Electromagnetic locators are devices used to detect and locate underground utilities, such as water, gas, and electrical lines. They work by sending an electromagnetic signal through the ground, which interacts with the buried objects. The device then receives the reflected signals, allowing operators to pinpoint the location of the utilities. These locators are essential for construction and excavation projects, helping to prevent accidental damage to underground infrastructure. They are often used by professionals in fields like construction, plumbing, and utility maintenance to ensure safety and efficiency during digging or drilling activities.