Hydraulic seal, antifreeze can be directly used as circulating medium; * Design multiple communication data interfaces to make it easy to access various communication networks; * The daily operation of the cable is in front, and the pipeline connection is behind the instrument; * Loop filter ensures that impurities in the application system will not enter the pipeline; * Optional remote control unit can set up the equipment remotely and record the test parameters * It can detect and control the parameters such as flow rate, pump pressure and temperature, which is suitable for testing and evaluating the battery charging and discharging performance and battery life