Meet the standard: GB/T458, ISO536/2, QB/T1667, GB/T23227, ISO2965, YC/T172, GB/T12655, S05636/3, IS05636/5, GB/T20042.7-2014, GB/T36363-2018, etc Product Advantages: Accurately measures the gas permeability of battery diaphragms and separators. Complies with highly relevant battery-specific standa…