metal detector for sales

Posted on 25th Dec 2015 @ 9:59 AM

Nowadays the walk through metal detector is developed faster than before and be increasingly high demand in marketing. So the price is cheaper than before. We have to consider some aspect when we buy the walk through metal detector. Not only consider about the price, but also consider the quality and the service. Then how to buy good walk through metal detector, now let us show you the skills below.

Walk through metal detector can be called security door, so the stability is very important to the security door and the first factor that customer should consider. Unstable security door will happen confuse alarm or miss alarm which can confuse the staff, so it will not achieve real worth. Because of sensor which is two plate of security door outwardly open. It can be launching electromagnetic wave to external environment and receive electromagnetic wave from external environment. There are many equipments produce the electromagnetic wave from external environment, such as high-tension line, large motors, welder and IF furnace, two way radio etc can radiate fusion electromagnetic fields. These magnetic fields will interfere and influence security door that it can’t working normally. So the all the walk through metal detector will be interfered by the external environment more or less. The manufacturers who have the technical strength can solve the stability of security door and can deal with interference from outside that reduce the interference to the lowest.

Generally it should be designed with a real-time security gate signal strength indicator, it can show the size of the metal object and strength of interference signal. Real-time signal indicator is very important when install first time and using. Because it can adjust suitable detection parameters by lights indicated that reduce interference from external environment to lowest, so it will improve the walk through metal detector to do the probing accurately. But some manufacturers cancel the lights for stealthy or turn off the light when no one through that customer believe the security working normally. But this time security door still in the unstable state, it will alarm even you don’t take any metal. If security door is lighting, it will prompt you adjust parameter for exclude external interference to the door and insure it is working normally.

According to above-mentioned, walk through metal detector has environmental self-test function that it can be drain and immunity. If you want know more about it, please check http://www.detectorall.com/categories/Metal-Detectors/  to view.