Schematic of apparatus
(Click figure to enlarge)
Hall voltage vs Current
(Click graph to enlarge)
Magnetic field distribution in solenoid
(Click graph to enlarge)
Features
Compact and sensitive integrated Hall element
Easy to operate
Stable and reliable performance
Introduction
Measuring the magnetic field distribution of a powered solenoid using a Hall device is a key experiment in science and engineering physics education. The LEEI-38A Solenoid Magnetic Field Measurement Apparatus is an innovative instrument that employs an integrated linear Hall device to measure weak magnetic fields with high accuracy. This eliminates common issues found in traditional instruments, such as low sensitivity, voltage interference, and instability caused by solenoid temperature rise.
This apparatus enables students to:
- Understand the principles of an integrated linear Hall element.
- Learn how to measure magnetic fields using Hall sensors.
Designed with protective mechanisms for both the power supply and sensor, this instrument ensures durability and reliability during use.
Students can perform the following experiments using this apparatus:
1. Measure the sensitivity of a Hall sensor.
2. Verify the proportional relationship between the output voltage of a Hall sensor and the magnetic field intensity inside a solenoid.
3. Determine the relationship between magnetic field intensity and position within the solenoid.
The instruction manual includes detailed experimental configurations, theoretical principles, step-by-step procedures, and examples of experiment results. For more information, please click Experiment Theory and Contents to explore this apparatus further.
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)
