| When it comes to metal detectors, what you are | | | | from surgeries without out the invasive procedure |
| most likely to imagine are the walk-through | | | | of a detailed search. |
| detectors in public buildings and airports. These are | | | | Apart from means of security, other applications |
| used on a larger scale for security purposes. | | | | can utilize these scanners as well. Construction |
| Occasionally, you may walk through and cause | | | | crews use them to pinpoint where nails and |
| the scanner to beep simultaneously, indicating that | | | | screws are to reclaim building materials. If a child |
| metal is on your body. At this point, security | | | | is suspected to have swallowed a harmful metal |
| personnel may guide you to the side of the | | | | object, a quick sweep of the hand held scanner |
| security line and scan you with a hand held | | | | over their midsection will reveal where the object |
| scanner to get a better clue as to why you set | | | | is without radiation exposure, like when x-rays are |
| off the alarm. While this is an obvious and | | | | used. |
| well-known application of these types of | | | | Hand held scanners are small devices with several |
| detectors, there are many other purposes for | | | | important components. The control box, speaker |
| this device that can apply to the general public. | | | | and microprocessor connect to a shaft with a |
| A schoolroom is a common location for metal | | | | search coil. Batteries in the device allow it to be |
| detectors. As the risk of student violence | | | | portable, which is essential in most applications. |
| increases, the need for tighter security increases. | | | | When the coil moves over a metal object, the |
| Courtrooms and correctional facilities also fit into | | | | device's alarm is set off, working by the principle |
| an appropriate category where hand held | | | | of pulse induction. Conductive metals bring a |
| scanners may be used. Public sporting events, | | | | longer pulse time in the device than |
| concerts, parades or other temporary events | | | | non-conductive objects, allowing the metal's |
| where large congregations of people gather | | | | location to be revealed. Hand held scanners require |
| makes for a useful application of a hand held | | | | very little maintenance and act as an excellent |
| metal detector where a large walk-through | | | | alternative to extensive searching. They can be |
| detector would not be practical. In these | | | | used after only a brief training session and act as |
| situations, scanning a person with a hand held | | | | accurate metal-detecting device for multiple |
| device can detect the presence of metal implants | | | | purposes. |