authority management
U-disk to guide data, export data format is CSV.


Precautions for particle counter in daily use and maintenance
1、Do not start the dust particle counting instrument when the inlet tube is covered or blocked.
2、The laser particle counter should be used in a clean environment to avoid damaging the laser sensor.
3、It is forbidden to extract gases containing oil and corrosive substances, and do not measure mixed gases that may produce reactions (such as hydrogen and oxygen). These gases may also produce explosions in the counter. Measure these gases need to contact with the manufacturer for more information.
4. Do not sample compressed air without high-pressure decompression equipment (such as a high-pressure diffuser), as all particle counters are designed to operate at an atmospheric pressure.
5, Water, aqueous solutions or other liquids should not enter the sensor from the pipeline.
6, when connecting an external printer or connecting an external temperature and humidity sensor, the counter needs to be turned off first; when performing printing operations, the printer must have print paper, otherwise it will damage the print head.
7、Without professional knowledge and skills training and technical management of professional education staff can not carry out the actual operation and maintenance.
8、When taking samples, avoid taking samples of the gas discharged from the counter itself or the gas contaminated by the counter.
9、When handling the equipment, it must be carefully transported and handled, and should be moved lightly and placed gently, and less affected by vibration and impact. Especially for the dust particle counter, be more careful so as not to damage the internal components.
10、Particle counter is mainly used to test the clean environment of clean room, when the place of measurement has loose particles of material, dust source, spray place, must keep at least twelve inches away from the inlet tube. In order to avoid the above particles and liquid pollution sensor and pipeline.

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