A third style, the Printed Spiral, is made only by Tesoro for use with pulse induction circuitry. It offers good sensitivity to a broader range of target sizes and improved sensitivity to less conductive targets such as fine gold chains. All searchcoils are electrostatically shielded and waterproof. There are certain features needed for certain places the device is going to be used for. If you intend to use it on the beach, the terrain wont be that rigorous. But you are going to need waterproof protection.
Hand-held Metal Detectors are designed to safeguard security-sensitive areas like schools, courtrooms, corrections facilities, sports events, businesses, nightclubs, bars and other public areas and events. They are used along with walk-through metal detectors.
Metal detectors work on the principal of electromagnetism and their effects on conductive metals. The high-powered coil of metal, called the transmitter, uses the battery power to generate a penetrating magnetic field. As the electromagnetic field enters the ground, anything metallic will become charged with magnetism.
Metal detecting for beginners
Metal detecting activity is full of...