Due to smallsize, ease of use, high accuracy, and suitability for measurementof both AC and DC magnetic fields,

Hall device has been widelyused to measure magnetic fields.

Together with otherdevices, it is used for automaticcontrol and measurements of position, displacement, speed, angle,and other physical quantities.This apparatus is mainlypurposed to help students understand the principle of Hall effect,measure the sensitivity of a Hall element,and learn how to use a Hallelement to measure magnetic field intensity.

It has followingattractions: 1. GaAs Hall element has highsensitivity, wide linear range, and small temperaturecoefficient.

2. Small working current ofHall element yields stable and reliable experimentaldata.

3. Visible shape andstructure of test sample and Hall element yield intuitiveresult.

4. Durable instrumentincorporates protective mechanism.

The following experiments canbe performed:

1. Acquire the relationshipbetween the Hall current and the Hall voltage under a DC magneticfield.

2. Measure the sensitivity ofa GaAs Hall element.

3. Measure the magnetizationcurve of silicon steel material using a GaAs Hallelement.

4. Measure a magnetic field distribution alonghorizontal direction using a Hall element.