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This section provides an overview for metal detectors as well as their applications and principles. Also, please take a look at the list of 0 metal detector manufacturers and their company rankings.
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1987~1991: Engaged in research on wire covering materials at Polymer Materials Laboratory.
1991~1997: Worked as a patent Engineer at Koike International Patent Office.
1997~2005 Worked as an intellectual property member at GE Yokogawa Medical System, currently working as a writer.
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https://researchmap.jp/0315rs2017
A metal detector is a detector that checks for the presence of foreign metal objects in a sample.
They are widely used in the food and pharmaceutical industries. Metal detectors can detect metal objects that are too large to be visually inspected. It can detect foreign objects more reliably than visual inspection.
Typical food items that can be inspected with metal detectors are dry foods such as noodles and confectionery, wet processed foods such as raw meat and fish, and foods packaged in aluminum vapor deposition such as frozen foods and snack foods. However, it should be noted that the moisture content, salt content, and temperature of the object may affect the results.
Metal detectors are often used to inspect products that enter the body, such as food and pharmaceuticals. In particular, they are used to ensure food safety under the HACCP (Hazard Analysis Critical Control Point). The use of metal detectors in food factories is increasing as sanitation control methods become fully mandatory under the HACCP.
In addition to metal detectors, X-ray foreign matter detectors are available as devices for detecting foreign matter in food products. Since metal detectors are specialized for detecting metals, they are easy to introduce because of their relatively simple structure, low price, and compact size.
In contrast, X-selective foreign matter detectors can detect glass and resin in addition to metals, but they are relatively expensive and sometimes difficult to introduce due to their complex structure and large size. Therefore, depending on the object and budget, they are used individually or in combination.
Metal detectors are classified into AC type and DC type according to their detection principle.
The main feature of AC metal detectors is that they can detect both magnetic and non-magnetic metals. The AC type metal detector consists of a transmitter coil that emits an AC magnetic field and two differential receiving coils installed opposite each other. A sample is then placed in the space between this transmitter coil and the two receiver coils for metal inspection.
If there is no metal in the sample between the transmitter and receiver coils, the two receiver coils receive magnetic field lines of equal strength from the transmitter coil. However, if there is a metal with magnetism, the alternating magnetic field emitted from the transmitter coil magnetizes the metal, attracting the magnetic field lines to the metal side and creating a difference in the magnetic field lines received by the two receiver coils, which allows detection of the metal. Metals with magnetic properties include iron, cobalt, and nickel.
If there is a non-magnetic metal that has no magnetism, the AC magnetic field from the transmitter coil generates eddy currents around the non-magnetic metal. The magnetic field near the nonmagnetic metal, which changes due to the eddy currents, can be detected by the receiving coil. Nonmagnetic metals include aluminum, copper, and stainless steel.
In addition, some AC type metal detectors transmit magnetic field lines of multiple frequencies from the transmitter coil. This is because the optimum frequency for detection varies depending on the type and shape of the metal. By sequentially emitting magnetic field lines of multiple frequencies, optimum detection can be achieved.
The main feature of DC-type metal detectors is that they can detect magnetic metals mixed in retort pouch foods and snack foods that use aluminum as the packaging material. The DC metal detector uses a permanent magnet to apply a magnetic field to the sample.
If the sample contains a magnetic metal, the metal is magnetized and its internal spins are aligned in one direction. When the metal spins in the sample are aligned and pass between two coils, called pickup coils, an electromotive force is generated by Faraday's law of electromagnetic induction, and this is detected to determine the presence of metal.
Note that aluminum is a non-magnetic metal, so it is not magnetized, and only the magnetic metals in the sample are detected.
Metal detectors are calibrated using a test piece, typically made of iron or stainless steel, to quantitatively check performance and characteristics. Rather than calibrating only the test piece by placing it over the metal detector, it is better to place the test piece in the same container as the actual sample or to attach it to the sample for more accurate calibration.
When fixing the test piece to the sample, depending on the shape of the sample, it may not always be fixed stably. Since any change in the fixation of the test piece will affect the calibration, various methods are employed to fix the test piece to the sample.
One example is to place the test piece in the pocket of a plastic bag with a pocket and cover the sample. In this method, the sample and test piece are wrapped together in the plastic bag, and the test piece can be fixed in the desired position. In addition, the vinyl material is less susceptible to magnetic fields, making the method using a vinyl bag suitable for calibration.
Another method is to use rubber bands to secure the test piece to the sample. Rubber bands are also suitable for calibration because they are less likely to be affected by magnetic fields. Another method is to attach the test piece to a basket made of a resin material that does not easily affect the magnetic field, and place the sample in the basket for calibration, which is used when the sample has many irregularities.
In the method of fixing the test piece to a special jig, a special jig is created to support a product that easily falls over, such as a stand pouch, and the test piece is fixed to this jig.
*Including some distributors, etc.
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158 products found
158 products
A and Day Co., Ltd.
1380+ people viewing
Last viewed: 14 hours ago
■The combination of weight checker and metal detector saves space. The WCM series allows for high-precision weighing and high-sensitivity detection...
2 models listed
Saiga Institute of Technology, General Incorporated Foundation
1000+ people viewing
Last viewed: 1 hour ago
■Features ・Simple and compact ・Easy and easy to use for anyone ・Vibration-resistant design allows stable operation even when installed directly ...
NIP
1010+ people viewing
Last viewed: 5 hours ago
It is a metal detector with a belt width of 250mm. It supports various products and production lines such as food, resin, and pharmaceutical produc...
Saiga Institute of Technology, General Incorporated Foundation
870+ people viewing
Last viewed: 19 hours ago
■Highest sensitivity in the industry ・Stainless steel 0.15mm/iron 0.1mm detection/removal *According to our research_Metal detection using natural...
