The filter efficiency testing equipment is primarily designed for assessing the protective effectiveness and filtration efficiency of products containing filters or filter meshes in the market, as well as measuring flow resistance. The testing equipment is designed and manufactured based on relevant testing standards and the specific requirements of end users. The test bench utilizes a cold-generated aerosol generator and our company's proprietary gas aerosol testing device for particle size generation. It adjusts pressure to output continuous and stable aerosol particles. The laser counter employs an imported high-precision particle detection sensor to measure samples both before and after filtration. A differential pressure transmitter calculates the pressure difference between the upstream and downstream, deriving data such as resistance value, flow rate, and filtration efficiency during the testing process