How to select Walkhthrough metal detector

There are five major issues to be aware of when purchasing security gates: the effectiveness of security gates, the seismic resistance of security gates, the sensitivity of security gates, the stability of security gates, and the qualification and certification of security gates.

1. The effectiveness of security check doors. Metal detection security doors have automatic statistics "pass number" and "alarm times" function. If the number of people shown does not match the number actually passed, it may result in a missed report, which means there are loopholes in the security inspection. A good security gate should be able to go 100 times to detect one hundred times.

2. Seismic resistance of security door: The door body cannot ring continuously when shaking. The stability and anti-interference ability of a security door directly affect the normal use of security doors. Some companies and users did not pay attention to the relevant aspects or were deliberately avoided by the manufacturers when they purchased the security gates. As a result, the stability of purchased metal detection security doors was poor, and there were many signs of false positives, which seriously affected the normal use. Based on the principle of the magnetic field induction of the security door, when the magnetic field of the security door generates vibration, it is easy to cause false alarms. A security door that passes the quality check does not cause false alarms even if no one passes, even if the magnetic field oscillates (such as strong winds or flapping the door and causing the door to shake). When the magnetic field oscillates, it is precisely when someone passes, and it is also necessary to guarantee a rapid return to normal, and it cannot always be a false alarm.

3, security door sensitivity. A pin can be detected in the middle of the door. Because the principle of the security door is that when a metal object passes through the magnetic field generated by the columns on both sides of the door, it will cause magnetic field induction and alarm, which will inevitably lead to the phenomenon that the sensitivity will decrease from both sides of the door panel to the middle zone, ie, both sides close to the door The sensitivity is higher than in the middle. Many security door manufacturers now claim to be able to detect a pin-size metal, but in fact many manufacturers can barely measure it when they are close to the two door panels, and there is no response at all in the middle. In the case of excluding belt buckles, it is necessary to be able to detect small pieces of ferrous metal. In the case of excluding belt buckles, keys, mobile phones, and coins, it is necessary to detect controlled tools and firearms.

4, security door stability: carrying a pin in the middle of the door should go once once, can not miss the report and report. Poor quality security gates will alarm when approaching their sensitivity limits, and sometimes do not alarm, and put things in the three areas, showing the alarm in five locations.

5, security gate qualification and certification. The production of metal detection security doors must have a production license issued by the Ministry of Public Security, must hold a quality and safety inspection certificate issued by the public security department, and the export must pass the ce certification. Many do not have the relevant qualifications and certifications. The majority of users must understand clearly before buying.