Metal detectors use the technology of electromagnetism and can be used for various purposes. The most common one people are aware of is perhaps its use for security checks of weapons or other metal objects. Another common purpose of using a metal detector is to find a buried object. The buried object usually needs to be within a foot of the surface for the metal detector to be able to find it. Detection of buried treasure using metal detector has also become a hobby and there are social clubs for this activity.
Some of the activities done as a hobby with metal detectors are Coin shooting (coin search), Prospecting (valuable metal search), Relic Hunting (historical item search), and Treasure Hunting (searching gold nuggets). Another important application of metal detectors is in the production facilities. For example, a food processing industrial unit might use a metal detector to remove any metal present from their products. There are commercial metal detectors for this purpose. Metal detectors can also be used for household purposes such as to find metal objects in the patio, lawn or garden.
The metal detector's ability to find the buried object can depend on several things. Firstly, it depends on the technology used in a metal detector. Secondly, it depends on the type and the size of the object buried. It can also depend on the quality of the soil in which the object is buried. Some minerals in the soil are natural conductors and can interfere with the detector's ability. The interference can also come from other objects in the ground such as pipes, cables and power lines.
The kind of metal detector you need depends on your circumstances. Following are information regarding the metal detectors used more commonly today:
Very Low Frequency (VLF): This kind of metal detector is for “mineral-free-all-metal" mode of operation. The VLF type metal detectors perform well in grounds that contain minerals.
Transmitter-receive (TR): this kind of detector is for “non-motion discriminates mode of operation.” The TR detectors are usually used in non-mineralized salt water beaches because this kind of metal detector is not interfered by conductive salts.
RF-Two Box: These kind of metal detectors are mainly used to detect large objects. This metal detector is not ideal to search small objects such as coin. This metal detector is commonly used in industrial applications.
Pulse Induction: This can work in grounds 1 with minerals as well as in grounds with conductive salts. It is also suitable for use in areas with extreme hot rocks. However, this kind of detector operates less efficiently in hard and dry ground.
Before you place an order to buy a metal detector, it will be wise to conduct research on the type of metal detector you need. Once you have decided the kind of metal detector you want to buy, you should check the price offered by different brands, warranty, and the customer reviews. You can also get reviews from your acquaintances that have used the product. lf it is for your hobby then you can connect with the community clubs or social clubs of metal detecting hobby for information regarding that product.