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Functional Principle, Technical Data
wireSENSOR, WPS
2. Functional Principle, Technical Data
2.1 Functional Principle
With the wire principle, a linear motion is transformed into a change in resistance by a rotation.
A measuring wire made of highly flexible stainless steel wires is wound onto a drum with the aid of a long life
spring motor.
The winding drum is coupled axially with a
• multi-turn potentiometer (Type WPS-...-MKxx-...-P/U/I) respectively with an
• encoder (Type WPS-...-MKxx-E).
Fig. 1 Draw-wire sensor with potentiometer
2.2 Structure
The draw wire principle is used in the housing design MK30, MK46, MK77, MK60 , MK88 and MK120 with dif-
ferent measuring lengths from 50 to 7500 mm (1.69 to 295.2 in).
Two versions of the electrical connection are possible:
- Potentiometer output (resistance divider)
- Incremental encoder (with integral electronics, HTL or TTL output)
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