HLP190FS(BS) - Spring-Loaded Linear Potentiometer

Product Brand: Penny & Giles

The HLP190 range of hybrid spring-loaded linear potentiometers provide the facility for single or dual electrical output with a body diameter of only 19mm.

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  • Stroke lengths from 25 to 150mm
  • 19mm body diameter
  • Spring loaded shaft with ball anvil fitting
  • Flange [FS] or Body clamp [BS] mounting
  • Virtually infinite resolution
  • Single or dual track option

The HLP190 range of hybrid linear potentiometers provides the facility for single or dual electrical output with a body diameter of only 19mm. Suited to a wide range of industrial applications for medium stroke length requirements – especially structural monitoring data acquisition.

Stroke lengths are from 25mm to 150mm, with a choice of body clamp (BS) or flange (FS) mounting. This model is supplied with a spring-loaded shaft, biased to the fully extended position.

All other models in the HLP190 series (HLP190/SA, HLP190/BC, and HLP190/FL models) have been replaced by the SLS190 range.

Hybrid track potentiometers feature a high wiper contact resistance; therefore, operational checks should be carried out only in the voltage divider mode. Therefore, hybrid track potentiometers should be used only as voltage dividers, with a minimum wiper circuit impedance of 100 x track resistance or 0.5MΩ (whichever is greater). Operation with wiper circuits of lower impedance will degrade the output smoothness and affect the linearity.

  • Electrical output: Single or dual – minimum of 0.5% to 99.5% applied volts
  • Resolution: Virtually infinite
  • Hysteresis (repeatability): Less than 0.01mm
  • Phasing between elements: 0.5mm total in a retracted position (multi-output units)
  • Operational temperature °C: –30 to +85
  • Output smoothness: To MIL-R-39023 grade C 0.1%
  • Insulation resistance: Greater than 100MΩ at 500Vdc
  • Operating mode: Voltage divider only - see Circuit Recommendation below
  • Wiper circuit impedance: Minimum of 100 x track resistance or 0.5MΩ (whichever is greater)
  • Life at 250mm per second: Typically greater than 100 million operations (50 x 106 cycles) at 25mm stroke length
  • Shaft velocity maximum m/s: 1
  • Shaft seal: No seal fitted due to spring-loaded probe action

Linear Potentiometer Benefits

  • Inexpensive
  • Long life expectancy
  • Robust
  • High accuracy
  • High repeatability
  • Suitable for a variety of applications
  • Functions in wide temperature ranges


What is a linear potentiometer?

A linear potentiometer is a position sensor used to measure displacement along a single axis, either up and down or left and right. Typically they are rod actuated and connected to an internal slider or wiper carrier. The rod is connected to the object that requires movement. As linear potentiometers are a contacting type of sensor, the moving parts have to touch and means they have to be significantly robust. 

Where are linear potentiometers used?

Linear potentiometers are used in a variety of different applications, including these industries:

  • Mobile vehicle

  • Agricultural machinery

  • Test/ lab applications

  • Medical

  • Robotics

  • Industrial processing

  • Industrial machinery

  • Motorsport

What is the difference between a potentiometer and LVDT?

LVDTs are non-contacting sensors, whereas linear potentiometers operate as contacting sensors. 

What are the different types of potentiometers?

There are three different types of potentiometers classified by their operation, rotary potentiometer, linear potentiometer, and digital potentiometer. The most commonly used of the three is the rotary potentiometer. 

Rotary Potentiometer

An excellent example of this is the volume controller on a stereo and other music-playing devices. This is due to the rotating knob used to control the supply to the speaker. Rotary potentiometers convert rotary motion into varying resistance.

Linear Potentiometer

Linear Potentiometer functions similarly to the rotary potentiometer, but instead of the semi-circular resistance, they operate as a linear resistor with a sliding contact. Both ends of the linear resistor are connected across the source or input voltage; the output is taken between the sliding contact. 

Digital Potentiometers

Digital Potentiometers or Digi POT can provide the most accurate measurements among potentiometers. 

HLP190FS(BS) - Spring-Loaded Linear Potentiometer