Like other metal detectors, hand held metal detector also serves a specific purpose. The prime objective remains safeguarding security sensitive areas. Its use is a common sight in public buildings and at major events. Find best detector through best metal detector reviews
Hand held metal detectors are battery operated devices that look like a wand and help to do body search for things like offensive weapons, package checking for metal objects. In case of presence of metal, it can alert the operator with an audible beep or a light.
Hand held metal detectors are quite economical as compared to other devices such as a walk through detectors, though both serve the same purpose. These devices can also be rented for short durations to meet your security needs.
These battery operated devices are also very easy to operate and complement other security devices when used in conjunction with them.
There are various models available and with advancement in technology you can also find improved features such as light weight, small size design, in-built flash light, and others. These can detect both ferrous and non ferrous metals.
However, using hand held metal detector could prove to be quite a strenuous task for the security personnel. They have to be constantly on their feet, bending up and down. It also slows down the process of security screening as against the walk through metal detector.
There are three different types of technologies used in hand held metal detector.
The Beat Frequency Oscillation (BFO) in which the detector when moves over a metal creates a magnetic field which causes interference with the frequency of the radio waves and as a result tone change by the receiver is experienced. This technology is the easiest and cheapest to use. However, it fails to distinguish between metals types.
The Pulse Induction (PI) on the other hand is effective in places like salt water, where other detectors face a problem, it can also help to detect much deeper. However, it is not good at differentiating between metals. But then there is the Very Low Frequency (VLF) technology which is very effective in distinguishing between metal types. As the name implies, it receives frequency that bounces back from the metal and is detected by the transmitter.
The choice of a metal detector should be made keeping in mind the purpose of its use. Where one type of detector is found suitable, other types may fail to deliver. Each device is distinct and so is the hand held metal detector.