In general, larger searchcoils will give better depth with larger targets and better ground coverage. However, sensitivity to smaller objects may be sacrificed. Smaller searchcoils will offer greater sensitivity to smaller objects and improved target separation in trashy soil. 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.
A recent study proves that hand-held metal detectors are just as accurate as x-rays in finding coins and other metallic objects swallowed by children. They are cheaper and radiation-free, are usually lightweight, highly sensitive and require little maintenance. The special shape of the sensitive surface makes operation of the device easy, unlike portable metal detectors with ring transducers.
In 1881, Alexander Graham Bell constructed one of the worlds first metal detectors in an attempt to find an assassin’s bullet in President James Garfield. Fischer patented a portable version in 1931.
The Secret to Cleaning Your Metal Detecting Finds
Metal detecting is...
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