BTT (Beijing Tiandijingyi Technology Co. Ltd.) is a new high-tech enterprise registered in ZhongGuanCun Science and Technology Park. Our company has an excellent designer team who firstly apply the technology of cascade refrigeration system to ultra-low temperature refrigerators in China. Our major is for designing, developing and producing low-temperature chamber such as -86c freezers, freezing dryers, ultra-low temperature liquid dipper and chiller. Our company is the ever-first producer which make the real -86c freezers with the technology of cascade refrigeration system in China! Our products are welcomed not only used in China but also exported to many other countries like UK and Singapore etc. Our expert can design and install customized cryogenic equipment everywhere in the world. Product Description: The"TIANHAN" series of ultra-low temperature refrigerators based on various internationally best-known brand components and German cascade refrigeration system. The technology of this refrigerator, as is to be expected from the ergonomic design, provides optimum operation and reliable function. "TIANHAN" series of ultra-low temperature refrigerators are very popular in China because of their considerate designing and best quality. Our techniques keep the leading position in China and can reach to that of in import product. If you are looking for a high-density biological storage solutions for the laboratory, please contact us! "HANJI" -100 ultra-low temperature chiller are applied for Parylene vacuum deposition systems