C190H Air Permeability Tester applies volume method, and is used for the gas permeability test of battery diaphragm, breathable membrane and related polymer material.
TQD-G1 is professionally for air permeability test of decorating materials used in cars, e.g. polyurethane, expanded plastics, PVC, leather, textiles, non-woven.
TQD-G1A Air Permeability Tester is used for air permeability test of automotive interior materials and air resistance tester of paper.