Rain test chamber is a test instrument to test whether the waterproof is good, the figure of this equipment can be said to be everywhere, applied in various places. Small to our usual use of cell phones, flashlights and other lighting apparatus; large to the aerospace industry, lighting systems, signaling device testing and so on. Waterproof has always been a lot of industry can not get around a topic, a lot of equipment once the rain and other wet, its service life will be greatly reduced, this equipment in the waterproof performance test link plays a vital role.