Gester Instruments | Professional Textile, Footwear and PPE Testing Equipments Manufacturers Since 1997
Interpretation of the principle of meltblown cloth filter tester1
The automatic filter material detector can quickly and accurately measure the filtration efficiency of filtration protective equipment and materials. Salt aerosol or oily aerosol can be used as the test carrier, which meets the requirements of the NIOSH standard of the US Occupational Safety and Health Administration. The automatic filter tester adopts advanced technology and microprocessor control. It is designed with a good user interface and setting method, which can simplify training and operation. The test results are displayed directly, which is intuitive and convenient. Filter material testing machine (G506); Aerosol Type: Sodium Chloride; Particle Number Median Diameter: 0.075μm; particle distribution geometric standard deviation≤1.86; Concentration measurement range: 1.0～200 mg/m3; Flow range: 15～100 L/min; Efficiency measurement range: 0%～99.999%; Low temperature temperature and humidity control test box (SETH-100L); Temperature range: - 40～+150 ℃; temperature fluctuation≤0.5 ℃; humidity range: 0～99% RH; humidity fluctuation≤1.0% RH. Filtration efficiency BFE detector (ZR-1000); to 0.3μFiltration efficiency of particles above m≥99.99%; aerosol generator mass median diameter: 3.0μm; geometric standard deviation≤1.5; Peristaltic pump flow: 0.006 to 3.0 ml/min. Pressure difference test device (Qingdao Zhongrui); flow rate: 85L/min. Test principle Oil mist method: dry oil-free compressed air enters the aerosol generator at a certain flow rate to generate aerosol with a certain particle distribution, which is screened by a cascade impactor, and the particles with a particle size distribution that meet the standard requirements are discharged from the aerosol outlet. , into the test pipeline. And reach the filter material. Differential pressure sensors are installed on both sides of the filter material. During the test process, the number of particles in the upstream and downstream of the filter material is monitored; the entire test process is carried out with a certain flow or air volume. Salt spray method: Dry oil-free compressed air enters the aerosol generator at a certain flow rate to generate aerosol with a certain particle distribution, and is sieved by a cascade impactor, and the particles with a particle size distribution that meet the standard requirements are discharged from the aerosol outlet and enter Test the pipeline. Due to the static electricity generated by the salt spray aerosol, it is necessary to neutralize the salt spray aerosol. And for salt mist aerosol, it needs to be heated to generate salt particles. The method is as follows: mixing the aerosol that meets the particle size requirements with heating gas, and then the water in the aerosol is evaporated to generate salt particles. And reach the filter material. Differential pressure sensors are installed on both sides of the filter material. During the test process, the number of particles in the upstream and downstream of the filter material is monitored; the entire test process is carried out with a certain flow or air volume.
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Cut resistance is one of the most critical performance indicators in personal protective equipment (PPE) testing, directly affecting worker safety in high-risk industries such as metal processing, machinery manufacturing, and emergency rescue. The TDM Cut Test Machine GT-KC28 plays a vital role in accurately evaluating the cut resistance of PPE products, including gloves, protective clothing, footwear materials, composite materials, rubber, and industrial textiles.
By adopting high-precision force control systems, intelligent data processing, and stable transmission technology, the GT-KC28 TDM Cut Tester can accurately measure the critical cutting force of materials and ensure excellent repeatability and comparability of test results. Its user-friendly touch-screen operation, comprehensive data storage, USB data export, and built-in thermal printer greatly improve laboratory efficiency and data traceability.
The TDM Cut Test Machine GT-KC28 fully complies with major international and national standards such as ISO 13997, EN 388, ASTM F2992/F2992M, ANSI/ISEA 105, and GB 24541-2022, making it a reliable solution for PPE manufacturers, third-party testing laboratories, and research institutions. Through precise and standardized cut resistance testing, the GT-KC28 helps reduce industrial cutting injuries, supports PPE certification across global markets, and ensures that protective equipment delivers reliable safety performance in real-world applications.
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