There are literally hundreds of different types of metal detectors from many brands and manufacturers. Some are even waterproof and come with a built-in battery backup in the event the unit is left on the top of a lake or deep within the ocean for long periods. The main reason for this type of feature is that it allows you to take your portable metal detector wherever you want to go. In addition, some of these units offer extra features such as touch screens that allow the user to easily change what they are searching for while still keeping the device attached to them. If you are interested in purchasing one of these units, you will want to read on to learn about the pros and cons of each model.
The three most popular types of metal detectors are cordless, coil, and iron discrimination. Each one of these offers unique pros and cons when it comes to gold prospecting. For example, the coil detectors are corded which allows them to remain attached to a person while they are actively searching. This is great for families who want to take their precious belongings wherever they go without worrying about dropping their heavy equipment.
The last type we will discuss is the high frequency of electronic prospecting detectors. These high frequency detectors offer the best combination of overall performance and portability. The advantage to the old technology is that it offers more accurate results compared to other types of gold detectors. The main negative to this type of detector is that it does require an electrical outlet in order to work.
The most common type of metal detectors is the mineral. Minelab metal detectors were the first type of metal detector used by professional gold prospectors. They are easy to use and require little maintenance. Many people choose minelab units because they do not have an external battery backup like most other models. The major disadvantage of using mineral units is the relatively poor range of motion that they achieve. Minelab units also tend to give off a strong humming sound which is unpleasant to some people.
Pulse Oximeter Detectors and Vacuum Metal Detector Systems are two of the most advanced types of metal detectors today. These types of detectors detect extremely small amounts of metals by using a pulsating light to excite the metal atoms in the detector. The main advantage to this type of detector is that it can locate very small amounts of metals.
Another important aspect of detecting precious metals is determining the target concentration of minerals. Mineral sampling techniques are used to determine the target concentration of valuable metals. Micro-electrode studies are one such technique which is used to determine the target concentration of gold, silver, copper, and lead. Another popular technique is the use of bulk gamma rays to determine the target concentration of ferricyanide and ferrous iron. Bulk gamma rays are used to investigate rare earth elements like rhodium, selenium, yttrium, and osmium.