Real-Time Measurement and Analysis of Magnetic Fields Using Data Logger

¹ Department of Physics Education, Universitas Negeri Jakarta, Jl. Rawamangun Muka, Jakarta 13220, Indonesia
² Department of Information System, Kalbis University, Jl. Pulomas Selatan, Jakarta 13210, Indonesia
³ Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001 Leuven, Belgium
⁴ Department of Physics Education, Universitas Indraprasta PGRI, Jl. Nangka Raya, Jakarta 12530, Indonesia

^* Corresponding author: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 2 July 2026

Abstract

This study aims to perform real-time measurement and analysis of magnetic fields using a data logger. The experimental setup consisted of a data logger, magnetic field sensor, permanent magnet, straight current-carrying conductor, power supply, probe cables, and distance measuring instrument. Magnetic field measurements on a permanent magnet were conducted by varying the distance between the sensor and the magnet from 0.5 cm to 10 cm. The results showed that the magnetic field strength decreased significantly from 31.470 G at 0.5 cm to 0.098 G at 10 cm, indicating that magnetic field intensity weakens with increasing distance from the magnetic source. Measurements were also performed on a straight current-carrying conductor carrying approximately 5 A. The magnetic field strength decreased from 0.317 G at 0.5 cm to −0.073 G at 2.5 cm, reflecting variations in both magnetic field magnitude and direction around the conductor. The data logger provided stable real-time acquisition, automatic data recording, and graphical visualization of magnetic field variations throughout the experiments. These findings demonstrate that a data logger can be effectively utilized for real-time measurement and analysis of magnetic fields, supporting reliable magnetic field characterization in applied physics experiments.