Products

Sensor Magnet Products for OEM Buyers

Sensor magnet categories for industrial OEM sourcing, from Hall and reed switch magnets to multipole rings, diametric magnets, micro magnets, and custom magnetic assemblies.

Use this page as a pre-RFQ navigator: pick the magnet family, capture the correct engineering inputs, and move directly to sample validation criteria your engineering and procurement teams can approve.

Hall effect sensor magnets for OEM sensing assemblies

Reed switch magnets for proximity sensors

Multipole ring magnet for rotary sensing

How to Select the Right Path

Define the sensor type, air gap, target switching or signal behavior, and available magnet envelope.
Confirm material, coating, magnetization direction, tolerance, and assembly environment.
Decide whether you need loose magnets, oriented packaging, or a controlled magnetic subassembly.
Set sample acceptance criteria for dimensions, polarity, magnetic output, and packaging before quotation freeze.

Selection evidence

Start with the magnetic function, then freeze geometry

The same-looking magnet can behave differently once air gap, sensor axis, housing wall, coating, and polarity datum are fixed. Product families are organized around how engineering teams evaluate the sensor output, not only around magnet shape.

Hall Effect Sensor Magnets

Custom magnets for Hall effect position, proximity, speed, and switching sensors, with OEM support for geometry, tolerance, coating, and magnetic orientation.

Best for OEM engineering teams selecting magnets around a fixed Hall IC, PCB position, and housing envelope.

Disc, cylinder, ring, block, and carrier-mounted magnet options
Axial, diametric, radial, and project-specific magnetization review
NdFeB, ferrite, SmCo, and AlNiCo selection based on temperature and signal target

View details

Reed Switch Magnets

Magnets for reed switch actuation in proximity, level, door, and safety sensing applications, with focus on pull-in distance, polarity, and repeatable assembly behavior.

Best for switch manufacturers and equipment OEMs that need stable operate and release distance in production.

Magnets for glass reed switches, float assemblies, door contacts, and proximity housings
Material and size selection around operate/release distance targets
Coating and encapsulation review for humid or outdoor applications

View details

Multipole Ring Magnets

Multipole ring magnets for rotary sensing, speed feedback, encoders, and commutation reference systems where pole count, phase alignment, and runout matter.

Best for OEMs that need a repeatable magnetic pole pattern matched to an angular sensor or speed pickup.

Custom pole count and magnetization pattern review
Ring, arc, and rotor-carrier options for rotary sensor packages
Support for Hall, magnetoresistive, and encoder-style sensing concepts

View details

Diametric Sensor Magnets

Diametrically magnetized cylinders, discs, and rings for rotary angle sensing, level sensors, and compact magnetic position systems.

Best for engineers using the rotating field of a diametric magnet as the sensing reference.

Diametric cylinders, discs, rods, and ring options
Magnetization direction review for angle and rotary sensing
Material and coating selection around temperature, corrosion, and bonding

View details

Micro Sensor Magnets

Small precision magnets for compact electronics, medical devices, miniature sensors, and space-constrained industrial modules.

Best for buyers whose design is limited by small space, assembly handling, and tolerance stack-up.

Small disc, cylinder, block, and custom-shape magnets
Tight handling, packaging, and polarity controls for miniature parts
Material and coating review for corrosion, bonding, and cleaning process fit

View details

Custom Magnetic Assemblies

Factory support for magnets integrated into carriers, plastic housings, metal parts, floats, shafts, and sensor modules where assembly orientation matters.

Best for OEM buyers who want to reduce internal assembly risk by sourcing a magnet as a controlled subassembly.

Magnet plus carrier, insert, bracket, cup, float, or rotor support
Assembly orientation, polarity, adhesive, and fixture review
Prototype-to-production workflow for OEM programs

View details

Reference magnet samples for sensor validation

Calibration and Reference Magnets

Reference magnets and controlled magnetic targets for sensor calibration, production test fixtures, threshold checks, and incoming inspection workflows.

Best for quality, test, and engineering teams that need repeatable magnetic reference samples rather than general-purpose loose magnets.

