How and what to make a search magnet from

What is a search magnet and what is it for?

Magnetism has long been studied by man; this useful quality of magnets has found wide application in various fields of activity. However, only due to the rapid pace of technological progress, magnets have recently become available to the general public.

Thus, innovative developments have given rise to a new form of the alloy - a neodymium magnet or search magnet, which has almost completely replaced the usual ferrimagnetic material.

A new type of magnets is widespread and successfully used in everyday life, in the electrical field, and in medicine.

A search magnet is most often a round object with a steel body, inside of which a neodymium core of one or another power is hidden; it is worth noting that the price of a search magnet will depend on this. On one of the planes of the body there is a strong ring-shaped mount called an eyebolt. Fastening is also necessary to separate a powerful magnet from a metal object it detects; to do this, you need to screw the bolt harder into the structure.

How to use a search magnet?

Many metal detectors, archaeologists, and searchers for historical artifacts dream of buying a search magnet, since it has an undeniable number of positive qualities. Using such a device, you can search for metal objects not only on the ground, be it soil, clay, sand or grass, but also in bodies of water of any depth, from small rivers to deep-sea lakes.

Security measures

You should know that when using a search magnet you need to follow a number of safety precautions:

1. The magnet can be carried exclusively by the earring mount or in a special bag. This way, you will prevent accidental magnetization to metal objects, for example, a car body or an iron garage door. This is not just a warning; it is worth understanding that such a magnet is extremely difficult to detach from flat surfaces of a large area, and therefore the surface can be damaged.
2. Under no circumstances should you keep your fingers in the space between the working magnetic surface and a metal object to prevent injury.
3. Any objects with electromagnetic properties, be it electronic or even quartz watches, telephones, plastic bank cards, should be kept at a distance of at least 30 centimeters.
4. The search magnet can be operated at temperatures up to 80 degrees, so avoid overheating. Otherwise, the magnet will lose its main quality - magnetization to metal.

Source: http://spokoino.ru/articles/other/chto_takoe_poiskovyj_magnit_i_dlya_chego_on_nuzhen/

What metals does a neodymium magnet attract?

Only steels have magnetic properties , and not all of them. For example, austenitic stainless steels do not attract magnets because they do not have ferromagnetic properties.

However, there are a sufficient number of enthusiasts who believe that magnetic waves are emitted by any metal, and therefore there should be a search magnet for gold and silver, and for some this expression is quite normal for perception and practical use.

ATTENTION! MAGNETS FOR SEARCHING GOLD, COPPER, SILVER DO NOT EXIST!

THEY SIMPLY ARE NOT - ANYWHERE!

In our article we describe the theory of how non-ferrous and precious metals can be detected using magnetic fields. This article is our fantasy, supported by scientific developments of foreign scientists.

See also the article - Extraction of scrap metal from water (about ferrous metal and search magnet).

Device for adjusting the magnetic field from metal objects

Strictly speaking, this is not a magnet, but rather an electromagnet, with the help of which you can initiate and configure any magnetic radiation, even quite weak ones, to be captured by appropriate devices. It is not easy to build such a device, but the authors, citizens of Australia, have no doubt about its effectiveness.

That's why they patented their invention in their patent office. Based on the fact that Australian soil is not much different from domestic soil, we will give a description of the device and operating principle of such a magnet for gold and silver.

Although it is necessary to repeat - in the generally accepted sense, this design has nothing .

The operation of the device is based on the well-known physical fact that when any object that generates magnetic oscillations in an alternating electric field moves, changes occur inside the trapper circuit associated with the movement of atoms around the nucleus.

If the area of ​​electric field generation is sequentially moved along or across the magnetic field from a metal object, changes will occur in this area, the intensity of which determines the degree and strength of the interaction of two fields - magnetic and electric.

The difficulty is that strong magnetic fields are not created by noble metals . It is known, for example, that, according to the principle of decreasing, the electrochemical potentials of non-ferrous metals are located as follows (we consider only the area of ​​interest to us): copper → mercury → silver → palladium → platinum → gold.

