Svarog Rubezh
Metal detector for detecting deep-seated targets from five centimeters in size over large areas and up to ten meters deep. Most often, the device is used in the search for treasures, gold nuggets, meteorites, sunken objects at a frequency of 750 Hz.
The model is based on PI technology, in which a single 40 x 60 cm coil works to receive and transmit radio signals and uses the principle of excitation of pulsed eddy currents at the location of the object, which helps to measure the accuracy of the target characteristics. Moreover, both a coil and a frame measuring 200 x 200 cm are connected to the device.
The metal detector is powered by a lithium-ion battery, its capacity is not indicated by the manufacturer, but clarifies that one charge is enough for 16 hours of continuous operation at above-zero temperatures. In frost (down to -15 ° C), the device works for a short time. The controls are simple, with automatic soil balancing and a ground change tracking mode.
The detector is equipped with no discriminator, display, built-in programs, but there is sensitivity setting, tone identification (one tone) and a 6.35 mm headphone jack.
Detech SSP-5100
Metal detector with improved discrimination and 100 Hz operating frequency. The depth of detection depends on the size of the object and the ground, for example, the device finds large objects at a distance of up to four meters underground.
The device is based on PI technology, which gives greater sensitivity and accurate target measurement, and it is also easy to tune from the ground in manual or automatic modes. The search is carried out on one program "All metals", it has two target identifiers: a graphic diagram to recognize the type of metal detected and a magnetoinduction sensor to discriminate ferrous metals in the upper arable layer (up to 25 cm).
Of the options, there is no tuning from electronic interference and an indicator of the level of soil mineralization. The metal detector is powered by a 1,700 mAh lithium-ion battery, which lasts for a maximum of 15 hours of search (it charges within 10 hours).
Fisher Gemini 3
A professional metal detector made using RF technology, which uses two coils located in perpendicular planes for searching. This technology is used only in highly specialized devices designed to detect large metal objects at a depth of up to six meters.
The device works on the principle of reflecting signals from metal objects at a frequency of 81.92 kHz. On the control panel there is a discrete sensitivity switch (ten positions), a pointer indicator that displays the level of the received signal in decibels, and a power button. The device works in three modes: "Narrow search", "Wide scan" and "Trace".
The metal detector is powered by 16 salt batteries, which are enough for 45 hours of continuous use. There is a 6.3 mm headphone jack, and the headphones themselves need to be purchased separately. Users note that the device accurately detects targets, is easy to use, only bulky.
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