The COVID-19 makes a comeback, how to take precautions?

At present, there are signs of a resurgence of domestic COVID-19.

Therefore, how to do a good job in the prevention of COVID-19 has once again become the top priority of responding to the current situation of COVID-19.

In addition to vaccines, face masks are a good precaution,however, it should be noted that not all masks can be used to prevent COVID-19. Only masks with high safety factors such as KN95 masks and medical surgical masks can prevent COVID-19.At present, it is difficult to guarantee the filtration protection function and quality of masks on the market, especially the masks produced by some small workshops, not only the filtration efficiency parameters are not good enough, but even the masks with rubber bands are broken as soon as they are pulled, it is difficult to guarantee users. security. At this time, the detection of particulate matter filtration efficiency of masks is particularly important, and the detection results of a single mask meltblown cloth are directly related to the safety of users. In our Dongguan Haida Instrument Co., Ltd., there are two products, which are specially designed for testing the filtration efficiency of masks, namely the HD-K405 particulate filtration efficiency tester and the mask bacterial filtration efficiency (BFE) detector .

The filtration efficiency testing equipment is mainly used for the filtration efficiency testing of melt-blown cloth particles. The equipment refers to the standard GB2626-2019 respiratory protective equipment. The particle filtration protection efficiency test produced by Simint uses an aerosol generator as the source of generation, uses a fixture to seal and test the test material, and uses a particle counter to detect the number of particles before and after filtration to complete the filtration of the material. The testing purpose of the efficiency test item is to use the Smart Data acquisition system to record and calculate the current data, and use the touch screen/computer control method to directly output reports and results.

The Bacterial Filtration Efficiency (BFE) detector of the mask is used to test the percentage of bacteria-containing suspended particles filtered by the mask material under the specified flow rate. The dual gas path simultaneous comparison sampling method improves the accuracy of sampling, and is suitable for the performance test of the bacterial filtration efficiency of medical surgical masks by metrological verification departments, scientific research institutes, medical mask manufacturers and other relevant departments.

The two products produced by our Haida Instrument have accurate test results, comprehensive functions, and their parameters meet the national standards, which are widely praised by customers.