Most common use of Hand Held Detector Machines is for security purpose. It is used at the entrance of any premises to detect hidden metal in any objects. It is used to scan human body for detecting exact location of hidden metal objects (weapon, etc.) and once the object is detected, the system alerts with alarm and further action is taken. Hand Metal Detectors are also used in Medical Industry, as a possible replacement of X-ray machines. In case of medical surgery, if a metal piece is placed inside a human body, then a Hand Held Detector Machine can easily detect its exact location without going under X-Ray radiations. Hand Held detectors are compact, light-weight and portable which makes it preferred over X-ray in some areas. Due to its unique characteristics, Hand Held Metal Detectors are preferred to be used in Food Processing Industry. Now, as most of the industry has gone in automation mode, it has become evident that some checks at manual level are made. Here, the Hand Held Metal Detectors are used to detect the fragments of metals inside the food packaging, so as to avoid any contamination. They are used for geological research to help researchers find metallic composition of soil. Apart from that, Hand Held Detector Machines are also used for archaeological exploration to find the metallic items which have historic significance. Sometimes, they are also used as the detecting tool to find the lost items like piece of jewelry, etc.