While it all depends on the type of metal detector, ground conditions, and some other factors, there is a good rule of thumb for determining the depth of the metal detector.
A standard metal detector under ideal conditions detects an object the size of a small coin at the same depth, which is approximately equal to the diameter of the search coil. That is, a metal detector with a 15 cm coil (a 6-inch sniper) will detect coins about the same 15 cm underground.
One of the most important factors that determines the depth of detection of an object is the size of the object. A small coin or a nail from the sole of the shoe may not give any signal at all at great depths. But a sewer pipe, cable, bucket or canned food can from the same depth will signal so that just hold on.
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And in addition, the truism: using a larger coil usually provides more depth, many brands such as Minelab, Quest sometimes even include an additional large coil in the kit with the metal detector. Also, large rudder reels can be bought separately, their line today is wide enough for devices of different models. At the same time, keep in mind that a large search coil can turn the search into an endless nightmare on littered with iron and other meth. garbage soil. Here it is better to give preference to a small sniper reel.
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At this point, we could also talk about the variety of soils and their electrical conductivity, the operating frequencies of metal detectors, the settings parameters, and so on. But these are also truisms, which seem to have long been known to every beginner. It is better to dig in soils with low mineralization, choose medium frequencies for searching, from 7 to 18 kHz, or multi-frequency, do not raise the sensitivity so that there are no false signals, select settings for each case (or surrender to the will of auto-settings). That's when there will be a fairly good depth, for the most part even exceeding the diameter of the search coil of the metal detector.
