Handheld metal detectors are designed to detect suspect items that contain metallic components, such as weapons or illicit contraband. Responders use these metal detectors at access control checkpoints to conduct security screening of individuals.
Metal detectors use electromagnetic fields to actively detect the presence of metallic objects. A hand held metal detector wand has two primary components, a transmitter coil that creates the electromagnetic field and a receiver coil that detects electromagnetism. An electromagnetic field is generated around the transmitter coil which extends to around 20cm from the security wand. When the wand is passed over a subjects body, if a metal object falls into the generated electromagnetic field a further electromagnetic field is induced around the hidden metal object. This new electromagnetic field is detected by the receiver coil which will trigger an alert for the operator.
created with
