seriousdetecting.comAnswer
Jan 14, 2026 - 06:43 PM
No, the Garrett ACE 300 (Open Box) does not use sonar or ground-penetrating radar. It operates using VLF (Very Low Frequency) electromagnetic technology, which is the standard detection method for most hobby metal detectors.
VLF technology works by transmitting an electromagnetic field into the ground. When this field encounters a metal object, it creates a secondary magnetic field that the detector receives and analyzes. This is different from sonar (which uses sound waves) or GPR (which uses radar waves).
The ACE 300 is an excellent entry-level detector with features like Digital Target ID, 8 sensitivity adjustments, and frequency of 8 kHz. Browse our full selection of metal detectors to find the right model for your needs.