Thus, if the expression “is copper attracted to a magnet” may still have some basis, then the phrase “magnet for gold” does not make any sense at all.

It is more correct to talk about an electromagnetic trap, which will record the fact of a coordinated change in electric and magnetic fields in a certain, rather local, metallic volume.

— how copper interacts with a magnet:

Recording of changes that occur in the apparatus under the influence of such fields is captured by the measuring circuit. It is a highly sensitive spring made of rhenium, a rare metal that is absolutely insensitive to temperature changes. The rhenium spring must be adjusted to operate.

  The process is to set the conditional zero of the device, for which it is placed as far as possible from all metal objects. In urban areas, such a “search magnet for gold, silver and other precious metals” will not work. However, search engines are much more likely to look for gold, platinum, copper, silver, etc.

in old abandoned rural estates

With any movement of the device, a similar action occurs with the electric field, while the magnetic field remains constant in coordinates. Therefore, the resulting movement of the spring will also be different.

Where it turns out to be most intense, its source is almost certainly located - the magnetic field. Another thing is that this kind of search magnet for non-ferrous metals will not be able to show which metal is hidden under the thickness of wood or earth.

But the device will definitely show that there is metal there.

Any metal can be detected by a magnetic field

The principle of operation of such a pseudo-magnet is similar to the coils of a metal detector, with the only difference being that the “magnet” will be tuned to only 1 metal and this is in theory - but we don’t know how it will behave in practice, BUT, most likely, it’s cheaper, faster and simpler will use an ordinary metal detector to search for non-ferrous metals, since not a single wizard has yet invented a magnet for non-ferrous and precious metals, maybe because there are no wizards!

How to assemble and set up

It will be very difficult to find/buy a rhenium spring, but all other parts of the device are quite accessible for making yourself. The sequence is:

1. A steel axle is made from a thin-walled steel pipe with a diameter of no more than 16 mm. Its length should not be less than three diameters, otherwise the change in the magnetic field cannot be detected.
2. A frame is made from thin copper or brass wire. The authors do not describe its dimensions, but, based on the dimensions of the tubular axis, it should be at least 200x200 mm. The frame must be sufficiently rigid.
3. Three (as many as possible) holes are drilled in the tubular axle at equal distances, in which the wooden axles are placed.
4. Thin-walled wooden disks are made, the number of which must correspond to the number of holes drilled in the axle. Obviously, discs can also be made of plywood: what matters is the mass of the disc and its absolute immunity to magnetic fields.
5. The central sectors of each disk are covered with metal foil made of the metal that will be searched. Thus, a search magnet for non-ferrous metals - copper, gold and silver (platinum is searched for much less frequently) should have three sets of replaceable wooden disks.
6. The frame with disks must be able to move freely along the entire tubular axis with fixation in a certain place. If the fits of the mating parts are made with the required accuracy, then there should be no swaying of the frame when it moves.
7. To create a magnetic trap, plates from an old transformer are used, which are packed into the frame outline. The distance between adjacent plates should not exceed 1.5 mm in thickness and 56 mm in length. Such plates form the screen of the device that perceives magnetic radiation.
8. Next, assemble the magnetic coil. You will need a solenoid made of 600 layers of enameled wire, which is connected to an alternating current voltage source. The winding should be multilayer, this will reduce the parasitic capacitance of the coil and make the device less inertial.
9. A ferromagnetic or - which is better - a ferroelectric core is inserted inside the coil.
10. By connecting this structure through a step-down transformer, a constant position of the frame with the plates is achieved relative to the wooden disks. This will be the conditional zero of the search “magnet” for non-ferrous metals.

The easiest way to check whether a search “magnet” attracts gold and silver is on a real object made of these metals. At the same time, it will be possible to establish the practical sensitivity of the device.

about how a search magnet does NOT magnetize gold, silver and other coins

Source: https://masakarton.com/kakie-metally-prityagivaet-neodimovyy-magnit/

Search magnet, why does a search engine need it and how to choose a search magnet?

