Detector prices vary by type, features and brand values. There is a wide range of detectors for specific purposes.
The major categories are Treasure, Gold, Security, Industrial, Technical, Military and Ballistic. These major categories have also their sub-categories.
These can be listed as follows:
Treasure : Mineral, Coin, Imaging
Gold : nugget
Single Coin : Metallic coins, gold, silver and bronze coins
Security : Gate Detectors, Body Scanners, X-Ray Imaging Systems, Vehicle underbody imaging systems.
Industrial : Detectors used in food, textile, and plastics industries.
Technical : Detectors used for construction, road building, as well as finding water leaks, cable-pipe, and manholes
Military-Ballistic : Mine and bomb detectors, forensic detectors, detectors used to find bullets and manholes
In a nutshell, the range of detectors cover easy to use hobby units sold for about $250, as well as industrial detectors with a cost of about $30,000.
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