An underground power line detector is a specialized electronic device used to find, trace, and pinpoint the location of buried electrical cables and other metallic utilities. It's an absolutely essential tool for damage prevention and worker safety before any excavation or digging begins. Without it, crews risk striking a live power line, which can lead to severe injury, costly equipment damage, and widespread power outages. In many regions, using a locator is a legal requirement before any ground is broken to avoid costly utility strikes.