Metal detectors are a little bit different, and to know what yours can do best, you should always read the book that comes with your metal detector. By doing that you can rest assure that you are using it the right away. One question people ask all the time about metal detectors is, “can one metal detector really do it all?” the answer is yes and no. Most of the metal detectors that are out there can pick up on almost any metal in the ground. However, there are some metals that are harder to detect, things like gold. That being said, if you are looking for gold you are going to want a more sensitive metal detector. Of course, if you are just looking for coins, a sensitive metal detector could get on your bad side really fast, because it would pick up on all the small pieces of metal like the pull tab to a soda pop can.Metal detectors are good to detect metal only within the detection depth power offered by the type of metal detector, type of metal in the buried object, size of buried object, type of metals in the ground, and other objects in the ground. There are five major types of hobbyist activities involving metal detectors:. Coin shooting is looking for coins after an event involving many people. Prospecting is looking for valuable metal like gold and silver. Relic hunting when the relic hunter is after any type of historical artifact. Treasure hunting is looking for valuable items in general. Beach combing is hunting for lost coins or jewellery lost on a beach.Metal detectors are fun to use, great exercise, and pays off in finds of money, rings, jewelry, gold, relics, artifacts and, in many cases, real treasures. And thus, metal detectors for less was born – from friends who genuinely love our hobby. Since we’re serious about our business we buy metal detecting equipment in large quantities – not only metal detectors, but accessories, books and dvd’s too. This allows us to save money and pass those savings on to our customers; you. All we worry about is warehouse spaces in four complexes that stay stocked all the time. Any orders you place with us we are able to get out as soon as possible, from the warehouse that’s closest to you. There is no reason to pay suggested retail price, or even “sale” prices that are higher than necessary. No high prices are allowed here, and we mean it. Great service by a knowledgeable staff is mandatory.Metal detectors are battery powered, active instruments that radiate a low frequency ac signal into the ground via a transmitting coil. The larger the coil the deeper the penetration of the signal. Any metal object in the signal path will cause an induced current to re-radiate a weaker signal back to the surface and being non-aligned to the initial frequency is easily read by the receiving coil. Small metal objects, such as coins, can only be detected to a depth of a few inches. Large objects, such as a steel helmet, could perhaps be detected up to a few metres but no more than four metres. Power lines, high-density-metal surface objects, iron-rich rock, and metallic litter can all cause noise for metal detectors. Many archaeological sites are unidentified, complex, or too important to just roll in with a digging team and begin to blindly excavate. Some sites will be excavated for many digging seasons and geophysical methods can assist the archaeologist to prioritise the field attack based on the results of a thorough geophysical survey.