Plastics external filter Grey 25mm

External filters are commonly used in sampling tube kits to increase the purity of the sample and reduce the effects of outside contaminants on the sample. These filters can be installed on the outside of the sampling tube to ensure that the gas or liquid entering the sampling system is purer by intercepting airborne particles, microorganisms and other impurities.   The selection and use of an external filter needs to be determined by the specific sampling needs, such as how large the particulate matter needs to be filtered out and whether microorganisms need to be removed. Common filter materials include, but are not limited to, cellulose, polypropylene, and fiberglass, which have different filtration efficiencies for different sizes of particulate matter.   When using them, it is necessary to pay attention to: 1. select the appropriate filter material according to the nature of the sampled material. 2. Ensure that the pore size of the filter is appropriate for the desired filtration…

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