The CDW-802XT low-temperature impact testing instrument is a compressor refrigeration equipment newly developed by our company according to the requirements of JB5376-91 "Technical Conditions for Low Temperature Bath" and GB/T 229-2007 "Charpy Notch Impact Test Method for Metal Materials". The equipment achieve automatic uniform cooling and constant temperature of the sample, which can fully meet the national standard GB/T 229-2007, American standard ASTM E23-02a, European standard EN10045 , ISO148 and other relevant standards specified in the relevant temperature control indicators. The device can realize digital display temperature value, automatic temperature control, automatic timing, automatic alarm and other functions.