C201B Oxygen Transmission Rate Tester is a basic model with one test cell to measure oxygen transmission rate of packaging materials. Support temperature control.
C206H Oxygen Transmission Rate Tester, also Oxygen Permeability Tester is to measure OTR of packaging materials based on the coulometricsensor method and conforms to ASTM D3985.
C230 Oxygen Transmission Rate (OTR) Tester is designed and manufactured based on the coulometric sensor method (aka. equal pressure method) and conforms to ASTM D3985.