Magnetoresistive Sensor & Measuring Earth's Magnetic Field for Electromagnetism Physics Lab

This Magnetoresistive Sensor & Measuring Earth's Magnetic Field for Electromagnetism Physics Lab is designed for studying the Earth's magnetic field and the principles of weak magnetic field measurement using magnetoresistive sensing technology. The apparatus employs a high-sensitivity Permalloy magnetoresistive sensor together with a precision rotary base and Helmholtz coil system to accurately measure geomagnetic field components, magnetic declination, and total magnetic field intensity. The system provides an effective platform for investigating geomagnetism, sensor calibration, magnetic field analysis, and modern magnetic sensing techniques.

Physics Lab Experiments from Atico Exports.

Experimental Principle and Content

• Measure Weak Magnetic Fields Using a Magnetoresistive Sensor
• Determine the Sensitivity of a Magnetoresistance Sensor
• Measure the Horizontal Component of the Earth's Magnetic Field
• Measure the Vertical Component of the Earth's Magnetic Field
• Calculate the Geomagnetic Declination Angle
• Determine the Total Geomagnetic Field Intensity
• Study the Operating Principles of Magnetoresistive Sensors
• Perform Calibration of Magnetic Field Sensors

Educational Objectives

• Understand the Principles of Magnetoresistive Sensing Technology
• Learn Techniques for Measuring Weak Magnetic Fields
• Study the Characteristics of the Earth's Magnetic Field
• Investigate Geomagnetic Field Direction and Intensity
• Develop Practical Skills in Sensor Calibration and Magnetic Measurements
• Gain Experience in Experimental Data Analysis and Interpretation

Magnetoresistive Sensor :

• Permalloy Magnetoresistive Sensor
• Operating Voltage: 5 V
• Sensitivity: 50 V/T
• Suitable for Weak Magnetic Field Measurement

Rotary Base Assembly :

• Precision Rotary Base Plate
• Horizontal and Vertical Leveling Adjustment
• Accurate Sensor Positioning and Alignment

Helmholtz Coils :

• Number of Turns: 500 Turns per Coil
• Coil Radius: 100 mm
• Used for Magnetic Field Calibration and Compensation

DC Constant Current Source :

• Adjustable Output Range: 0–199.9 mA
• LCD Digital Display

DC Voltmeter :

• Measuring Range: 0–19.99 mV
• Resolution: 0.01 mV
• LCD Digital Display

Standard Supply

• Main Experimental Unit × 1
• Magnetoresistive Sensor Assembly × 1
• Rotary Base with Leveling Adjustment × 1
• Helmholtz Coil Set × 1
• DC Constant Current Source × 1
• DC Voltmeter × 1
• Connection Wires × 1 Set
• Instruction Manual × 1

• Rotary Base Plate with Adjustable Leveling
• High-Sensitivity Magnetoresistive Sensor
• Measures Horizontal and Vertical Components of the Earth's Magnetic Field
• Determines Geomagnetic Declination and Total Field Intensity