How do you know how to buy a security door? How to choose a satisfactory security door? Today, Fangji Infinite Security Door Manufacturer tells you what are the main points of purchasing a security door:

1. Sensitivity and uniformity

When the human body passes through the security door, can 100% detect the dangerous metal hidden by the human body, and can display the location of the dangerous metal in multiple sections of high brightness. The detection capability of the anti-theft door involves the consistency of sensitivity detection.

1. Sensitivity: The sensitivity of the safety gate is divided into two categories, A and B. The highest C level is A level. It is generally used in high-demand industries such as prisons and chip detection. The requirements of civil aviation are generally B level, but the detection uniformity Requirements are high.

2. Detection uniformity: This is very important for anti-theft doors. Generally, the bottom control of anti-theft doors is weak. Even if the local sensitivity is increased, it is often difficult to meet the highest level of requirements. The general test method is to ensure that all locations can alarm the same metal detection object With or without alarm, each location is tested 10 times, and only higher-level safety gates can achieve uniform detection in each area.


The principle of the anti-theft door is that when a metal object passes through the magnetic field generated by the columns on both sides of the door, causing a magnetic field induction alarm, it will inevitably cause the sensitivity of the center area on both sides of the door panel to decrease, that is, the sensitivity on both sides near the door panel will be high In the middle area. Now, many manufacturers of security inspection machines also produce security doors and claim that they can detect metal-sized paper. But in fact, many manufacturers can only detect when the two sides of the door are very close, there is no reflection at all. In the case of excluding conveyor belt buckles, small metal blocks can be detected, and in the case of excluding conveyor belt buckles, keys, mobile phones, and coins, control knives and firearms can be detected.

There is a certain correlation between the detection uniformity and stability. It can not be false alarm and false alarm. The quality of the safety door close to its sensitivity limit will have an alarm, and sometimes no alarm.
2, stability and self-diagnosis function
It has a self-diagnosis function, which can automatically discover the faults of various systems and display them on the control panel. It can also detect the influence of the surrounding magnetic field on the automatic alarm work, indicating that it has stopped working.
3. Parameterized management
According to different security inspection levels or use occasions, the security inspection levels promulgated by international authoritative organizations should be built in. Users can provide multiple sets of parameters according to different security inspection levels, which is convenient to use. At present, most anti-theft doors can provide such quick parameter selection or remote parameter changes, or develop a complete personalized parameter storage program, and some anti-theft doors support IC card authorization operations.

4. Qualification and security certification
The production of safety doors must pass a qualified quality and safety inspection certificate (in accordance with the test performance requirements and test methods of GB15210-2003, all test items including environmental adaptability are tested). Export must pass CE certification, and the small electromagnetic field will not cause damage to pregnant women, life support systems and multimedia disks.

5, detection effectiveness

General security gates have the function of automatically counting the number of passers and the number of alarms. If the displayed number of people does not match the actual number of people, it may cause underreporting, which means that there are loopholes in the security check. A good security door should be able to walk 100 times and test 100 times.

6. Anti-interference ability

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


7, seismic resistance
The door body can't ring continuously when shaking. The stability and anti-interference ability of a security door directly affect the normal use of the security door. Some companies and users do not pay attention to the relevant aspects or are some manufacturers when purchasing the security door. Intentional avoidance, the principle of the magnetic field induction of the purchased security door. When the security door vibrates in the magnetic field or the ambient magnetic field, it is easy to cause false alarms. A security door that passes through the security level, even when no one passes, even if the magnetic field oscillates (For example, strong wind blowing, flapping the door panel to produce shaking) There should be no false alarms. Instead, it shows that the current magnetic field is abnormal, and someone passes when the magnetic field oscillates. It is also necessary to ensure that the speed of the message returns to normal, and not to stop false alarms all the time.