INDUSTRY COMPONENT

Sensor Coil

Sensor coil is an electromagnetic component in stator/sensor head assemblies that detects position, speed, or proximity through inductive principles.

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Component Specifications

Definition
A sensor coil is a precision-wound electromagnetic component typically integrated into stator assemblies or sensor heads of industrial machinery. It functions as an inductive sensing element that generates or responds to electromagnetic fields to detect rotational position, angular displacement, linear movement, or proximity of metallic targets. These coils convert mechanical motion into electrical signals through electromagnetic induction, enabling precise monitoring and control in automated systems.
Working Principle
Operates on electromagnetic induction principles. When a metallic target moves relative to the coil, it alters the coil's inductance or induces eddy currents. This change in electromagnetic properties generates voltage variations that are processed to determine position, speed, or proximity. In stator applications, multiple coils may be arranged to detect rotor position through phase-shifted signals.
Materials
Copper magnet wire (typically 24-36 AWG) with polyurethane, polyester, or polyimide insulation. Core materials: ferrite, powdered iron, or air core. Encapsulation: epoxy resin or thermoplastic housing. Terminal connections: gold-plated brass or phosphor bronze.
Technical Parameters
  • Q Factor 20-100 at specified frequency
  • Inductance 10μH to 100mH
  • Resistance 5Ω to 500Ω
  • Voltage Rating 50V to 1000V AC/DC
  • Frequency Range 1kHz to 1MHz
  • Insulation Class Class B (130°C) to Class H (180°C)
  • Operating Temperature -40°C to +150°C
Standards
ISO 26262, IEC 60034, DIN EN 61800

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sensor Coil.

sensor coil inductive sensor stator coil position sensor speed detection electromagnetic component industrial sensor machine monitoring Sensor Coil in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Stator/Sensor Head

The stationary component of a position encoder/resolver that houses the sensing elements for detecting rotational position.

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Engineering Analysis

Risks & Mitigation
  • Insulation breakdown from thermal cycling
  • Mechanical damage from vibration
  • Corrosion in humid environments
  • Electromagnetic interference from nearby equipment
  • Signal drift from material degradation
FMEA Triads
Trigger: Thermal stress exceeding insulation rating
Failure: Short circuit between windings
Mitigation: Implement temperature monitoring, use higher insulation class materials, improve cooling
Trigger: Vibration-induced mechanical fatigue
Failure: Wire breakage or connection failure
Mitigation: Use vibration-resistant encapsulation, secure mounting, strain relief on leads
Trigger: Moisture ingress
Failure: Corrosion and insulation degradation
Mitigation: Apply conformal coating, use sealed housings, maintain proper environmental controls

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Inductance ±5%, Resistance ±10%, Dimensional ±0.5mm
Test Method
LCR measurement at specified frequency, Hi-pot testing (500V AC for 1 minute), thermal cycling (-40°C to +125°C, 100 cycles), vibration testing (10-2000Hz, 10g)

Buyer Feedback

★★★★☆ 4.6 / 5.0 (30 reviews)

"The Sensor Coil we sourced perfectly fits our Machinery and Equipment Manufacturing production line requirements."

"Found 38+ suppliers for Sensor Coil on CNFX, but this spec remains the most cost-effective."

"The technical documentation for this Sensor Coil is very thorough, especially regarding technical reliability."

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Frequently Asked Questions

What is the difference between sensor coils and regular inductor coils?

Sensor coils are optimized for sensitivity to external metallic objects and precise signal generation, while regular inductors focus on energy storage and filtering with stable inductance values.

How do I test a faulty sensor coil?

Measure inductance with an LCR meter, check resistance for opens/shorts, perform insulation resistance tests, and verify signal output with an oscilloscope during target movement.

Can sensor coils be repaired or must they be replaced?

Damaged windings typically require complete replacement due to precision winding requirements, though terminal connections can sometimes be repaired if accessible.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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