The constant temperature and humidity test chamber, also known as a constant temperature and humidity tester, constant temperature and humidity experimental box, constant temperature machine, or constant temperature and humidity box, is a device used to test the performance of materials under various environmental conditions and to evaluate their resistance to heat, cold, dryness, and humidity.

The rain test chamber accurately simulates the IPX5 and IPX6 waterproof tests. The nozzle diameter is 6.3mm/12.5mm. The water flow rate is 12.5L/min or 100L/min. The water pressure is 30kPa/100kPa.

Frost formation in a thermal shock test chamber is a sublimation phenomenon where moisture inside the chamber condenses under low-temperature conditions. But why does this happen? Is it simply because the chamber temperature is too low?