sed to measure the air permeability of woven fabrics, knitted fabrics, nonwovens, coated fabrics, industrial filter materials and other breathable leather, plastic, industrial paper and other chemical products. Compliant with GB/T5453, GB/T13764, ISO 9237, EN ISO 7231, AFNOR G07, ASTM D737, BS5636, DIN 53887, EDANA 140.1, JIS L1096, TAPPIT251, ISO 9073-15 and other standards.