Sensing Coil: Temperature Range -40°C to 150°C

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

Parameter	Typical range	Notes & selection driver
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

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

IEC 60034, DIN EN 60529

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Sensing Coil

Manufacturer profiles associated with Sensing Coil.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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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).

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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.

Sensing Coil