Tube type pump-free type samplers

Abstract

The utility model relates to a sampler, in particular to a tube non-pump sampler, aiming at providing a tube non-pump sampler with compact size, simple and convenient operation, safety and reliability. The utility model adopts the technical proposal of comprising a sleeve, an diffusion tube, a copper net and an activate carbon; wherein, the copper net is lined internally inside the diffusion tube; the activated carbon is filled inside the copper net; the diffusion tube is closed at one end and an diffusion tube cover is arranged at the other end; the diffusion tube is sleeved inside the sleeve which is closed at one end; a locating convex ring is arranged at both ends of the diffusion tube; a locating convex ring cooperated with the locating convex ring of the diffusion tube is arranged at unclosed end of the sleeve; expansion holes are evenly arranged on the diffusion tube. The utility model has the advantages of meeting good result in sampling ratio, absorption capacity and sample stability and other performances and providing wide prospect for application fields such as environment monitoring, occupational health and sanitation and anti-epidemic station for giant potential in miniaturization, economization and portability.

Description

technical field [0001] The invention relates to a sampler, in particular to a tube-type pumpless sampler. Background technique [0002] At present, a commonly used instrument for determining the content of styrene, benzene, toluene, xylene, etc. in the air is an active sampler, that is, a pump sampler, which collects gaseous or vaporous pollutants in the solvent through pumping power, and its The advantages are: it can accurately measure the content of chemical substances in a certain volume of air; its disadvantages are: it is not suitable for continuous long-term (8h) sampling; it needs an air pump as the power of air extraction, and it needs to consume a certain amount of power; it is large in size, It is inconvenient to carry. [0003] It is precisely because of the existence of some shortcomings of active samplers that people need to develop a new type of sampling instrument to overcome the above shortcomings, and this new type of sampler requires no power, easy to car...

AI Technical Summary

Problems solved by technology

[0002] At present, a commonly used instrument for determining the content of styrene, benzene, toluene, xylene, etc. in the air is an active sampler, that is, a pump sampler, which collects gaseous or vaporous pollutants in the solvent through pumping power, and its The advantages are: it can accurately measure the content of chemical substances in a certain volume of air; its disadvantages are: it is not suitable for continuous long-term (8h) sampling; it needs an air pump as the power of air extraction, and it needs to consume a certain amount of power; it is large in size, Inconvenient to carry

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