Extremely Low Frequency (ELF) is a spectrum of electromagnetic waves with a frequency of 0-300Hz. Research Radiation from the ELF magnetic field has a positive impact on foodstuffs because it is non-ionizing. Tomato is a fruit with high nutritional content, but has a short shelf life of ± 7-8 days at temperatures above C. An alternative way to extend the shelf life of tomatoes is by exposure to ELF magnetic field radiation. The purpose of this study was to analyze the presence or absence of the effect of ELF on tomatoes. The sample used was apple tomato (Lycopersicum Pyriporme). The type of research used is a laboratory experiment research and a completely randomized design research. A total of 180 samples were divided into a control group (30 samples) and an experimental group (150 samples) with the ELF magnetic field treatment with an intensity of 600 T and 1000 T for 30, 60 and 90 minutes. The research was carried out for 20 days. Data processing and data analysis was carried out by using the Kruskal Wallis test using the IBM Statistical SPSS 23 software. The conclusion of the results obtained was that the effect of exposure to the ELF magnetic field on the sample was marked by changes in pH values due to disturbed activity of pathogenic microorganisms in tomatoes. This is evidenced by the graph of the results of changes in pH for each measurement of the control group, the changes are very sharp compared to the experimental group which tends to change with a slight difference.