Constant temperature and humidity test chamber is also called high low temperature constant temperature and humidity test chamber, high and low temperature test chamber, programmable can simulate all kinds of temperature and humidity environment, mainly for electronics, electrical, household appliances, automobile spare parts and materials and other products under the condition of constant heat and humidity, high temperature, low temperature and alternating hot and humid test, test the technical specifications of the products and adaptability. Can also be used for all kinds of textiles, fabric before the test of temperature and humidity balance.