What type of sensor is used to detect metal objects like coins and pocketknives?

Magnetic Point Sensors (MPS) are specifically designed to detect metal objects by measuring the magnetic fields that these objects generate. This technology exploits the fact that metals like coins and pocketknives alter the local magnetic field when they are nearby, allowing the sensor to identify their presence effectively. Due to their sensitivity and ability to focus on specific metal types, MPS is particularly useful in applications such as security screenings and border patrol operations, where identifying hidden metallic items is crucial.

In contrast, the other types of sensors serve distinct purposes. For instance, Buckeye Orion Camera Sensors are primarily used for surveillance and visual monitoring rather than detecting metal. Seismic Point Sensors (SPS) specialize in detecting vibrations in the ground, which makes them useful for sensing movement rather than metal detection. Similarly, Magnetic Vehicle Detection Sensors (MVDS) are optimized for detecting larger metal objects, specifically vehicles, and are not suited for the detection of smaller personal items like coins or pocketknives. This distinction highlights the specialized nature of MPS in accurately identifying smaller metal objects.