The device and the types of search magnets. The strength of the magnet retention search
Exploratory magnet ( magnet system ) consists of as many of the individual permanent magnets. At present , a magnet of neodymium (Nd)- iron (Fe)- boron (B) has the strongest magnetic properties. This magnet is called neodymium magnet .
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The retention force ( lift-off ) of modern neodymium magnet from 80 to 800 kg, but the most commonly used search engines when searching for magnets with holding force of 80 to 300 kg. It should be understood that the nominal holding force corresponds to the ” ideal ” conditions , when a force is applied perpendicular to the surface of the object, and the object’s surface is smooth, flat and clean ( free of dirt , sand and corrosion) .
Deviations from “ideal ” conditions will reduce the holding force . What else can reduce the holding force ? The ambient temperature range for normal search neodymium magnet -50 / +50 degrees. Celsius. When the ambient temperature increases there is a loss of magnetic properties and loss of holding force values .
Search for specific tasks , there are different types of search Magnets:
one-way search magnet designed for steep ( vertical ) search , has one hole for the eye bolt in the butt
two-sided magnets are the most suitable search engines for searching and casts from the shore, has an additional hole for the eye bolt on the side ( in this case, it does not matter – what side of the magnet falls to the bottom )
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Searching for sweeping magnet is designed to survey large areas, with two or four holes for the eyebolt , the maximum contact area and holding force .
Two precautions that should not be ignored when dealing with strong magnets search :
1. Normal operation of electronic devices (cell phone , laptop , watches , GPS , or any type of metal detector ) will not be affected if searching magnet will be on them at a distance of not less than 25 – 35 cm.
2 . For storage or transport magnet must be placed in a wooden box.
In some cases, use the search to find the magnet is much more efficient than using an underwater metal detector .
device and the types of search magnets
The device and the types of search magnets. The strength of the magnet retention search Exploratory magnet ( magnet system ) consists of as many of the individual permanent magnets. At present , a magnet of neodymium (Nd)- iron (Fe)- boron (B) has the strongest magnetic properties. This magnet is called neodymium magnet . The […]
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