What Is a Particle Counter?

Particle Counter is a term used in the gas industry. Usually divided into laser particle counters or condensed particle counters.

Particle counter

Particle Counter is a term used in the gas industry. Usually divided into laser particle counters or condensed particle counters.

He2Ne laser particle counter can analyze particle impurities with a particle size of 011m in the gas; Ar2Kr laser particle counter can analyze particle impurities with a particle size of 0105m. Currently there are particle counters that can detect 01005m in ultra-high purity gas. Condensing particle counter can measure nanometer particles. When selling particle counter measuring instruments, a legal calibration certificate must be issued in accordance with the requirements of JJF1190-2008 "Dust Particle Counter Calibration Specification".

Chinese name

Particle counter

Foreign name

Particle Counter

Category

Laser particle counter

Analysis

011m particle size in gas

Use

Testing air dust particles

Particle counter is used to test air dust particles.

Particle counter is an instrument that uses the principle of light scattering to count dust particles. Light scattering is related to factors such as particle size, light wavelength, particle refractive index, and particle absorption characteristics. But in terms of the intensity of scattered light and the size of particles, there is a basic rule that the intensity of scattered light of particles increases with the surface area of particles. In this way, a certain amount of dust-containing gas passes through a strong beam of light, causing the particles to emit scattered light, which is projected onto a photomultiplier tube through a condenser lens, which changes the light pulse into

1. According to the test principle: light scattering method test (white light, laser), microscope method test, weighing method test,

Different types of particle counters will have some differences in terms of function and operation interface, but the basic operation steps are similar:

1. Turn on the power and warm up.

2. Set the working parameters. If you do not need to change them, you can skip them. For specific key operations, refer to the product introduction of each instrument. Note that the setting is invalid in the sampling state.

3. After setting, you can start sampling and reading data.

4. Connect the printer and export the data for printing. Some products with a built-in printer can print directly.

1.The particle counter is stipulated by the state

Pay attention to the following points in daily use and maintenance:

1. When the inlet tube is covered or blocked, do not start the counter

2. It should be used in a clean environment to prevent damage to the laser sensor.

3. It is forbidden to extract the gas containing oil and corrosive substances, and do not measure the mixed gas (such as hydrogen and oxygen) that may produce a reaction. These gases may also explode inside the counter. Test these gases with the manufacturer for more information.

4. Do not sample compressed air without high-pressure decompression equipment (such as high-pressure diffusers). All counters are designed to operate at one atmosphere. The working position and sampling port of the instrument should be under the same pressure and temperature and humidity environment to ensure the normal operation of the instrument.

5. No water, solution or other liquid can enter the sensor from the inlet tube.

6. The particle counter is mainly used to test the clean environment of the purification workshop. When the measured area has loose particles, dust sources, and sprays, it must be kept at least 12 inches away from the inlet pipe. To prevent the above particles and liquid from contaminating the sensor and pipeline.

7. When sampling, avoid sampling the gas contaminated by the gas discharged from the counter itself.

8. When connecting an external printer or connecting an external temperature and humidity sensor, you must first turn off the counter; when performing the printing operation, there must be printing paper on the printer, otherwise the print head will be damaged.

9. When handling, it should be handled lightly and lightly, with less vibration and impact. Especially for desktop particle counters, be careful to avoid damaging internal components.