You've probably already noticed that a mysterious group of products has appeared in the assortment of stores for search engines. There are very few products in this group and they are all called Search Magnets. Let's figure out together why a search magnet is needed.

Why are search magnets needed?

First of all, a search magnet is designed to search places hidden from conventional search methods. For example, using a search magnet you can search the bottom of a well, pond or small river. It is enough to tie a strong rope or cable to a search magnet and lower it into the magnet at the bottom of a reservoir or well.

If there are objects made of iron, nickel and other magnetic materials at the bottom, then the search magnet will be magnetized to them and they can be easily retrieved without plunging into the water.

But what interesting things could be hidden in a village well or the bottom of a river in the area of ​​the crossing? Very interesting household items, as well as things that they tried to hide more reliably, for example, weapons hidden by deserters, partisans and other individuals with a darker past.

Another area of ​​application for search magnets is clearing the intended search site of iron debris. It is enough to drag a search magnet along the surface of the earth so that it collects from the surface all the nails, pieces of steel wire, steel plugs and other search debris that litter fields, abandoned houses and settlements.

A search magnet can also be used when searching with a metal detector. If the metal detector signal disappears after you have dug a small hole, then a search detector will help you quickly find iron “garbage” in the screening or in the hole. What should you know when choosing a search magnet? The most important characteristic of a search magnet is its magnetic strength.

In order to make the value of the magnetic force more clear to the buyer, it is expressed in kilograms. Search magnets have a magnetic force of 60 to 600 kilograms. The most popular magnets among search enthusiasts are magnets for 200, 300 kilograms; they have a reasonable price and are easy to use. More powerful magnets of 500 kilograms or more are in less demand.

It seems that you can get half a ton from the bottom of the river. But such powerful magnets are needed for more precise fixation to thin metal with curves or to small metal surfaces. For the accuracy of the description, it is worth adding that testing and determining the magnetic strength of the search magnet takes place on a clean milled steel sheet 8-10 mm thick.

Therefore, a search magnet must be purchased with a reserve.

When choosing a search magnet, you need to choose a magnet that has a device for removing the magnet from the piece of metal on which it is magnetized. Otherwise, removing the magnet from the metal will take much longer than the search itself.

Most often, the device for removing a magnet from metal is an eye bolt. An eye bolt performs two roles at once - a convenient place for attaching a rope or cable and a simple device for removing a magnet from metal.

It is enough to screw the eye bolt all the way into the body of the search magnet and it can be easily removed from the found metal.

Search magnets come in single- and double-sided types. Double-sided magnets are more convenient and more efficient, due to the fact that they can be magnetized to the “target” by two sides, rather than one.

Selecting accompanying equipment for working with a search magnet

If you are going to use a search magnet to search at the bottom of reservoirs or wells, as well as to lift finds to the surface, then you will have to additionally purchase a strong rope and a winch for the magnet! Yes, a winch! How are you going to get your magnet out of the bottom of the swamp if it gets caught on a sunken tank? Of course, none of the search magnets will pull out a tank; it’s like dragging a “hippopotamus out of a swamp.” But you also can’t leave the magnet at the bottom because the rope breaks. Therefore, if you purchased a 200 kilogram magnet, then it is advisable to use it with a 250-500 kilogram rope and a similar winch. And of course, don’t forget to take with you a key or a strong wrench for screwing in the eye bolt, otherwise you risk returning home with a magnetized anvil

source

Source: http://sevgps.com/informatsiia/stati/poiskovyi-magnit-zachem-on-nuzhen-poiskoviku-i-kak-zhe-vybrat-poiskovyi-magnit

Search magnets are the treasure hunter's best assistant

Despite the emergence of multifunctional metal detectors, the most accessible and universal means of searching for metal objects remains a magnet.

In everyday life, it is indispensable for finding lost needles, nails or keys, and in nature, search magnets allow you to find real rarities and treasures in sand, soil, crevices and even in reservoirs. Moreover, they can work perfectly in tandem with metal detectors.

