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INDUSTRY COMPONENT

Sensing Coil

A sensing coil is an electromagnetic component used in sensing probes/heads to detect changes in magnetic fields, electrical currents, or proximity of metallic objects.

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Component Specifications

Definition

A sensing coil is a wound conductor, typically made of copper wire, that generates or detects electromagnetic fields. As part of a sensing probe or head, it operates based on electromagnetic induction principles to measure parameters like displacement, position, speed, or presence of metallic targets in industrial applications. It converts physical phenomena into electrical signals for processing by control systems.

Working Principle

The sensing coil works on electromagnetic induction: when a metallic object enters its magnetic field, eddy currents are induced in the object, altering the coil's inductance or impedance. This change is measured to detect object presence, position, or properties. In active systems, an alternating current passes through the coil to generate a magnetic field, while in passive systems, it senses external field changes.

Materials

Copper wire (typically enamel-insulated), with core materials like ferrite, iron powder, or air core; encapsulation in epoxy resin or thermoplastic housings for protection.

Technical Parameters

Inductance 10 μH to 100 mH
Resistance 5 Ω to 500 Ω
Wire Gauge AWG 20 to 40
Insulation Class Class B to H
Temperature Range -40°C to 150°C
Operating Frequency 1 kHz to 1 MHz

Standards

ISO 9001, IEC 60034, DIN EN 60529

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Sensing Coil.

Parent Products

This component is used in the following industrial products

Sensing Probe/Head

The detection element of a speed sensor that directly interacts with the target to measure rotational or linear velocity.

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Engineering Analysis

Risks & Mitigation

Overheating due to excessive current
Mechanical damage from vibration or impact
Signal interference from electromagnetic noise
Degradation from moisture or chemical exposure

FMEA Triads

Trigger: Wire insulation breakdown
Failure: Short circuit or open circuit
Mitigation: Use high-quality insulation materials, perform regular insulation resistance testing

Trigger: Core material saturation
Failure: Reduced sensitivity or nonlinear response
Mitigation: Design with appropriate core material and operating within specified magnetic flux limits

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Inductance tolerance typically ±5% to ±10%, resistance tolerance ±10%

Test Method

Inductance measured with LCR meter at specified frequency; insulation resistance tested with megohmmeter; functionality verified with target simulation in operational environment

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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Serial interface for industrial data transmission between IoT gateways and legacy equipment using RS-232/422/485 protocols.

I/O Connectors

Industrial I/O connectors are ruggedized interfaces that enable reliable data and power transmission between sensors, actuators, and Industrial IoT Gateways in harsh environments.

Frequently Asked Questions

What is the difference between a sensing coil and a regular coil?

A sensing coil is specifically designed for detection applications, with optimized inductance and frequency response for sensitivity to external objects, whereas regular coils may be for power transfer or filtering.

How do I select a sensing coil for my application?

Consider factors like target material, sensing distance, operating frequency, environmental conditions (temperature, humidity), and required output signal type (analog/digital).

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.