Pinpointer

A pinpointer is a handheld metal detector used to locate a detected target with high precision after a general search has indicated metal in a specific area. It complements a main metal detector by narrowing the target’s location, enabling faster and more accurate digging and reducing the chance of losing the object.

Design and features vary by model, but most pinpointers are palm-sized devices with a sensing element near the tip. They are typically powered by replaceable batteries (such as AA or AAA) or built-in rechargeable cells and include a simple control interface (one or two buttons). Outputs commonly include audible signals, LED indicators, and sometimes vibration to alert the user when the tip is over metal. Many models are water-resistant or fully waterproof to allow use in damp soil or shallow water. The most sensitive detection zone is usually at or near the tip to focus the search and minimize false signals from distant metal.

Operation generally involves turning the device on, then sweeping the tip over the ground in the suspected target area while listening for or feeling a change in signal. When a target is detected, the user narrows the search to the area around the tip and, if necessary, inserts the pinpointer into the hole to pinpoint the precise location before digging. Some users calibrate or adjust sensitivity for different ground conditions or target sizes.

Advantages of pinpointers include faster localization of targets, reduced dig time, and less disruption to surrounding soil. Limitations include sensitivity to surrounding metal, potential false signals from nails or debris, and a finite detection depth. Pinpointers are commonly used by hobbyists and professionals as a practical aid in treasure hunting and archaeology. See also metal detector.