Constant temperature and humidity chamber can accurately simulate the low temperature, high temperature, high temperature and high humidity, low temperature and low humidity and other complex natural-like environment, the laboratory is generally used for plant cultivation, breeding test; bacteria, microbial cultivation, fermentation, a variety of thermostatic testing, environmental testing, water analysis, BOD determination, microbial culture material denaturation test and culture medium, serum, drugs and other items such as storage. Widely used in medical and health care, biological medicine, agricultural research, environmental protection and other research applications. Constant temperature and humidity test chamber, also known as constant temperature and humidity testing machine, constant temperature and humidity test chamber, constant temperature machine or constant temperature and humidity chamber, used for testing materials in a variety of environments under the performance of the equipment and test a variety of materials heat-resistant, cold-resistant, dry, humidity-resistant properties. Suitable for electronics, electrical appliances, communications, instrumentation, vehicles, plastic products, metal, food, chemical, building materials, medical, aerospace and other products to test the quality of use.