A Simple Portable Magnetometer Based on Magnets and Hall-Effect Sensors Capable of Measuring Magnetic Properties

A magnetometer based on Hall effect sensors was developed using a 1020 steel base, two magnets (K&J Magnetics, Pipersville, PA, USA), and two Hall effect sensors: MLX-90215 (Melexis Inc., San Jose, CA, USA) and AD-AD22151 (Analog Devices, Inc., Wilmington, MA, USA). Both sensors were assembled o...

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Bibliographic Details
Published in:Applied sciences 2022-12, Vol.12 (24), p.12565
Main Authors: Araujo, Jefferson F. D. F., Junior, Eloi B. M., Mendoza, Leonardo A. F.
Format: Article
Language:English
Subjects:
Aluminum
Design
Dipoles
Electromagnetism
Hall effect
hall magnetometer
Hysteresis
Hysteresis loops
Laboratories
Magnetic fields
Magnetic properties
Magnetism
Magnetite
magnetite microparticles
Nanoparticles
Printed circuit boards
Room temperature
Sensors
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Summary:A magnetometer based on Hall effect sensors was developed using a 1020 steel base, two magnets (K&J Magnetics, Pipersville, PA, USA), and two Hall effect sensors: MLX-90215 (Melexis Inc., San Jose, CA, USA) and AD-AD22151 (Analog Devices, Inc., Wilmington, MA, USA). Both sensors were assembled on an acrylic support and powered with a 5-volt battery. The readings can be taken using bench multimeters (HP 34401A or Iminipa ET-2042D). The magnetometer records magnetic hysteresis loop and saturation by applying a field of up to 0.33 T at room temperature. The device was tested using magnetic hysteresis data from samples of 99% pure nickel sphere and magnetite microparticles. A dipole magnetic model was used to obtain the moment of the samples. The sensor used for reading the induced magnetic field of the sample AD-AD22151 has a sensitivity can be adjusted from to 110 mV/mT. This device is cheap, versatile, and easy to build, and despite its low accuracy, when compared to commercial equipment, it can be useful in low-budget teaching and research laboratories.
ISSN:2076-3417
2076-3417
DOI:10.3390/app122412565