ML Engineering Co., Ltd.
390+ people viewing
This reduces quality deterioration and machine trouble due to metal contamination, and prevents downtime. ■Features ・Highly sensitive selection o...
NIP
860+ people viewing
Last viewed: 3 hours ago
It is a wide type with a wide metal foreign matter detection machine belt 500mm wide. ■ Characteristics ･ It is a specification that can be used f...
Saiga Institute of Technology, General Incorporated Foundation
640+ people viewing
■Features ・Compatible with waterproof and dustproof standards (IP55), ideal for powder materials ・The part in contact with powder has few irregul...
Asahi Manufacturing Co., Ltd.
230+ people viewing
■Product overview We use equipment to check whether metal foreign objects are mixed into products before shipping, allowing us to provide linen tha...
NIP
850+ people viewing
Last viewed: 6 hours ago
It is a metal detector for each box and large products. Suitable for meat and rice. ■ Characteristics ･ You can inspect the products and raw mater...
ML Engineering Co., Ltd.
350+ people viewing
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This reduces quality deterioration and machine trouble due to metal contamination, and prevents downtime. ■Features ・Accurately detects and separ...
NIP
550+ people viewing
Last viewed: 17 hours ago
Metal detection machines support various forms such as powder, liquid, and after wrapping. Metal foreign substances are detected from products suc...
Sanetech Co., Ltd.
330+ people viewing
This sensor is ideal for coin identification, counting, metal detection, and positioning. ■Features ・High sensitivity differential magnetic senso...
2 models listed
ML Engineering Co., Ltd.
350+ people viewing
This reduces quality deterioration and machine trouble due to metal contamination, and prevents downtime. ■Features ・Separate iron and magnetic m...
NIP
740+ people viewing
It is a metal detection machine for space -saving spaces of inclined conveyor. Metal detection is possible while transporting from a low position t...
Irie Co., Ltd.
520+ people viewing
■Summary This is a tabletop tilting metal detector. Just turn it on and slide it on. It is possible to detect metals without being affected by alum...
NIP
850+ people viewing
Last viewed: 5 hours ago
It is a small, carried and can be placed on a desk. Place the product at the right end and slip with your own weight. Detects metal foreign substan...
Irie Co., Ltd.
880+ people viewing
Last viewed: 1 day ago
■Summary The metal detector ``Oboshi®'' is compatible with aluminum vapor-deposited, high-salt, high-temperature, and low-temperature products. It ...
Magnetec Japan
630+ people viewing
Last viewed: 23 hours ago
■ Characteristics ･ Dustproof/waterproof IP65 compliant ･ Automatic sensitivity setting function ･ Easy operation with 7 inch color touch panel (wi...
3 models listed
SANKO ELECTRONIC LABORATORY CO.,LTD
490+ people viewing
Last viewed: 1 hour ago
■ Features ・ Ultra -high sensitivity can be inspected even with aluminum wrapped items ・ No effects of moisture, salt and temperature contained i...
2 models listed
A and Day Co., Ltd.
770+ people viewing
Last viewed: 24 minutes ago
Achieved both oxygen absorber shortage inspection and foreign object inspection ・Compatible with oxygen scavenger shortage inspection and foreign...
5 models listed
A and Day Co., Ltd.
440+ people viewing
Last viewed: 3 hours ago
High sensitivity ・Easy and high-quality traceability management ・Improved maintainability with sanitary structure ・Improved work efficiency Fea...
5 models listed
A and Day Co., Ltd.
310+ people viewing
Last viewed: 19 hours ago
Large type with belt width from 400mm to 1500mm. Customization is possible according to customer requests. ■Features ・Belt width is from 400mm to...
2 models listed
A and Day Co., Ltd.
360+ people viewing
Last viewed: 11 hours ago
Capable of detecting magnetic metals in aluminum packaging products with high sensitivity. It is also possible to measure thick containers such as ...
2 models listed
A and Day Co., Ltd.
440+ people viewing
Last viewed: 4 hours ago
Metal detection in particle/liquid conveyance lines is possible with high sensitivity. We have many achievements with food, chemical, and pharmaceu...
6 models listed
A and Day Co., Ltd.
800+ people viewing
Last viewed: 2 hours ago
■Metals precipitated in containers can be detected By limiting the generation area of the alternating current magnetic field, which is the basic ...
Japan Metal Detector Manufacturing Co., Ltd.
440+ people viewing
Last viewed: 1 day ago
■Product description ・This is a common type that reacts while grasping a metal object. - Suitable for relatively shallow depths.
Japan Metal Detector Manufacturing Co., Ltd.
360+ people viewing
Last viewed: 23 hours ago
Product description ■For iron only. This is a handheld metal detector that detects if you forget to remove the tux used during shoe manufacturing. ...
Japan Metal Detector Manufacturing Co., Ltd.
660+ people viewing
Last viewed: 9 hours ago
■Detection ability ・Gold (27✕17✕1.6t・10g・24k gold) /120mm ・Iron (50✕50✕2t) /190mm ・Iron (Φ20✕1t) /110mm ・Stainless steel (50✕50✕2t) /170mm ・...
Japan Metal Detector Manufacturing Co., Ltd.
360+ people viewing
■Summary ・Detects all metals, including non-magnetic materials such as aluminum and stainless steel, and magnetic materials such as iron. -A small...
Semco Co., Ltd.
330+ people viewing
Last viewed: 2 hours ago
Features - Metal detectors installed in pipeline systems, such as gravity falls, pneumatic transport lines, those in which raw materials slowly des...
