What kinds of metal detection instruments are there?
Metal detector is a kind of instrument which uses electromagnetic induction principle to detect the existence of metal by using the coil through which alternating current passes to generate a rapidly changing magnetic field. Its main purpose is to detect metals. It is a kind of security inspection equipment, which is widely used in public security anti-terrorism, airports, courts, procuratorates, prisons, stations, museums, gymnasiums, exhibition centers, performance venues, entertainment venues and other places that need security inspection.
In addition to security inspection, metal detectors have many other uses, such as military detection of metal mines, archaeological detection of ancient tombs buried with metal objects, industrial detection of mineral deposits and underground metal objects, and food inspection of metal debris.
2. What kinds of metal detection instruments are there?
Metal detection instruments have many uses, so there are many different kinds of metal detectors. According to different classification methods, the types of metal detection instruments can be divided into:
1, divided by the function
1) all-metal detector
It can detect all metal impurities in different materials, so this product has the highest share in the global market and is also loved by all kinds of users. Moreover, this product has a wide range of uses, mainly used for:
A is specially used for detecting iron and non-iron impurities in meat, fungi, sweets, beverages, grains, fruits and vegetables, dairy products, aquatic products, health products, additives and condiments.
B is used to detect metal impurities in chemical raw materials, rubber, plastics, textiles, leather, chemical fiber and toys.
C used for metal impurities in medicine, health care products, biological products, cosmetics, gifts, packaging and paper products.
2) Ferrous metal detector
Also known as needle detector, needle detector and needle threading machine. This kind of products can only be used to detect iron impurities, mainly used in sewing products industries such as clothing and textiles, and used to detect broken needles in products left over from the production process of sewing products. Special reminder: Needle detector can't be used in food industry, because it mainly relies on physical magnetic field and electromagnetic field for magnetic detection (there is a magnet in the probe of the needle detector). With the weakening of magnet magnetism, the sensitivity of the needle detector will decrease, so the service life of this equipment is short, and the needle detector can only detect ferrous metals, so it is facing elimination in the market.
3) Aluminum foil metal detector
It is mainly used to detect products packed with aluminum film or aluminum foil. Many medicines and foods produced in recent years are packed with aluminum film or aluminum foil, and only this equipment can detect them. The technical level of this product is relatively high and the price is relatively expensive. The general price is above 300,000.
2. according to the purpose.
1) handheld metal detector
A was first used for public security inspection of airports, workshops, docks, publicity and venues.
B is mainly used in industry to prevent the loss of products with extremely high metal content.
In recent years, it has also been used in various exams in China market to prevent candidates from cheating. For example, college entrance examination, postgraduate entrance examination, examination of civil servants and so on.
2) Underground metal detector
It was first used for military mine clearance.
B Explore cultural relics in archaeology and treasure in exploration.
C underground metal detectors are mainly used to detect metal materials, and there is a detection army in China that uses underground metal detectors to detect and excavate waste metals.
3) conveying metal detector
Mainly used to detect small products, as well as small industrial products in bags and boxes, which can be connected with the production line to realize linkage. It is the most widely used product in China.
4) Falling metal detector
It is mainly used to detect powder and small particle products. Mainly used in plastics and rubber industries.
5) Pipeline metal detector
Mainly used for detecting paste and sealing pipeline assembly line. It is convenient to detect and remove metal impurities in pipelines, and is mainly used for the detection of tablets, capsules and granules (plastic granules, etc.). ) and powder articles.
6) Vacuum conveying metal detector
On the vacuum production line with high production requirements. This kind of products have high requirements for the use environment. Mainly used in chemical industry.
7) Pressure conveying metal detector
Mainly used in soy sauce, edible oil and other products with high pollution requirements. Detecting liquid or viscous objects before canning or packaging can effectively improve the detection accuracy.
8) Flat metal detector
Used to detect thin products such as thin sheets and filaments, the price is relatively cheap, and it is suitable for small enterprises.