Editorial Technical Reference

Magnetic Field Sensors

This page explains how Magnetic Field Sensors is classified within Basic Metal Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

Devices that detect and measure magnetic field strength and direction within electromagnetic stirring systems.

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Magnetic Field Sensors in a manufacturing environment
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Product Specifications

Technical details and manufacturing context for Magnetic Field Sensors

Definition
Magnetic field sensors are specialized components integrated into industrial-grade continuous casting mold electromagnetic stirrers. They monitor and provide real-time feedback on magnetic field characteristics, ensuring precise control of electromagnetic stirring forces that influence molten metal flow and solidification patterns during continuous casting processes. These sensors operate by detecting changes in magnetic flux density using various technologies such as Hall effect, magnetoresistive, or fluxgate principles, converting magnetic field variations into proportional electrical signals for measurement and control systems. Typical specifications include a measurement range of ±100 mT, sensitivity of 0.1–1 mV/V/mT, accuracy of ±0.5% FS, response time of less than 10 ms, operating temperature from -40 to 85 °C, supply voltage of 24 V DC ±10%, output signal of 4–20 mA, ingress protection rating of IP67 per IEC 60529, housing material of 316L stainless steel per ASTM A240, and weight ranging from 0.5 to 1.5 kg. These values are reference ranges and must be confirmed for the specific model and application. The sensors are designed for harsh industrial environments, with corrosion-resistant housing and dust-tight protection. They are essential for maintaining optimal stirring conditions, which directly affect the quality and consistency of the cast product. For selection, consider the required measurement range, sensitivity, accuracy, response time, and environmental conditions. Interface with control systems via the 4–20 mA output signal. Verification should include checking calibration against known magnetic field sources and ensuring compliance with the listed standards. Maintenance signals include drift in output, increased noise, or failure to respond to field changes. Failure boundaries include exposure to temperatures outside the specified range, mechanical damage, or electrical overstress. Always verify model-specific values and standards with the legal manufacturer or supplier.
Working Principle
Magnetic field sensors detect changes in magnetic flux density using technologies such as Hall effect, magnetoresistive, or fluxgate principles. These sensors convert magnetic field variations into proportional electrical signals, typically a 4–20 mA current loop, which are then processed by control systems to adjust stirring parameters. The sensing element, often a semiconductor or ferromagnetic core, responds to the magnetic field, and the resulting signal is conditioned and amplified for accurate measurement. The response time is typically less than 10 ms, enabling dynamic control of the stirring process.
Common Materials
Semiconductor materials (e.g., silicon), Ferromagnetic cores, Copper windings, Protective housing materials
Technical Parameters
ParameterTypical rangeNotes & selection driver
Measurement Range±100 mTTypical range for electromagnetic stirring systems
Sensitivity0.1–1 mV/V/mTHigher sensitivity improves resolution
Accuracy±0.5 % FSIncludes linearity and hysteresis
Response Time<10 msFast response for dynamic control
Operating Temperature-40–85 °CExtended range available on request
Supply Voltage24 ±10% V DCReverse polarity protected
Output Signal4–20 mATwo-wire loop powered
Ingress ProtectionIP67Dust-tight and protected against immersionIEC 60529
Housing Material316LCorrosion resistant for harsh environmentsASTM A240
Weight0.5–1.5 kgDepends on cable length and connector

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

Components / BOM
  • Sensing Element Part
    Core component that directly interacts with magnetic fields to generate measurable signals
    Material: Semiconductor or ferromagnetic materials
  • Signal Conditioning Circuit
    Amplifies and processes raw signals from sensing element for accurate measurement
    Material: Electronic components on PCB
  • Protective Housing Part
    Shields sensitive components from environmental factors and mechanical damage
    Material: Stainless steel or industrial-grade plastics
  • Connector Interface
    Provides electrical connection to control systems and power supply
    Material: Industrial-grade connectors with corrosion-resistant coatings

Application & selection

Application Fit & Sizing Matrix

Operational Limits
pressure: Atmospheric to 10 bar (standard), up to 50 bar (specialized)
other spec: Magnetic field range: ±2 mT to ±2 T, slurry concentration: ≤40% solids by volume
temperature: -40°C to +85°C
Media Compatibility
✓ Molten aluminum (non-ferrous metals) ✓ Steel casting ladles (ferrous metals) ✓ Glass manufacturing melts
Unsuitable: High-vibration environments with >5g acceleration (causes signal noise)
Sizing Data Required
  • Required magnetic field measurement range (mT/T)
  • Distance from stirring coil to sensor mounting point (mm)
  • Required response time/frequency (Hz)

Risk, maintenance & compliance

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Signal drift or loss
Cause: Contamination buildup on sensing face (e.g., ferrous particles, scale) interfering with magnetic field detection, or degradation of internal electronics due to temperature cycling or moisture ingress.
False triggering or erratic output
Cause: External electromagnetic interference (EMI) from nearby motors, drives, or power lines, or physical misalignment/damage to the sensor or target affecting the magnetic coupling.
Maintenance Indicators
  • Intermittent or unstable readings on the connected monitoring system (e.g., PLC/DCS alarms for signal fluctuation)
  • Visible physical damage, corrosion, or excessive debris accumulation on the sensor housing or sensing face
Engineering Tips
  • Implement regular cleaning schedules for the sensor face using non-abrasive methods and ensure proper sealing/gaskets to prevent contamination and moisture ingress.
  • Install EMI shielding (e.g., conduit, ferrite cores) and maintain adequate separation from high-power electrical equipment; verify and secure sensor alignment during installation and routine checks.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable Standards
EN 50178:1997 - Electronic equipment for use in power installations

Quoted from the published standard.

Manufacturing Precision
  • Sensitivity: +/-2% of full scale range
  • Linearity: +/-0.5% of full scale output
Quality Inspection
  • Temperature Cycling Test (-40°C to +125°C for 100 cycles)
  • Magnetic Field Calibration Verification against NIST-traceable standards
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.

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Manufacturers of Magnetic Field Sensors

Manufacturer profiles associated with Magnetic Field Sensors.

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Frequently Asked Questions

What is the typical measurement range of these sensors?

The typical measurement range is ±100 mT, but this should be confirmed for the specific model and application.

What output signal do these sensors provide?

They provide a 4–20 mA output signal, which is a standard industrial current loop for transmitting measurement data.

What is the operating temperature range?

The operating temperature range is -40 to 85 °C, but extended ranges may be available on request.

What ingress protection rating do they have?

They have an IP67 rating per IEC 60529, meaning they are dust-tight and protected against immersion.

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

Related equipment

Industrial Ecosystem & Supply Chain Structure

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

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 · Page last updated 12 October 2026

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