Hangzhou Kelin Electric Co., Ltd. engages in the research, development, production, and sale of electric power products in China. The company's products include online monitoring systems; intelligent environmental control devices; and switching station intelligent environmental control systems, temperature and humidity sensors, intelligent maintenance-free respirators, and on-load tap-changer insulating oil online filtration systems. It also offers live detection kits, such as partial discharge sensors and intelligent vacuum sampling valves. The company was founded in 2002 and is based in Hangzhou, China.