If you first examine an area of ​​the ground using a magnet, you can clear the area of ​​metal objects lying on the surface and simplify the task for the operator.

Neodymium magnets are the most powerful

The best results in your search can be achieved with neodymium magnets, which are widely available on sale. They are capable of not only detecting valuable finds, but also holding metal objects weighing several hundred kilograms! This is a fundamental advantage when you need to lift a heavy object to the surface from the bottom of a well, pond or deep ravine.

Magnets can be single-sided or double-sided. Single-sided ones are lighter, they are quite suitable for searching for treasure in the ground or in a small pond, and double-sided ones can attract objects from both sides, which is very convenient when working in crevices or over a large area.

Accordingly, the choice of certain magnets should be determined by the main purpose and conditions of their use.

What does a magnet consist of?

Search magnets usually have a round shape. Models of different diameters are available. They are galvanized and then glued into the housing using epoxy glue, which fills the gap between the housing and the magnet. The set of modern search magnets includes an eye bolt.

Neodymium magnets are made from a unique three-component alloy NdFeB (Nd - neodymium, Fe - iron, B - boron). Due to this combination, they acquire enhanced magnetic properties, surpassing all currently existing magnets. Their tearing force (holding weight) ranges from 40 to 600 kg or more, and this parameter is the most important when choosing neodymium magnets. Naturally, the greater the tearing force, the more powerful, heavier and more expensive the magnet.

The housing is a steel piece that contains a magnet. Thanks to the galvanized coating, the housing is resistant to corrosion and the magnet can be used in fresh and salt water. There are also cheap search magnets without a housing.

An eye bolt is used to attach a magnet to a cable or fishing line, for which a threaded hole is provided. For single-sided magnets it is located directly in the center, and for double-sided magnets it is located on the side of the body. Before using the magnet, the eyebolt is screwed tightly into the hole, after which the cable is attached to it. The rope must be very strong in order to be able to pull out the magnet along with the detected object.

How to choose a search magnet?

As already mentioned, the key characteristic of magnets is the pull-out force, denoted by the letter F. If you plan to use search magnets only in everyday life or to search for objects on the surface of the earth, then neodymium magnets F80-F120 will do this perfectly. With their help, you can pull out a tool that has fallen into the water (for example, scissors), as well as find lost keys.

To detect objects in soil or sand, you will need F170-200 magnets, and to find treasure in water bodies, you will need neodymium magnets with a pullout force of more than 200 kg.

In all of these cases, it is better to choose more powerful magnets, since the indicated maximum magnetization force is relevant only for ideal conditions. Any contamination, corrosion and irregularities somehow reduce this indicator.

The most powerful magnets (up to 500 and above) are rarely used due to their heavy weight and high price. The optimal magnet weight for long-term searches is no more than 1.20-1.40 kg.

What can you find with a search magnet?

Using a search magnet, you can find any metal objects: from ancient coins to weapons from times of war. It all depends on the power of the magnet and the location of the search (land, pond, attic). Among the interesting finds are jewelry and various utensils: metal utensils, spoons, knives, locks.

The most effective searches are in reservoirs and abandoned wells. There is even a whole clan of treasure hunters who prefer to search for rarities in the water. Double-sided neodymium magnets, which are easier to drag along the bottom, are best suited for these purposes. With the help of such products, amateurs can successfully catch coins from city fountains, where tourists generously throw them.

Of course, not every trip to nature pleases even experienced treasure hunters with valuable finds. But if you were unable to find rarities that would be of interest to collectors, then you can hand over the collected scrap metal and receive financial compensation for your time spent.

According to treasure hunters, there are “fruitful” days when you can collect a lot of scrap metal. If the magnet is not very powerful, then you can simply walk along the beach or other vacation spots and find modern coins, keychains and other small items.

Naturally, it is better to use neodymium magnets, since their use significantly increases the likelihood of detecting both ordinary metal objects and interesting finds.

Neodymium magnets are not only the most powerful, but also very durable. If you do not use them at extreme temperatures (over +80 °C), then in ten years they will practically not lose their magnetic properties.

