HY3720A/B Ozone Test Chamber is used to estimate the resistance of vulcanized or thermoplastic rubbers to cracking when exposed, under static or dynamic tensile strain, to air containing a definite concentration of ozone and at a definite temperature in circumstances that exclude the effects of direct light. This machine conforms to ISO 1431, GB/T 7762, etc. This instrument complies with the following international and industry standards. ISO: ISO 1431. GB/T: GB/T 7762. Technical Specification Model: HY3720AHY3720BTypeFor static tensile testFor dynamic tensile test Dimensions: of working chamber 500×500×600mm (D×W×H)Ozone concentration 10~1000pphmOzone concentration deviation≤10% Temperature range: RT+10℃~＋50℃ Temperature fluctuation: ±0.5℃ Temperature uniformity: ±2℃ Timing range: 0~999hRotating speed of specimen rack1~17r/min adjustable Air flow: 2～25L/min Power supply: AC380V 50Hz