DC series program-controlled deep cryogenic treatment device is mainly for materials of cryogenic and low temperature processing, low temperature and flame and aging/stress release or samples frozen need different cooling rates are developed. Using the latest in heating technology, control technology and liquid nitrogen fraction, so that the programmed temperature, constant temperature, cooling the process uniform. Using liquid nitrogen as a refrigerant, meet the cooling and environmental requirements. Products are widely used in mechanical engineering, genetic engineering, pharmaceuticals, food processing, medical research, plant conservation, aviation, farming and other fields. Products include a variety of specifications, according to users ' needs and design a variety of non-standard sizes