However, it should be noted that working with powerful magnets requires compliance with certain rules. First of all, it is advisable to use gloves and safety glasses. Do not carry the magnet together with bank cards, flash drives and phones to avoid damage or demagnetization.

Small children and people with pacemakers should not use magnets.

Source: http://www.metr.ru/blog/poiskovye_magnity_luchshij_pomoshhnik_kladoiskatelja/2014-02-26-272

How to use a Magnit card

Loyalty programs are an undoubted attribute of today's retail chains. The latter are interested not only in attracting a client, but also in retaining him for the maximum possible period of time using various marketing tools. One of these tools is bonus and discount cards, which allow you to receive discounts and accumulate bonuses with each purchase of a product.

Throughout 2019, the Magnit family of stores was actively involved in implementing a loyalty program in 65 constituent entities of the Russian Federation. The instrument of this program was a system that allows you to accumulate bonuses for purchases. And then use them to purchase new goods in stores of the same name. Below we will discuss how to use your bonus card from the Magnit retail chain.

Conditions for receiving and validity of Magnit card bonuses

The pilot implementation of Magnit loyalty cards was launched in the spring of 2019 in three regions - Kostroma, Yaroslavl and Chelyabinsk. Within a few months, the network issued more than one and a half million such cards, and the project was considered a success.

By the end of 2019, the Magnit loyalty program was extended to 65 constituent entities of the Russian Federation. And the number of cards issued exceeded several million.

More than 60% of goods sold were purchased with it, more than 20% of participants used the virtual card in the mobile application.

Results of the pilot program of the Magnit network

This bonus system of the Magnit retail chain allows you to accumulate bonus points after each purchase made. Each accumulated point is equal to 1 ruble. And with the points accumulated in this way, you can purchase the necessary goods in the family of these stores.

The Magnit family of stores includes thousands of stores throughout Russia

It earns you points in the amount of 0.5% of your purchase. Another 0.5% of the purchase amount is credited in the first thirty days after registration.

Bonus for purchases is 0.5%

You will also be credited with an additional 2.0% of the paid purchase amount if you purchased goods during the period from three days before your birthday to three days after it.

Another 2% can be accrued from the paid purchase of goods belonging to a certain category. They are credited to the bonus account within thirty days, after which they can be used.

Bonuses can also be awarded for participation in promotions and as part of personal offers.

Magnit bonus points are valid for one year from the date of accrual . After this period expires, they burn out.

After a year, bonus points expire

This is useful to know: how to determine whether the Magnit card is activated.

What are “Additional accrual levels”?

In addition to the conditions we have described, you can use additional levels of accruals within the Magnit loyalty program. Such accruals can be received the next month after the month in which you met a number of conditions.

Charges: Conditions:

1%	If you purchase goods in the Magnit network for an amount of 5 thousand rubles or more or purchase more than 50 different goods.
2%	If the amount of your purchases per month is more than 10 thousand rubles, or you purchase more than 100 different goods.

At the same time, goods in the form of toys, Promo figures, tobacco products, and promotional gifts are not included in the additional accrual levels.

Registration and activation of the Magnit card

The design of the Magnit card looks quite simple. You can purchase a card at the checkout of a retail chain store for 1 symbolic ruble, provided that you purchase goods worth 500 rubles or more. You can also simply buy a card at the checkout without any conditions, paying 25 rubles for it.

In addition, you can apply for a virtual Magnit card in the mobile application or on the network website. The retail cost of the card will not be charged.

The Magnit mobile application allows you to create a virtual card

After purchasing the card, you will need to activate it, since only after that you will be able to use the card from Magnit. The easiest way to activate the card is to send a free SMS to number 9002 in the following format:

The number of the card you have (without spaces) - SPACE - your name - SPACE - your date of birth (day - two digits, month - two digits, year of birth - four digits).

Example of an SMS message for Magnit card activation

After sending the message, you will receive a response SMS confirming the activation of the card.

