1, water quality and stability and algaecide can be used directly as a circulating water tap to solve the circulating water restrictions. 1) using the original double-insulated design, the main barrel and the outside temperature and the heat exchange rate in the bucket to a minimum. 2) The instrument is equipped with automatic temperature control device, using a compressor refrigeration system with a dedicated heating device can automatically control the temperature of the external bucket, tub after each test temperature change <0.1 ℃, make the results more accurate, real play the automatic calorimeter advantage. 3) for 24 hours to test the experimental procedure and Foreign barrel temperature change ± 0.05 ℃, ensure stable performance of the instrument for a long time. 2, the water level inside the barrel automatic balancing device, the first to siphon water balance principles to solve the water level probe positioning allowed deficiencies and ensure its long-term stability of the heat capacity. 3, special ignition urging means oxygen bomb ignition success rate of 100%. 4, the overall water tank using standard industrial seamless stainless steel welding, key components forming stamping, welding caused because there is no tank to rust and other issues. 5, with the brand of computer and laser printers, so that all functions of the instrument to maximize