Summarize the development overview of constant temperature and humidity test chambers
The constant temperature and humidity test chamber can provide environments such as high temperature, low temperature, high humidity, low humidity, alternating humidity or constant test temperature to conduct temperature and humidity tests on products, in order to investigate the impact of temperature and humidity on product performance. To expose various defects and deficiencies in the design, manufacturing, and other aspects of the product, verify the performance of the product under temperature and humidity conditions, and predict the product's service life. Therefore, the constant temperature and humidity test chamber plays an extremely important and irreplaceable role in engineering testing and product testing. It is a testing equipment in the fields of aerospace, aviation, weapons, ships, scientific research, etc.

Overview of the Development of Constant Temperature and Humidity Test Chambers
Developed Western countries started early in the development and production of constant temperature and humidity test chambers. After World War II, developed countries such as the United States, Germany, and Japan began environmental simulation experiments. Nowadays, the relevant technological level of developed countries is very advanced, and their equipment has the characteristics of wide temperature variation range, good temperature uniformity inside the box, fast temperature rise and fall, flexible control, excellent performance, and exquisite appearance. Overview of the Development of China's Constant Temperature and Humidity Test Chamber Industry
China began to establish and develop the environmental testing equipment industry in the 1960s. Before the 1990s, there was little investment in scientific research, limited technology introduction, and overall technological level was relatively backward. After the 1990s, with the development of China's industry, many foreign manufacturers moved in, and domestic R&D investment increased, the environmental testing equipment industry was strongly promoted. At present, some of the constant temperature and humidity test chambers in China are close to the standard. There are more than 100 professional manufacturers in China that have the ability to develop and produce temperature and humidity environmental testing equipment. However, most of them produce standard test chambers, and their technology is not yet sufficient. There are few manufacturers who can design and manufacture non-standard test chambers.