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What factors make it difficult to be detected by metal detectors?

What factors make it difficult to be detected by metal detectors?

Issue Time:2020-10-27

Metal impurity detection is very important for factories and enterprises, so the metal detector machine needs to have high accuracy, but it is difficult to avoid detection omissions during use. What factors make it difficult to be detected by the metal detector machine?

Metal factor: Different metals are difficult to detect by equipment due to their own characteristics. Metals with conductive and magnetic properties such as iron, steel, chromium, carbon steel, tungsten carbide, etc. are very easy to be detected. Pure, high-resistance and non-magnetic metals, such as 304 and 316 in stainless steel, are difficult to detect. In addition to the characteristics of the metal itself, the direction and position of the metal contaminants in the tested product will have an impact!

Equipment factors: different manufacturers and types of metal detector machine products have different accuracy and sensitivity. The factors that affect the equipment itself include opening size, machine frequency, operating speed and belt signal size. The larger the opening size, the lower the detection sensitivity, the smaller the opening size, the higher the relative detection accuracy. The higher the machine frequency, the higher the corresponding detection sensitivity!

Environmental factors: The surrounding environment is also easy to affect the equipment. Electromagnetic interference of the power supply of the detector, equipment vibration, temperature changes, and changes in the surrounding magnetic field will cause false alarms of the detector. Such environmental factors can only be passed through a good design. Solution to solve this problem, otherwise the false alarm can only be solved by reducing the sensitivity or improving the environmental impact!

Product factors: Different products have different product effects. This is because the product's own moisture, salinity, and conductivity are different. The more salt and acid content in the product, the stronger the conductivity and the greater the product effect. , Relative detection is more difficult, so it is necessary to adjust the detection sensitivity according to different products!

The above factors are likely to cause metal impurities to be difficult to be detected by the equipment, so in the case of detection work, try to avoid the above-mentioned situations and choose the appropriate metal detector machine equipment, and the equipment needs to be adjusted according to different products. !


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