Linear Position Sensor 25-300mm for Industrial Displacement Measurement

1. Product Overview

The JW-KPM(S06) KPM Linear Position Sensor is a rod-type industrial displacement transducer designed to measure linear movement and provide continuous position feedback.

With measuring strokes from 25 mm to 300 mm, the sensor uses a conductive plastic resistance element to convert mechanical movement into a proportional electrical signal.

Unlike compact linear potentiometers designed mainly for restricted mounting spaces, the KPM series features rod-end bearings at both ends, allowing suitable mechanical connections where moderate angular movement or alignment variation may occur.

The sensor is particularly relevant to:

• Prestressed jack displacement measurement
• Bridge and structural movement monitoring
• Shock absorber and suspension testing
• Ceramic manufacturing equipment
• Industrial actuator position feedback
• Mechanical testing systems

The KPM series is intended for applications where reliable mechanical coupling and continuous linear displacement measurement are required.

2. How Does a KPM Linear Position Sensor Work?

The JW-KPM(S06) uses a conductive plastic potentiometric sensing element.

As the connected mechanical component moves, the sensor rod follows the displacement.

The internal sliding contact changes position along the resistance element, producing a position-related electrical signal.

Measurement process:

Mechanical Movement → Rod Displacement → Resistance Change → Signal Conditioning → PLC / Data Acquisition System

The sensor measures the relative movement between its two mechanical connection points.

Unlike a non-contact laser or ultrasonic distance sensor, the KPM requires direct mechanical linkage with the moving structure.

Benefits of Rod-End Bearings

The rod-end bearing design helps accommodate angular movement between connected components.

This mechanical arrangement can be useful in testing equipment, hydraulic mechanisms and structural displacement measurement.

The specified ±12.5° angular accommodation does not eliminate the need to avoid excessive side loads, overtravel or unsuitable installation geometry.

3. Technical Specifications

Technical Note: Linearity, resolution and absolute measurement accuracy are different specifications. Actual performance depends on stroke selection, mechanical installation and electrical configuration.

4. KPM Rod-End Linear Sensor vs KTM Mini Linear Sensor

The JW-KPM and JW-KTM sensors share overlapping measuring ranges but are designed for different installation requirements.

Choose the KPM series where mechanical linkage design and angular movement accommodation are important.

For compact machinery requiring small mounting dimensions, consider the Mini Linear Displacement Sensor 25–300mm.

5. Industrial Applications

5.1 Prestressed Jack Displacement Measurement

Prestressed jack testing requires measurement of mechanical extension during controlled loading operations.

A rod-end linear position sensor can be used to measure jack extension when the mounting arrangement and required measuring stroke are compatible.

The rod-end joints help accommodate appropriate angular movement within the mechanical linkage.

5.2 Bridge and Structural Movement Monitoring

Structural inspection and testing may require measurement of relative displacement between two mechanical points.

Potential measurement applications include:

• Bridge expansion joint movement
• Structural relative displacement
• Mechanical joint movement
• Controlled structural load testing

The KPM sensor can provide displacement feedback where its environmental protection, mounting arrangement and measurement performance meet project requirements.

Long-term outdoor deployment may require additional environmental protection.

For related applications, explore JW-IoT’s Industrial IoT Monitoring Solutions.

5.3 Shock Absorber and Suspension Testing

Automotive component testing often involves repeated linear movement under dynamic conditions.

The KPM sensor can be considered for measuring:

• Shock absorber displacement
• Suspension component movement
• Mechanical actuator travel
• Test rig position feedback

Correct mechanical installation is essential to prevent excessive transverse loading.

5.4 Ceramic Machinery

Ceramic processing equipment can require measurement of mechanical movement during production.

The KPM series provides continuous position-related feedback for compatible machine assemblies.

Applications may include stroke monitoring, mechanical adjustment and actuator position measurement.

5.5 Industrial Automation and Hydraulic Systems

Industrial equipment frequently uses linear position feedback to monitor mechanical motion.

The KPM can be connected to suitable hydraulic actuator mechanisms, automated testing equipment and mechanical positioning systems.

The receiving controller must support the selected sensor output or include suitable signal conditioning.

6. Output Signals and PLC Integration

Potentiometric Resistance Output

The KPM sensor uses a resistive sensing element to provide continuous position-related electrical feedback.

A compatible input circuit is needed to interpret the potentiometric signal.

Optional Analog Output Modules

Depending on the selected configuration, suitable signal-conditioning modules may provide voltage or current outputs for industrial controllers.

Output module specifications and power requirements must be confirmed before ordering.

Integration Architecture

KPM Linear Position Sensor → Signal Conditioning Module → PLC / Data Logger → Industrial Monitoring System

This arrangement enables mechanical displacement data to be collected and processed by compatible equipment.

For remote applications, a communication gateway may be added to transmit acquired position data to a monitoring platform.

7. KPM Linear Position Sensor vs Other Displacement Technologies

Different measurement principles suit different mechanical conditions.

For longer machine strokes, see the Linear Displacement Sensor 75–1250mm.

For flexible cable-based displacement monitoring, consider the Draw Wire Displacement Sensor 0–1000mm.

For small contact measurements requiring automatic return, explore the Self Return Linear Displacement Sensor 5–100mm.

8. Installation Recommendations

Mechanical Alignment

Install the sensor so the intended measurement movement is compatible with the rod axis and connection geometry.

Rod-End Connection

Use suitable mounting hardware and verify that the rod-end joints operate within their permitted angular range.

Avoid Overtravel

Select a measuring stroke that covers the complete operating movement without exceeding the sensor limits.

Protect Electrical Connections

Follow the supplied wiring documentation and protect cables and connectors from mechanical damage and unsuitable environmental exposure.

Verify Measurement Scaling

Check sensor feedback at known mechanical positions before putting the monitoring or control system into operation.

9. How to Select the Correct KPM Sensor

Before selecting a model, confirm:

1. Measuring stroke: Required travel between 25 mm and 300 mm.
2. Linearity: Required full-scale linearity specification.
3. Mechanical connection: Rod-end dimensions and installation geometry.
4. Motion conditions: Expected operating speed, vibration and angular movement.
5. Output signal: Resistance, voltage or current.
6. Operating environment: Temperature, moisture, dust and mechanical exposure.
7. Mounting dimensions: Available body length and extension clearance.

JW-IoT can assist with configuration selection based on project requirements.

10. Request Technical Specifications and Quotation

Looking for a KPM rod-end linear position sensor for prestress testing, structural monitoring or industrial displacement measurement?

JW-IoT can support product selection based on measuring stroke, mechanical connection, output requirements and application conditions.

Contact JW-IoT to request technical specifications, configuration information and a quotation.