This equipment adopts imported dual compressor refrigeration technology, thermal balance principle and circulating stirring method to achieve automatic uniform cooling and constant temperature of the sample, which can fully meet the various temperature control indicators specified in the national standard GB-229-2002. This equipment is simple and convenient to operate, with high working efficiency. It is the most ideal sample cooling and heat preservation equipment in the low-temperature impact test of materials. It can also be used for other low-temperature detection and testing work.This equipment adopts imported dual compressor refrigeration technology, thermal balance principle and circulating stirring method to achieve automatic uniform cooling and constant temperature of the sample, which can fully meet the various temperature control indicators specified in the national standard GB-229-2002. This equipment is simple and convenient to operate, with high working efficiency. It is the most ideal sample cooling and heat preservation equipment in the low-temperature impact test of materials. It can also be used for other low-temperature detection and testing work.