Draw-wire transducers use a drum on which a measuring wire is wound. A rotary encoder or potentiometer connects to the spring-loaded drum, which automatically retracts the wire to an angular position. A minidraw unit is available in 1 or 2-m lengths with incremental or analog outputs. Units from 2 to 40 m provide incremental, absolute, or fieldbus outputs. Typical applications include cranes, elevators, forklifts, and scissor jacks.
Turck Inc. USA, 3000 Campus Dr., Minneapolis, MN 55441, (800) 544-7769, www.turck.com