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Learn about the function and classification of air sampler

air sampler is an instrument or device that collects air pollutants or polluted air after many customers visit our factory. There are many kinds of them, which can be divided into gas sampler and particle sampler according to the collection object; According to the place of use, it can be divided into environmental sampler, indoor sampler and pollution source sampler. In addition, there are special-purpose atmospheric samplers, such as those that collect gas and particulate matter at the same time. Gas sampler is generally composed of collector, flowmeter and pumping power system

the atmospheric sampler plays a good role in the detection of harmful gases in the air and the environment. With the continuous progress of science and technology, atmospheric samplers are also constantly launching new products, such as: intelligent atmospheric samplers, explosion-proof atmospheric samplers, dual gas path atmospheric samplers and other products, which greatly enrich the classification of atmospheric samplers

with the decline of the profitability of China's paper industry, the national capital pays more and more attention to environmental problems, and more and more enterprises produce products with environmental protection instruments such as atmospheric samplers. It is precisely because of the continuous development and research of scientific research teams led by these entrepreneurs that today's atmospheric sampler is more accurate and has more complete functions. Such as: Tianrui instrument, Xinbao technology, etc

atmospheric sampler is only a part of sampling instruments, including individual sampler, dust sampler, dust poison sampler, explosion-proof sampler, etc

gas sampler is generally composed of collector, flowmeter and pumping power system

collector: there are generally the following types: ① absorption tubes: bubble absorption tubes and porous glass absorption tubes, which are mainly used to absorb gaseous or vapor pollutants, and the latter can also collect fog aerosols, such as sprayed pesticide emulsions. The impact absorption tube is mainly used to collect soot and particles. ② Filter material sampling clip: used to collect smoke and particles. The filter material is inorganic, such as glass fiber membrane and quartz filter membrane; There are also organic substances, such as acetic acid or nitric acid fiber membrane, fluororesin membrane, polytetrafluoroethylene membrane and nylon membrane. Recently, the organic filter membrane, which is hit by nucleons into a certain pore size, is widely used, also known as nuclear pore filter membrane. ③ Solid particle sampling tube: silica gel, ceramic fragments or other solid particles can be installed in the tube to collect gaseous or foggy pollutants. ④ Gas collection pipe, syringe and vacuum bottle are used to collect a small amount of gaseous pollutants. Generally, the collector for collecting samples in the flue extends into the flue with a probe. The structure is slightly different from the above sampling clip, but its effect is similar

flowmeter: generally, orifice or rotor flowmeter is used to measure air flow. It can also be equipped with automatic flow control components to ensure the stability of air flow during sampling

pumping power system: it is actually a vacuum pumping system. Electric vacuum pump, scraper pump, membrane pump, electromagnetic pump or other air extraction pump are usually used. The electric vacuum pump has large air extraction capacity and can be configured on a large flow sampler. Scraper pump, membrane pump and electromagnetic pump have small air extraction volume, but they are light in weight and easy to carry. They can be configured on small flow sampler

particulate matter sampler is commonly used for filtration sampling, which can be roughly divided into two categories:

General particulate matter Sampler: collecting particles within a certain particle size range. The reasons for the error of the test results of this sampler pressure testing machine are divided into large flow sampler (generally, the air extraction is 1.1-1.7 meters per minute) and small flow sampler (the air extraction is less than 20 liters per minute). Large flow sampling 9 Outlet of exhaust fan: the particle size collected by the sampler with a diameter of 150mm (exhaust fan is installed at the rear of the box) can be as large as 40-60 microns, and the sampling is greatly affected by the wind speed and direction

particle size grading Sampler: there are two main types. One is the impact grading sampler with multi-layer orifice structure. Particles enter the sampler with the air flow, and through the orifice plates with different apertures, particles with different particle sizes are separated and left on each layer of filter membrane. Nowadays, the impact classification sampler designed generally collects particles with particle size less than 15 microns, and there are classification types of various stages below 10 levels. For example, Anderson multi-stage impact sampler has various types of 6-10 levels. The particle size separator (slit type or round hole type metal plate) can also be installed on the collector of the above large flow sampler, which becomes a large flow impact graded sampler. The other is a dual channel sampler, which uses the inertia of particles in the air flow to divide particles with a particle size of less than 15 microns into two parts greater than and less than 3.5 microns with a nozzle, enter two channels respectively, and collect them on the filter membrane. There are also various types of particulate matter sampler, such as strip filter sampler, timed continuous filter sampler, etc

the above is the use and maintenance of the instrument. In addition, our company also specializes in the production of digital constant temperature oscillator, large shaking table, quartz sub boiling high-purity water distiller, desktop electric centrifuge, adjustable high-speed homogenizer, magnetic stirrer, nitrogen blower, sampler and other instruments. If you have any questions about our products, please contact us

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