Physics Lab Equipment

LEEI-45 Magnetoresistive Effect Experimental Apparatus

LEEI-45 Magnetoresistive Effect Experimental Apparatus

Note: oscilloscope not included


  • Simple and reliable structure

  • Rich experiment contents

  • Affordable


Due to the high sensitivity and strong anti-interference ability, magnetoresistive sensors have wide applications in communications and industrial instrumentation such as: digital compass, vehicle testing, navigation systems, counterfeit detection, position measurement, and so on. InSb sensor is a typical magneto-resistance sensor due to its affordability and high sensitivity.


This experimental apparatus is simple and informative. It uses a GaAs Hall sensor to measure the magnetic field intensity and the magneto-resistance values of an InSb magnetoresistive sensor under different magnetic field intensities.


Using this instrument, the following experiments can be conducted:


1. Study the resistance change of an InSb sensor vs the applied magnetic field intensity; find the empirical formula.

2. Plot InSb sensor resistance vs magnetic field intensity.

3. Study the AC characteristics of an InSb sensor under a weak magnetic field (frequency-doubling effect). 

Main Parts and Specifications

Power supply of magneto-resistance sensor0-3 mA adjustable
Digital voltmeterrange 0-1.999 V resolution 1 mV
Digital milli-Teslameterrange 0-199.9 mT, resolution 0.1 mT

LEEI-45 Magnetoresistive Effect Experimental Apparatus.png

Curve of magnetoresistive effect

LEEI-45 Magnetoresistive Effect Experimental Apparatus.png

Frequency doubling effect

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