You can also activate in the system in the Magnit mobile application (Android, iOS), in your personal account on the Magnit website, or by calling the toll-free hotline at 8 (800) 200-90-02.

You can activate your card on the website

Only one card can be linked to one mobile phone.

This will also be useful: how to activate a Magnit card using the card number.

How to use the Magnit bonus system

Accordingly, after registering and activating the card for a subsequent purchase in the Magnit retail chain, you can start using it. Just provide the seller with the money for the product you purchased and your bonus card. The receipt received during checkout will contain the points you received, as well as their total amount in your account.

You can also control the number of points you have using a mobile application or in your Personal Account on the website.

Conclusion

Above, we examined in detail what are the features of using a bonus card from the Magnit retail chain. Despite the rather late introduction of the loyalty card compared to its competitors, it has found millions of its active users. However, many clients are not happy with the system. It is quite difficult to activate, the system may calculate points incorrectly, and the support team is often helpless.

Source: https://sdelaicomp.ru/obzori/kak-polzovatsya-kartoj-magnit.html

Single-sided or double-sided search magnet? [contact-form-7 404

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1. Design
2. Description
3. Which magnet should you choose?

In recent years, the use of search magnets has become increasingly popular. Indeed, the range of their applications is quite wide.

Having such a useful thing as a search magnet can add pleasant variety to our hobby. And the choice provided to customers is impressive. In most cases, magnets are used to search in all kinds of bodies of water, although of course there are other possible applications.

What can a magnet do? The fact that they can lift all sorts of interesting things from wells, lakes, rivers and streams is understandable, but magnets differ in their maximum tearing force and how to make the right choice? Here, in general, the advice is simple; if you do not have any specific tasks, then the most optimal would be a magnet with a pull-out gain of 300 to 600 kilograms. But no one will dispute that for some tasks much weaker magnets, for example 120 kilograms, are quite sufficient.

Options for using search magnets

• Searching and lifting metal objects (iron or non-ferrous metal with iron parts) from wells, sinkholes, rivers, lakes and other bodies of water using search magnets.
• Trawling reservoirs with search magnets in search of large iron objects (tanks, cars, ships).
• Cleaning excavated soil with search magnets from small iron in littered areas when searching for small coins.
• Preparing a site for an MD search (cleaning up of iron debris) in dry, loose soil, for example in an attic or under the floor using search magnets.
• Removing iron in heavily littered areas, for example when digging out the foundations of old houses with search magnets.
• Determining the magnetism of stones (possible iron meteorites) using a search magnet.
• Lifting various scrap iron for delivery to CherMet.

Design

A magnet is a metal disk with a magnetic element inserted into it. All one-sided magnets are divided according to their attractive force. From 80 to 700 kilograms. They are great for any type of search.

There is an opinion that a double-sided magnet works better because it has two working surfaces and goes directly along the bottom. There are both disadvantages and advantages to this. When an object is magnetized on one side, it is magnetized to the end, and even with complex bottom topography, the likelihood of it coming off is extremely low.

The double-sided one goes along the bottom and it is easier for it to magnetize the thing, but the likelihood of losing it when pulling it out is much higher than with the one-sided one.

Description

As you know, search magnets come in both single-sided and double-sided. Single-sided magnets are best for "vertical" use. With them it is most convenient to search for objects in the water from a boat, bridge or ice hole. In this case, the magnet descends (enters) into the water almost perpendicular to its surface and thus most effectively magnetizes metal objects located at the bottom to itself (it is located, as it were, above them).

Of course, you can use a one-sided magnet to search from the shore, throwing it into the water. But, with such a “horizontal” use, the search efficiency will be significantly lower, or a sufficiently powerful magnet is needed (600, 800 kg). The hook effect will only be at the point where it is immersed in the water after the throw, and even then only on the condition that it does not capsize. Plus, the find still needs to be able to reach the shore, and water, muddy bottom, algae, stones, garbage, etc. They will do their best to prevent this.

A double-sided search magnet is quite a universal thing. No matter how the magnet turns over when thrown, any of its sides will fall to the bottom and will participate in the search, including during pulling ashore.

