INDUSTRY COMPONENT

Wiper/contact

Precision sliding contact component for variable resistance measurement in potentiometers and sensors

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Component Specifications

Definition
A wiper/contact is the critical moving component in potentiometers and certain sensors that maintains electrical contact with a resistive element while sliding along its surface. It functions as the variable tap point, enabling precise measurement of position, displacement, or angular rotation by changing the resistance ratio in the circuit. This component directly determines measurement accuracy, resolution, and signal stability in industrial control systems.
Working Principle
The wiper/contact operates on the principle of variable resistance through physical contact. As it moves along a resistive track (carbon, conductive plastic, or wirewound), it creates an electrical connection at a specific point, dividing the total resistance proportionally to its position. This generates a voltage output corresponding to mechanical displacement, which is measured to determine position, angle, or linear movement in industrial applications.
Materials
Beryllium copper alloy (C17200) with gold plating (0.5-2.0μm), phosphor bronze (C51000), or stainless steel (316L) for corrosive environments. Contact tips often use precious metal alloys (palladium-silver, platinum-iridium) for low contact resistance and wear resistance.
Technical Parameters
  • Travel Life ≥1×10^7 cycles
  • Current Rating 10mA-100mA
  • Operating Force 10-50gf
  • Contact Resistance ≤10mΩ
  • Vibration Resistance 10-2000Hz, 10G
  • Insulation Resistance ≥100MΩ @ 500VDC
  • Operating Temperature -40°C to +125°C
Standards
ISO 9001:2015, IEC 60393-1, DIN 41494

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Wiper/contact.

potentiometer wiper sensor contact sliding contact variable resistor position sensor component industrial potentiometer parts conductive wiper precision contact Wiper/contact Wiper/contact in Computer, Electronic and Optical Product Manufacturing

Parent Products

This component is used in the following industrial products

Potentiometer/Sensor

A variable resistor or sensing device that converts mechanical position into electrical signals within a joystick or control lever.

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Engineering Analysis

Risks & Mitigation
  • Contact oxidation leading to signal drift
  • Mechanical wear causing increased resistance
  • Contamination from industrial particulates
  • Fatigue failure from vibration exposure
FMEA Triads
Trigger: Abrasive wear from particulate contamination
Failure: Increased contact resistance and signal noise
Mitigation: Implement sealed housing with IP67 rating and regular cleaning protocols
Trigger: Material fatigue from high-frequency cycling
Failure: Contact spring fracture and complete signal loss
Mitigation: Use fatigue-resistant alloys and design with appropriate safety factors for expected cycle counts

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±0.5% linearity, ±0.1mm positional accuracy
Test Method
IEC 60393-1 for electrical characteristics, MIL-STD-202 for environmental testing, ISO 16750 for automotive applications

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What causes wiper contact failure in industrial potentiometers?

Primary failure causes include wear debris accumulation, oxidation of contact surfaces, mechanical fatigue from excessive operating force, and contamination from industrial environments. Regular maintenance and proper sealing can extend service life significantly.

How does wiper material affect sensor performance?

Material selection directly impacts contact resistance stability, wear characteristics, and corrosion resistance. Gold-plated beryllium copper offers optimal balance for most applications, while precious metal alloys provide superior performance in harsh environments with minimal oxidation.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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Winding Wire Bonds / Solder Bumps