These articles are all highly relevant mask filter tester. I believe this information can help you understand mask filter tester's professional information. If you want to know more, you can contact us at any time, we can provide you with more professional guidance.
1. BackgroundAt the beginning of 2020, COVID19 pandemic started from Wuhan China. Filter material testing becomes very necessary and important. It also called PFE (particle filtration efficiency) test. It means how many percentages of particles are blocked by filter material in a maskWe used to
