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1, sensitivity.
A pin can be detected in the middle of the door. Because the principle of the security door is that when the 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 the two sides of the door panel to the middle area, that is, both sides close to the door board. The sensitivity is higher than in the middle. Many security door manufacturers now claim to be able to detect a pin-sized 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.
2. The shock-proof door body can not continuously ring 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 notice the relevant aspects or were deliberately avoided by the manufacturers when they purchased the security inspection door, resulting in poor stability of the purchased security door. If there is any sign of trouble, the company will continue to report false positives and seriously affect normal use. 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, 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.
4. Validity of door measurement The security door has the functions of automatic counting of "number of passes" and "number of alarms". If the number of people shown does not match the number actually passed, it may result in a missed report, which means that there are loopholes in the security screening. A good security gate should be able to walk one hundred times and detect one hundred times.
5. Qualification and certification Security door production must have a production license issued by the Ministry of Public Security. It must hold a quality and safety inspection certificate issued by the public security department. 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.
Buying security doors should pay attention to five major issues and security door certification
There are five major issues to be aware of when choosing security doors: security door security, security gates, earthquake resistance, security gate stability, security door detection effectiveness, and security gate qualification and certification.