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DSP, multizone detection boost performance of metal detectors


Manufacturers are also introducing configurations for easy and outdoor installation, and integrating other security functions.




  • Enhanced product reliability: Makers of metal detectors in China are using digital signal processing, and adding microprocessing and programmable scanning features to raise detection sensitivity and reduce false alarms. The latest releases offer sensitivity adjustable up to 255 levels, AGC and multigroup operating frequency to avoid interference. Some upscale models have preset programs to suit various frequency and sensitivity requirements.
  • Multizone coverage: Mainstream walk-through models usually cover six areas, while new variants can support eight to 24 zones for more accurate detection. Many have display bars in the frame to allow monitoring in high resolution.
  • Integrated functions: To work with CCTV cameras, electronic turnstiles, remote controls and computer terminals, EIA-485, RS-242, RJ-45 Ethernet and USB ports are added. Some companies incorporate an X- or Y-ray function to strengthen security.
  • Outdoor & simpler installation pushed: A number of suppliers launched a series of water-resistant models for outdoor settings. They are also optimizing the structural design and circuitry to simplify installation and use.

Metal detector


 Metal detector

Product gallery

Beijing Hewei Yongtai Science & Technology Co. Ltd
Model: HWA003-I
Description: Handheld; three sensitivity levels; three alarm modes

 Metal detector

Guangzhou Tianxun Electronic Equipment Co. Ltd
Model: TX-200PWA
Description: Walk-through; DSP, microprocessor; adjustable sensitivity

 Metal detector

No. 50 Research Institute of China Electronics Technology Group
Model: MD3050
Description: Handheld; four sensitivity levels; light, sound alarm

 Metal detector

Shanghai 21st Century Electronic Equipment Co. Ltd
Model: GC-1019
Description: Handheld; 25cm sensitivity; 6.55 to 6.75kHz; LCD, 2.5in speakers

 Metal detector

Shenzhen Chuangyi Dragon Electronics Technology Co. Ltd
Model: CYL-200
Description: Walk-through; single or multiple alarms; LED indicator, LCD

 Metal detector

Spyonway Electronics Inc.
Model: MD-3003B1
Description: Handheld; 22kHz; >50mA operating current; 270mW power; standard or rechargeable battery

Note: This article "DSP, multizone detection boost performance of metal detectors" was originally published by Global Sources, a leading business-to-business media company and a primary facilitator of trade with China manufacturers and India suppliers, providing essential sourcing information to volume buyers through our e-magazines, trade shows and industry research.

All price quotes in this report are in US dollars unless otherwise specified. FOB prices were provided by the companies interviewed only as reference prices at the time of interview and may have changed.

Disclaimer: All product images are provided by the companies interviewed and are for reference purposes only. Those product images featuring products with trademarks, brand names or logos are not intended for sale. We, our affiliates, and our affiliates' respective directors, officers, employees, representatives, agents or contractors, do not accept and will not have any responsibility or liability for product images (or any part thereof) which infringe on any intellectual property or other rights of a third party.

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