Shanghai QiYi Electrical & Mechanical Equipment Co., Ltd is a technology industrial enterprises integrating R & D, production, agency and sales. our company focus on the rotary encoders, displacement sensors and proximity sensor with CALT brand, and also the agency of CARLO GAVAZZI. We have many years of experience in supplying rotary encoders and sensors, which widely used in CNC machine, steel rolling machinery, linear guide systems, hydraulic systems, lifting machinery, turbine and other ...