... the packaging's permeability with high precision, reliable, stable, Oxygen Permability rate Tester – Coulometry theory Method Standards:ASTM D 3985-1995 ... Parameter itemY201DY204DTest range0.02~16500 CM3/M2/day (with large the test chamber, the max testing range ... Automatic test, use friendly,2, High-precision sensors with over-range protection, continuous data collection, accurate and reliable ...