Shanghai Hengxiang Optical Electronics Co.,Ltd is a professional manufacturing corporation,main operation includes research and development of rotary encoder, the manufacture of optical lens, etc. Also, we can design production of optics,mechanics and electronics for clients, according to their special requirements. Since been develped and expanded for so many years, our rotary encoder has already have 20 series and including more than 100 sorts, and exported around the world . Rotary encoder ...