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  • Dongguan Meidele Metal Detector Factory
  • ADD: Dongcheng District, Guangming Village, Wanhang Technolog Park, Dongguan City of Guangdong Province, China.
  • TEL: +86-769-23165658
  • FAX: +86-769-23165648
  • E-MAIL: aronwang@meidele.cn
  • Advantages and disadvantages of the needle detector
    Oct 09, 2018

    Advantages: The needle detector is cheaper and is suitable for most sewing products. It only needs to detect broken needles (such as: must install copper or non-ferrous alloy buttons, zippers, bead chain clothing, toys, handbags, etc. Products), has been accepted by the majority of users, as long as the performance of needle detectors provided by regular manufacturers in China can be comparable to imported needle detectors.

    Disadvantages: A. The needle detector technology is only improved and improved. However, since the principle of the needle detector is the principle of magnetic induction, only ferromagnetic metals (iron, cobalt, nickel and alloys containing these metal impurities) can be detected. Other high-purity fine metals, that is, if the product contains a small amount of high-purity non-ferromagnetic metal impurities other than ferromagnetic metals, the needle detector has no way to detect it.

    B. The inside of the probe of the needle detector is a permanent magnet. However, after years of use, the magnetic force will gradually decrease and the sensitivity may decrease. This also poses a safety hazard for industrial inspection. The needle detector must be used periodically. The needle machine nine-point test method is used for testing and calibration to ensure the efficiency. For products that need to detect all metal foreign objects (clothes, handbags, etc. without metal fittings), all-metal detectors can be selected according to actual needs!