Electromagnetism

Schematic of apparatus

(Click figure to enlarge)

Hall voltage vs Current

(Click graph to enlarge)

Magnetic field distribution in solenoid

(Click graph to enlarge)

LEEI-38A Solenoid Magnetic Field Measurement Apparatus

Features

• Compact and sensitive integrated Hall element

• Easy to use

• Stable and reliable

Introduction

Using a Hall device to measure the magnetic field distribution of a powered solenoid is an important experiment in science and engineering physics education. This innovative solenoid magnetic field measurement instrument uses an integrated linear Hall device to measure weak magnetic fields with high accuracy. Hence, problems such as low sensitivity, voltage interference, and instability (due to solenoid temperature rising) existing in traditional instruments are eliminated.

Using this apparatus, students can understand the principle of an integrated linear Hall element and learn how to use it to measure magnetic fields. With protective devices for power supply and sensor, this instrument is durable.

Using this apparatus, the following experiments can be performed:

1. Measure the sensitivity of a Hall sensor

2. Verify the output voltage of a Hall sensor proportional to the magnetic field intensity inside the solenoid

3. Acquire the relationship between the magnetic field intensity and position inside the solenoid

Main Parts and Specifications

 Description Specifications Integrated Hall sensor Magnetic field measurement range: -67 ~ +67 mT, sensitivity: 31.3 ± 1.3 V/T Solenoid length: 260 mm, inner diameter: 25 mm, outer diameter: 45 mm, 10 layers 3000 ± 20 turns, length of uniform magnetic field in center: > 100 mm Digital constant-current source 0 ~ 0.5 A Current meter 3-1/2 digit, range: 0 ~ 1999 mA, resolution: 1 mA Volt meter 3-1/2 digit, range: 0 ~ 199.9 mV, resolution: 0.1 mV

Schematic of apparatus

(Click figure to enlarge)

Hall voltage vs Current

(Click graph to enlarge)

Magnetic field distribution in solenoid

(Click graph to enlarge)