Magnetic Sensors

Overview

Product Specifications

Types & Key Metrics:

Hall Sensors

Field Range: 1–100 mT;  Response Time: ~1 µs; Power Supply: 2–30 VDC; Output: Analog (voltage) or digital (switch)

Materials: InSb (antimony indium), GaAs (gallium arsenide), or silicon-based, with operating currents of 2–10 mA

Magnetoresistive Sensors (MR/GMR):

Sensitivity: 0.1–10 mV/V/mT; Linearity: ±0.5% FS; Temperature Range: -40°C to +150°C

Reed Switches:

Activation Field: 10–100 mT; Lifecycle: Up to 10^6 cycles; Contact Rating: 0.5–10 W

Design Features:

Packaging: IP67/IP69K for harsh environments (e.g., automotive, food processing)

Integration: IC-compatible designs (e.g., CMOS Hall sensors) for miniaturization

Product Grades

Standard Grade: General-purpose Hall sensors for consumer electronics (e.g., smartphone compasses)

Industrial Grade: Ruggedized MR sensors for automotive (e.g., wheel speed detection) or factory automation (e.g., position sensing)

High-Performance Grade: Precision GMR sensors for medical imaging (e.g., MRI) or aerospace (e.g., navigation systems)

Applications

Automotive:

Position/Speed Sensing: Crankshaft/camshaft detection, ABS systems

Current Monitoring: Battery management in EVs

Industrial:

Motor Control: Brushless DC motors in HVAC fans or robotics

Flow Measurement: Liquid/gas flow meters with magnetic impellers

Consumer Electronics:

Smart Device: Screen rotation (e.g., smartphones), lid detection (e.g., laptops)

Healthcare:

Biomagnetic Sensing: Heart rate monitors or MRI equipment

FAQs

How to choose between Hall and MR sensors?

Hall sensors suit low-field detection (e.g., proximity switches), while MR/GMR sensors excel in high-precision applications (e.g., angle measurement)

Temperature drift issues?

Built-in compensation circuits (e.g., temperature-stable GaAs Hall sensors) mitigate drift

Installation tips for reed switches?

Avoid mechanical stress; align with magnetic actuation direction (gap ≤2 mm)

Can sensors detect non-ferrous metals?

No—only ferromagnetic or magnetized materials (e.g., steel gears)

Lead time for custom designs?

Typically 4–8 weeks for specialized configurations (e.g., high-temperature variants)