A good option is a 200 kg double-sided search magnet (each side). And ideally, to search along the bottom, it is best to use more powerful double-sided magnets - 400 kg or even 600 kg. There will be more interesting finds.

The weight of such magnets ranges from 3 to 6 kg.

When handling search magnets, all safety precautions should be observed:

1. When storing and transporting, the search magnet should be placed in a box made of non-magnetic material (wooden). As a last resort, attach it to the search side with a wooden plate 1-2 cm thick.
2. Small objects (nails, splinters, etc.) can be removed from the surface quite easily. And to tear off a search magnet from massive iron objects, it is usually enough to move the magnet to the edge or tear off the search magnet at an angle to the adhesion plane.

Source: http://mfina.ru/odnostoronnij-ili-dvuxstoronnij-poiskovyj-magnit/

What is a search magnet? Materials of manufacture and design

The properties of magnets have been known to mankind for a long time, but thanks to the development of industry they became widely used only at the end of the 19th century. Along with industrial tasks, ferrimagnetic materials are also used in everyday life. One of the interesting, and most importantly, profitable ways is to search for metal objects. Before you find out what a search magnet is, you need to know its main characteristics and properties.

Manufacturing materials

Most magnets for practical purposes are artificial alloys. Natural materials, in particular magnetic iron ore, do not have the required properties.

They have low tear-out forces and are susceptible to rapid destruction as a result of mechanical stress. Therefore, for industrial purposes, ferrites placed in a magnetic field during the manufacturing process are often used.

Their service life can be counted for decades, without loss of performance properties.

Unlike industrial designs, household magnet designs are simple. Due to their small size, neodymium alloy – N-Fe-B – is often used for their manufacture. To improve mechanical strength and reduce cost, iron and boron are added to the material. The result is a neodymium magnet, the search potential of which is still being revealed.

Their scope is wide:

• Furniture industry – door clamps.
• Security systems – in combination with sensors.
• Calculation of angular velocity or angular position - used in conjunction with a Hall sensor.
• On search and archaeological expeditions.

A rather interesting niche has also been found for private use. In regions with a rich historical past, you can make a search magnet with your own hands and practice practical archaeology.

Security measures

Not many people know that certain rules must be followed when working with magnets. In most cases, large models have qualities that can cause harm to both humans and equipment.

Therefore, the following safety precautions should be followed:

1. Prepare a special container, the material of which does not have magnetic properties. It can be wood or thick-walled polymer. Place a warning sign on the surface.
2. For normal operation of electronic devices, the minimum distance from the magnet should be 10-20 cm.
3. Force fields negatively affect the functioning of the pacemaker.
4. The space between the magnet and the metal must be free. Otherwise, injuries due to pinched limbs may occur.

Options

As the linear dimensions of the magnet increase, its performance indicators increase. Depending on the task at hand, you should carefully choose, since the cost of various models can range from $30 to $300.

Holding weight, kg	Magnet weight, kg	Diameter, mm	Height, mm
300	1,2	96	18
400	1,4	106	18
600	2,2	140	30

But what is a search magnet without the appropriate equipment?

Hull and lift elements

The protective shell is made of durable material. The best option is turning the steel blank followed by galvanizing. Such a product will provide reliable protection against mechanical damage, and thanks to the surface layer it will not be subject to corrosion for a long time.

Methods for attaching a magnet to a housing can be varied. But the most popular and practical are:

1. Manufacturing of a closed structure with a threaded lid. Its tightness makes it possible not to fear the harmful effects of water, even sea water.
2. Fixation with epoxy glue.

You can make a search magnet with your own hands in other ways. The main thing is to follow safety precautions and take care of the reliability of the entire structure.

For lifting, a strong cord is usually used, the breaking force of which should be at least three times the holding weight.

Practical use

But what is a search magnet without interesting finds? Due to its specific properties, it can be used where conventional metal detectors fail - in an aquatic environment. With proper skill, you can thoroughly explore a large area of ​​the river bottom in a day. Considering the vast historical past of almost every region of the country, there is sure to be a unique specimen from past centuries.

