Shanghai Kaidi provides various types of servicesSpeed measuring motorWe are authorized agents for RADIO-ENERGIE, POSITAL, Fenner, ELTRA, and other products such as photoelectric encoders, rotary encoders, tilt sensors, absolute value encoders, overspeed switches, incremental encoders, and Fenner from the UK. Our overspeed switch and encoder products are affordable and of more reliable quality. If you have any needs, we welcome you to call us for consultation:.