Diving into the world of underwater search with a metal detector opens up new horizons for treasure hunters. From coastlines to deep-sea diving, underwater metal detectors are becoming indispensable tools for those seeking to uncover the mysteries hidden beneath the water. In this article, we will take a closer look at the features of underwater metal detectors, their classification, key characteristics.
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What is an underwater metal detector: features and principle of operation
An underwater metal detector is a specialized device designed to detect metal objects underwater. Its design ensures tightness and pressure resistance, which allows you to work efficiently at different depths. The principle of operation of such devices is based on the creation of an electromagnetic field that interacts with metal objects, causing a return signal recorded by the detector. This allows you to detect objects hidden in sand, silt or under a layer of algae.
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Fisher CZ-21 Underwater Metal detector
An important feature of underwater metal detectors is their ability to work in conditions of increased mineralization, for example, in salt water. To do this, many models are equipped with a salt compensation function that minimizes false alarms and improves search accuracy. In addition, such devices often have special modes for working on the beach or coastal area, where the search conditions may differ significantly from those underwater.
Types of underwater metal detectors: diving into the classification
Underwater metal detectors can be divided into two main categories: amphibious metal detectors and specialized underwater metal detectors.
Amphibious metal detectors are versatile devices that can be used both on land and underwater. They usually have a waterproof design and are capable of diving to a depth of 3 meters. Such models are ideal for searching on the beach, in coastal areas and in shallow waters. An example is the Garrett AT series metal detectors, known for their reliability and versatility.
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Metal Detector for diving and underwater use
Specialized underwater metal detectors are devices designed exclusively for use underwater. They are capable of working at considerable depths (up to 60 meters) and are often used by professional divers and treasure hunters. Such models have a sealed design and special settings for operation in conditions of high mineralization. An example is the Minelab Excalibur II, which is characterized by high sensitivity and detection accuracy.
Use of natural and artificial landmarks on the bottom surface . What could it be ? Stones, elevations and depressions on the bottom, own signal mark of bright material. Swim in and scan the ground along the imaginary lines .
With careful to mark the underwater search of the bottom surface of the test sites . To do so would be the best white rope , which can be clearly seen . If necessary, use a compass and GPS navigation . The scanned area on the site should have little overlap .
The combination of maximum sensitivity and minimum level of discrimination will provide the greatest depth of detection for gold. The best setting for a particular model of underwater metal detector is tested.
To test the underwater metal detector must be buried in the ground soil several objects made of different metals , different shapes and sizes.
Test the device by varying the depth of the objects. As a result of tests, you can set the unit on Wednesday, searching, metal type and depth of the target.
