ZHEJIANG LONGYOU JL Electronic CO., LTD. is a special producer of automation components such as photo electric switches and mark sensors. The company was established in 1986 and its products quality has been appraised in the year of 1988. In 2003, its white light source transferable mark sensor was appraised hi-tech product of Zhejiang Province. The company has several patents. After development of nearly 30 years, the company at present owns a standard factory of 10 mu, 2000 square meters, facilitated by 2 full auto production lines.