Minelab Excalibur 2 underwater metal detector
Created for the search of lost jewelry, coins, underwater stores, etc. Immersion up to 60 m, 17-Frequency Technology BBS (1.5-25.5 khz). Low frequencies well detect large targets at deep depths and high-value metals of a small size that are not detected by conventional detectors. The instrument is more sustainable in mineralized soil/saline water and allows for more accurate discrimination.
Fitted with waterproof headphones
Adjustments: discrimination, sensitivity, volume, threshold
Modes: discrimination, Target
Metal detectors use an electromagnetic detection principle with the frequency most appropriate for the successful detection of items. The frequency determines the depth of detection and the minimum size of the subject that can find metal.
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High frequencies, such as 72 khz, identify small objects well, but unfortunately cannot penetrate deep into the soil quickly decaying the surface. A low-frequency signal, such as 5 khz, will penetrate deep into the soil, but small objects are not available to it. In addition, with the use of metal detectors in different field conditions, it was observed that one particular frequency only yields a good result when looking at a specific site. As a result of changes in the level of mineralization of the soil, the Pollution and humidity the sensitivity and depth of detection of the same-frequency metal detectors is reduced.
The Minelab company first offered a metal detector that allows the manual selection of the required frequency to detect both small and deep targets-high 32 khz and low 6.4 khz. The further development of this direction has led to the creation of multifrequency metal detectors using a large range of frequencies.
Not only do they successfully ignore mineralization, but they also have the ability to detect both small and large objects equally well, despite the composition of the soil. Today, the most advanced multifrequency detection technology-FBS (full band Spectrum, Full spectrum) has been applied in Explorer SE and Quattro. The technology FBS metal detector conducts a search of more than one frequency, and at the same time 28 frequencies from 1.5 to 100 khz, which allows for the successful retrieval of different targets previously inaccessible by the single-frequency.
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