But you shouldn’t console yourself with the thought of getting rich soon - the finds found with a search magnet are varied and are not always of value. You literally have to shovel the mouth of the river to find anything worthy of attention. Therefore, before starting a mini-expedition, it is recommended to familiarize yourself with the history of the region in order to increase the likelihood of a successful “catch”.

Source: https://FB.ru/article/143144/chto-takoe-poiskovyiy-magnit-materialyi-izgotovleniya-i-konstruktsiya

Search Magnet | Treasure hunting from A to Z

» Devices for cops » Search magnet

November 04, 2015 at 10:00

Search magnet

The fields are still being plowed, so there is no need to talk about a full-fledged search with a metal detector. Of course, you can walk around in the forest, but this is not exactly what the treasure hunter wants. After all, if you look at it, even searching in the forest, where there is not much grass, does not always promise to find at least something. The thing is that a lot depends on the proximity of populated areas, old villages and other objects that are interesting from the point of view of a search engine.

Moreover, the finds will be found in the immediate vicinity of populated areas, and already at a distance from the village, for example, 1-2 kilometers deep into the forest, the device may be silent, and sometimes you even get the feeling that it is broken, you have to double-check its functionality with a shovel, holding it over the coil. Just for fun, try to climb into the thicket of the forest, about 5 kilometers from the village, and look there. I think the result will not be very good.

Checking the functionality of the metal detector with a shovel

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Where can you use a search magnet?

a search magnet for a while . In fact, from the name it is already clear what the point is - to look for metal objects that tend to be magnetized using a neodymium magnet for searching.

Search magnets are used in bodies of water

Moreover, the search itself, in 99% of cases, is carried out in the aquatic environment: rivers, lakes, ponds, wells. It may seem to some that this type of search is not particularly interesting, since what could be interesting in ordinary pieces of hardware?

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What can you find with a search magnet?

But it turns out that there are quite a lot of interesting objects made from ordinary metal that are pleasing to the eye. You will be surprised when, after throwing a magnet into an old village pond, horseshoes, gardening tools, some kitchen utensils, and a host of other items will be pulled ashore.

You can lift a horseshoe from a village pond

If you throw such a magnet on rivers, you can add to your collection of fishing tackle. Knives, nails, axes, and other tools are often found. Of course, there is plenty of garbage too. But the activity is so exciting that it completely addicts you. We considered searching using a magnet as a hobby.

On the rivers you can collect a collection of fishing gear

On the other hand, it is by working with a search magnet that you can earn extra money. Everything is simple here: there is so much scrap metal in some rivers that the question arises of how to remove it and how to transport it. You can’t earn millions, but a few thousand rubles with a serious approach is quite possible. Plus, you will make the river section itself cleaner, so to speak, with one more good deed in your piggy bank.

Or you can just collect scrap metal

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Several characteristics of a search magnet

If we turn to the market of search magnets, we will notice that today there are several types of magnets that differ from each other in the degree of maximum tearing force and are equipped with an eye bolt, which makes it easier to unhook the magnet from the metal surface. The bolts can be attached to the magnet on one side or on the side.

Large selection of search magnets

The magnets themselves are single-sided and double-sided; they do not rust from constant contact with water. In addition to having a hobby and making money from raised scrap metal, you can use magnets to clean wells into which buckets, chains and other metal objects accidentally fall. If you help the locals retrieve a fallen bucket, they will remember you for a long time and will always be happy to see you, keep this in mind.

Single-sided and double-sided magnets available

When working with a search magnet, you need to follow safety precautions, since if your finger gets between the surface of the magnet and the iron, injury cannot be avoided - the magnetization force is such that crushing tissue is guaranteed, so you need to have a first aid kit with you (if you decide to search using a magnet). mandatory.

But you should always remember about safety precautions

In the next article I’ll tell you how to tie a magnet, which rope is better to take so as not to make a mistake.

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Your Alexander Maksimchuk!
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