This standard specifies the structure, dimensions, requirements, test methods, inspection rules and marks, Encasement, transportation and storage of the rubber brittle temperature tester for liquid heat transfer media, which is suitable for measuring the brittle temperature of multiple vulcanized rubber samples. The tester consists of a sample holder, an Impact device, a temperature display, a low-temperature chamber and a heat transfer medium, among which the heat transfer medium in the low-temperature chamber should ensure that the sample is submerged below 25mm. The sample holder can hold multiple samples in a cantilever type to ensure that the sample is perpendicular to the center line of the punch of the Impact device when it is impacted.