This type of test chamber can be used in areas like electrician, electronics, meters, materials and coating/plating, which require them to conduct accelerated heat/humidity experiment as well as long-term heat/humidity test with permanent temperature and humidity. The product has several advantages, e.g. firm and reliable control, appealing look, precision of control in temperature and humidity, and conform with rules GB/T2423.3-93, which standardize the way to test electrician or electronic products under invariable heat and humidity.