Reference magnets for Hall, reed, magnetometer, and magnetic switch checks
Geometry, material, coating, and marking aligned to fixture use
Packaging and labeling controls for repeatable test-station handling

View details

Cross-Family Evaluation Snapshot

Product Family	Primary Buyer Focus	Key Metric	Why It Matters
Hall Effect Sensor Magnets	Best for OEM engineering teams selecting magnets around a fixed Hall IC, PCB position, and housing envelope.	Material selection: NdFeB, SmCo, ferrite, or AlNiCo by application	Material choice controls signal strength, temperature stability, corrosion strategy, and cost.
Reed Switch Magnets	Best for switch manufacturers and equipment OEMs that need stable operate and release distance in production.	Actuation distance: Buyer-defined pull-in and release window	The magnet must switch reliably without causing unwanted activation or missed states.
Multipole Ring Magnets	Best for OEMs that need a repeatable magnetic pole pattern matched to an angular sensor or speed pickup.	Pole count: Project-defined	Pole count determines resolution, pulse frequency, and sensor compatibility.
Diametric Sensor Magnets	Best for engineers using the rotating field of a diametric magnet as the sensing reference.	Diametric axis control: Marked or fixture-controlled by agreement	Angle-sensing assemblies depend on consistent magnetic axis orientation.
Micro Sensor Magnets	Best for buyers whose design is limited by small space, assembly handling, and tolerance stack-up.	Part size and handling: Sub-miniature to compact sensor magnets	Very small magnets need practical packaging and assembly planning, not only a drawing quote.
Custom Magnetic Assemblies	Best for OEM buyers who want to reduce internal assembly risk by sourcing a magnet as a controlled subassembly.	Assembly retention method: Adhesive, press-fit, overmold, fixture, or mechanical lock	Retention choice affects durability, magnetic alignment, tooling, and unit cost.
Calibration and Reference Magnets	Best for quality, test, and engineering teams that need repeatable magnetic reference samples rather than general-purpose loose magnets.	Reference purpose: Switch check, comparison sample, fixture target, or inspection reference	A reference magnet must be specified around the test decision it supports.

Material and Validation Data Buyers Usually Need

Sensor magnet selection is not only a shape choice. Material, coating, magnetization direction, operating temperature, tolerance stack-up, and proof method decide whether the final sensor sees a repeatable field at the required gap.

Material	Best Fit	Engineering Watch Item
Sintered NdFeB	Compact high-flux Hall, encoder, and position sensor targets	Needs coating review, demagnetization margin, and temperature-grade selection
Bonded NdFeB	Molded pole patterns, thin rings, and cost-sensitive multi-pole targets	Lower magnetic output than sintered grades; validate pulse amplitude and tolerance stack-up
SmCo	High-temperature, corrosion-sensitive, or high-reliability sensor modules	Higher material cost and brittleness; fixture testing still required
Alnico	Stable reference magnets and some calibration-style magnetic fixtures	Lower coercivity can increase demagnetization risk in compact assemblies
Ferrite / ceramic	Cost-sensitive reed, proximity, and appliance sensing programs	Larger volume may be required for the same air-gap signal

Gaussmeter and polarity mapping

Checks surface field, pole orientation, and batch consistency before assembly release

Limit: Surface gauss alone does not prove sensor output at the final air gap

Sensor threshold fixture

Confirms Hall operate/release, reed pull-in/drop-out, or encoder pulse repeatability

Limit: Must include housing thickness, adhesive, PCB offset, and adjacent metal where relevant

BH / demagnetization review

Screens material grade, temperature exposure, and irreversible loss risk

Limit: Requires real duty-cycle and environment data from the buyer

VSM-style material characterization

Supports deeper material comparison when qualification evidence is required

Limit: Available only when the project scope requires formal material evidence

Permanent Magnet Handling Notes

Final applications should validate pinch risk, brittle magnet handling, coating damage, corrosion exposure, temperature limits, and pacemaker-sensitive environments. Safety-critical sensor programs should freeze drawings only after fixture-level magnetic and mechanical validation.

Featured Products

A selection of sensor magnet and magnetic assembly references from our product portfolio.

Inquiry Email

[email protected]

Email app

Include drawing, dimensions, material, coating, magnetization, quantity, and delivery location.

Instant Chat

+86 18857971991

Chat on WhatsApp

Direct channel for RFQ details and engineering clarification.