Airport Walk Through metal detector to check for weapons

The airport walk through metal detector is a security device used to check for weapons and other prohibited items. The walk through metal detector scans the body using a combination of electromagnetic induction and eddy current to detect objects concealed under clothing. The walk through metal detector measures the amount of resistance in the human body, which increases when metallic objects are worn close to the skin or hidden inside body cavities.

The walk through metal detector consists of two pairs of parallel antennae mounted on either side of a passageway; one pair facing toward the traveler and one facing away from him. The antennas are connected to an electronic control unit (ECU) that processes signals from both sets of antennas and provides an output indicating whether or not contraband is present on the person being scanned.

In order for this device to work effectively, travelers should be aware that they will be asked by security personnel to remove all metallic objects from their pockets before walking through it. Any objects that cannot be removed should be placed in a bin before proceeding through the machine so as not to interfere with its operation or cause injury to themselves or others around them if found later during secondary inspection."