Ensure the metal detector provides precise and adjustable sensitivity settings to accurately identify potential threats without false alarms.

The prices of walk-through metal detectors on the market now range from several thousand to tens of thousands. Faced with walk-through metal detectors of varying prices, people often make blind choices. The following will explain how to choose a walk-through metal detector and several points to note when purchasing a walk-through metal detector.

1. Detection capability

When a person passes through a walk-through metal detector, can it detect the dangerous metal objects hidden in the body 100%, and can it display the location of the dangerous metal objects in multiple sections with high brightness? The detection capability of the walk-through metal detector involves the detection uniformity of sensitivity.

1. Sensitivity: The sensitivity of walk-through metal detectors is divided into A, B, and C levels, with the highest being A, which is generally used in prisons, chip detection and other high-demand industries, while civil aviation requirements are generally B, but the detection uniformity requirements are extremely high.

2. Detection uniformity: This is very important for walk-through metal detectors. Generally, the bottom control detection ability of walk-through metal detectors is weak. Even if the local sensitivity is improved, it is often difficult to reach the highest level requirements. The general test method is to ensure that all locations have an alarm or no alarm for the same metal test object, and each location is tested 10 times. Only a higher level of walk-through metal detectors can achieve uniform detection in each area.

The principle of walk-through metal detector is that when a metal object passes through the magnetic field generated by the pillars on both sides of the door, it will cause magnetic field induction and alarm. This will inevitably lead to the phenomenon that the sensitivity decreases from the two sides of the door panel to the middle area, that is, the sensitivity on both sides close to the door panel is higher than that in the middle. Now many manufacturers of security inspection machines also produce walk-through metal detectors, and claim that they can detect a metal the size of a paper clip, but in fact many manufacturers can barely detect it only when it is very close to the door panels on both sides, and there is no response in the middle. It can detect small metals under the condition of excluding conveyor belt buckles, and can detect controlled knives and firearms under the condition of excluding conveyor belt buckles, keys, mobile phones, and coins.

There is a certain correlation between detection uniformity and stability. There must be no missed alarms or false alarms. A poor quality walk-through metal detector may alarm when it approaches its sensitivity limit, but sometimes it may not alarm.

2. Stability and self-diagnosis function

It has a self-diagnosis function when it is turned on, which can self-discover the faults of each system and display them on the control panel. It can also automatically alarm and stop working when it detects that the surrounding magnetic field affects the work.

3. Anti-interference capability

Whether it is not interfered by security inspection equipment such as security X-ray machines or other electromagnetic signals, and whether multiple detection doors can be discharged at a close distance (less than 15CM) without interfering with each other.

4. Anti-seismicity

The door body cannot make continuous noises when shaking. The stability and anti-interference ability of a walk-through metal detector directly affect the normal use of the walk-through metal detector. Some companies and users do not pay attention to the relevant aspects when purchasing walk-through metal detectors or are deliberately avoided by some manufacturers, resulting in the purchased walk-through metal detectors. The principle of magnetic field induction. When the walk-through metal detector vibrates in the magnetic field or the environmental magnetic field, it is easy to cause false alarms. A high-quality walk-through metal detector should not cause false alarms when no one passes by, even if the magnetic field vibrates (such as strong wind blowing, hitting the door panel to cause shaking). Instead, it will show that the current magnetic field is abnormal, and someone happens to pass by when the magnetic field vibrates. It is also necessary to ensure that the signal returns to normal quickly, and false alarms cannot continue.

5. Detection effectiveness

Generally, walk-through metal detectors have the function of automatically counting the number of people passing through and the number of alarms. If the number of people displayed does not match the actual number of people passing through, it may cause missed reports, which means that there are loopholes in security inspection. A good walk-through metal detector should be able to detect a hundred times a hundred times.

6. Parameterized management

For different security inspection levels or different use occasions, there should be built-in security inspection levels issued by international authoritative organizations, which can provide users with multiple sets of parameters according to different security inspection level requirements, so that they can be directly selected when used. At present, most walk-through metal detectors can provide this quick selection of parameters or remote parameter changes, or formulate and store completely personalized parameter solutions. Some walk-through metal detectors support smart card authorization operations.

7. Qualification and security inspection certification

The production of walk-through metal detectors must pass the quality security inspection certificate with inspection qualifications (according to the inspection performance requirements and inspection methods of GB15210-2003, all test items including environmental adaptability are inspected), and the export must pass the CE certification. The smaller electromagnetic field will not harm pregnant women, life support systems and multimedia disks.

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The above is my sharing about walk-through metal detector. If you want to know more about walk-through metal detector, please contact ZOAN!!!