| Metal detectors are interesting pieces of technology. | | | | presence of metal. Aside from the portable metal |
| They have a variety of uses and have become even | | | | detectors that we have grown accustomed to and |
| more versatile throughout the years. Ever since the | | | | use in hobbies and games like treasure hunting, there |
| first metal detectors came out in the 19th century, | | | | are some bigger models that are used mainly in |
| scientists and engineers never stopped working on | | | | security and related fields. |
| better and more efficient designs. | | | | Other uses for metal detectors include detection of |
| Nowadays, there are metal detectors that can pinpoint | | | | foreign objects in food. These pieces of equipment are |
| metals so accurately that they have become | | | | of course very useful in the construction industry as |
| indispensable tools in fields like mineralogy, engineering, | | | | well. You could easily detect steel reinforcing bars, |
| security and even in the military. | | | | pipes and wires that are buried in walls and floors with |
| From the crude models of the 19th century, the | | | | a detector. |
| modern detectors had its debut in the 1930s when | | | | Powerful metal detectors are also used to determine |
| Gerhard Fischer released and patented his very own | | | | the location of mineral ores for the mining industry. In |
| metal detector. Fischer's design used resonating coils | | | | the field of archaeology, artifacts can be detected |
| to detect the presence of metal under the ground. | | | | even if they are buried deep underneath sand or soil. |
| These metal detectors proved to be an asset during | | | | During rescue missions, sometimes metal detectors |
| World War II. | | | | also come in handy. |
| Metal detectors were used during the war to find land | | | | In places like airports, security uses walk in metal |
| mines scattered across the paths of troops. They | | | | detectors to determine if people are carrying metallic |
| saved a number of soldiers back then. However, | | | | objects like knives and guns which can cause potential |
| these metal detectors could have been more useful if | | | | dangers to passengers or commuters. |
| they were not that heavy. | | | | The standard coil detectors were the trend back then, |
| Early designs of metal detectors were not that | | | | but recent technologies have brought about new |
| convenient as compared today. These detectors | | | | breeds of metal detectors. You can now see the Beat |
| require a great amount of "juice" to power up which | | | | Balance and Coil Coupled Operation metal detectors |
| means lugging behind heavy batteries. | | | | which were made available to the public just a couple |
| The modern detectors basically are made up of coils | | | | of years ago. |
| and uses electromagnetic induction to detect the | | | | |