Draw wire sensors offer a simple solution to measure linear speed and position. Utilizing a flexible cable, a spring-loaded spool, and a sensor, draw wire sensors can precisely measure linear position. Draw wire sensors do not need precise linear guidance and are ideal for wet, dirty, or outdoor environments and applications where your measuring range travels over harsh environments. These include applications in iron, steel, and wood (saw mills, joineries).

Draw wire sensors are also known in the industry as cable transducers, cable-extension transducers, string potentiometers, draw wire transducers, yo yo pots, linear position string pots, and string encoders.

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Shanghai Qiyi Electrical & Mechanical Equipment Co., Ltd. is a professional rotary encoder supplier, located in Chinese business and port center, Shanghai. CALT brand product ranges: Optical incremental rotary encoder, single-turn and multi-turn absolute encoder, draw-wire position sensor and couplings, and other instruments, which widely used in CNC machinery, textile machinery, steel rolling machinery, linear guide system, hydraulic system, lifting machinery and servo motor, all get a very good reputation! Qiyi company has got independent import and export qualification in 2013, CALT brand products have been exported to Southeast Asia, Europe, America and Russia and other countries and regions in the world.