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. 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 multiple industries. Located in Shanghai we enjoy convenient air, water and land transportation. brbrWe welcome potential buyers to contact us.