Draw Wire Position Sensor

The Draw Wire Position Sensor, often called a "string pot" or potentiometric position sensor, is designed to measure linear movement over a distance up to 750mm. It's commonly used in motorsport to track suspension travel, steering movement, or any other component that moves in a straight line. It offers a compact and highly accurate way of measuring displacement and position.

Why Choose the Draw Wire Position Sensor String Pot

Once installed and configured in Race Studio, you can log and analyse the movement data alongside all your other channels, giving you a clear picture of how your car or bike is behaving on track. The Draw Wire Position Sensor String Pot provides precise, repeatable linear position data; is easy to install and route in tight spaces; works in harsh environments, and integrates directly with Aim data systems via an analogue input.

How the Draw Wire Position Sensor Works

The Draw Wire Position Sensor consists of a spring-loaded spool with a thin, durable wire (the "string") attached. One end of the sensor is fixed to the chassis or a reference point, and the wire is attached to the moving part you want to measure (like a suspension arm). As the component moves, the wire extends or retracts, turning the spool inside the sensor. This movement is converted into a variable electrical signal (usually a changing resistance or voltage), which your Aim logger or dash reads as a position value.

Please Note: Mount the sensor through three screws M2.5 DIN 931 or mounting clamps. The sensor does not have to be oriented in a particular way. Choose the installation position so that damage and soiling of the measuring wire are avoided.

Technical Information

Technical Specs

  • Robust plastic housing
  • Conductive plastic, wire, hybrid potentiometer
  • Smallest design in its class
  • Output: E/E830
  • Measuring Range: 750mm
  • Linearity: +0.375mm
  • Resolution: 6.7 pulses/mm - 0.15mm
  • Temperature Range: -20°C. +80°C
  • Material: Plastic
  • Wire Mounting: Eyelet
  • Sensor Mounting: Mounting holes/grooves
  • Protection Class: IP54
  • Weight: 45g

Warnings

  • Do not open the sensor housing
  • Do not let the wire snap back without control
  • Avoid banging or knocking the sensor
  • Don't let the power supply exceed its limits
  • Fix the sensor with a drawn in measuring wire to the target
  • Do not damage the measuring wire
  • Do not oil or grease the measuring wire at an angle
  • Do not allow to loop of the measuring wire around objects

SKU: SUS-POT

Diagram

Included in the Box

Downloads

String Pot Sensor User Guide
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Race Studio 3