Sensor Coil: Frequency Range 1kHz to 1MHz

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

Parameter	Typical range	Notes & selection driver
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

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

Standards

ISO 26262, IEC 60034, DIN EN 61800

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

Typical Suppliers & Equivalents

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)

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 Sensor Coil

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

BTCOIL

Dongguan, Guangdong, CN

Listed on the company's own website · profile compiled by CNFX from public sources

Listed there as: “SENSOR COIL WINDING”
View source page ↗ btcoil.com · checked 2026-09-05

View profile Send enquiry

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

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 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.

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.

Sensor Coil