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Explore the city's protective function is more important than anti-theft function
In the three-ring decoration city, Taianju, Liyuan home these large building materials stores, found that sales of stealth anti-theft network is still small, there are two kinds of stealth anti-theft network sold, one is invisible anti-theft alarm without performance Network, also known as stealth protection net, the other is with alarm function.
The author saw the same type of invisible security net that he saw in the three-ring decoration city under the big word “invisible protection net†written in the Yarn Window Store of Tai’an. When asked about the difference between this and the invisible protective net, the clerk said that this stealth anti-theft net is not alarm function, generally used to prevent children, flower pots, clothes, etc. fall downstairs to ensure personal safety, anti-theft effect Not obvious. Ms. Tan of the Three-ring Decorative City good window decoration counter also said that in fact, the invisible security network security effect is not very strong, or called the invisible protection network is more suitable.
Three conditions can lead to alarm failure
According to Kang Xue of the Three-ring Decorative City Kangxue Door and Window, the invisible anti-theft net was cut without sounding an alarm, which may have caused the protective film to be eroded. Although the anti-theft net steel wire coated with a multilayer Oxford high temperature corrosion resistant protective film, but for a long time, the middle of the conductive copper wire may still be affected by the rain and failure, there is a wire rope was cut by the thieves and can not hear the alarm sound Case. At the same time, if the interface between the invisible anti-theft network and the alarm is improperly connected or the battery is dead, the alarm will not be able to alarm normally. Ms. Tan also said that invisible network security will be due to rain erosion, improper connection, battery power, etc. can not alarm.
Cost of wire rope by thickness 70-230 yuan / square meter
It is understood that the stealth anti-theft nets currently on the market are generally used 304 profiles, 202 profiles easily rust, and now basically no need, 316 profiles used less. Ms. Tan introduced that the general judgment of the quality of steel wire ropes must first look at its diameter, the larger the diameter of the anti-theft performance is also better, followed by the wire rope is not even, there is no broken wire phenomenon. The wire rope and aluminum profile of the invisible anti-theft net are calculated together and are not priced separately. The bare metal (without alarm) costs vary depending on the thickness of the steel wire rope. The 2mm is generally between 70-100 yuan/m2. , 2.5mm about 100-130 yuan / square meter, 4mm need 180-230 yuan / square meter. If you install an alarm, you can add 50-100 yuan/piece.
Case: Stealth burglar has been cut by the thief but no alarm has been issued
According to netizens who broke the news on the banks of the West Lake, in June this year, an invisible security net was cut off at the Nanshan Mansion. The security net did not issue an alarm, and the thief continued to steal homes from the house. A mobile phone, laptop, and room were placed by the owner in the living room. The wallet was stolen. "Even if you cut off the normal alarm, the sound is very small. For people who are asleep or watching TV, they do not hear it at all. It seems that the hidden security net is not so safe," said another poster "lostkey". .
Small Classroom: What is Invisible Security Network?
According to Ms. Tan of the Three-ring Decorative City good window decoration counter, the invisible anti-theft network system consists of aluminum profiles and wire ropes. The wire rope consists of several or dozens of small steel wires wrapped in a conductive copper wire. It also needs to be installed inside the corner of the wall. Alarm. Invisible security nets generally use wire ropes with diameters ranging from 2mm to 4mm. Wire ropes can withstand tensile forces of 85-120KG or more, which can ensure that thieves cannot break. The standard distance between steel ropes is 5cm, and people cannot climb into the gap.
Invisible security network alarm failure solution analysis
Stealth security network, as the name suggests is used to prevent theft, but a few days ago, households with invisible security nets were thieves. Some citizens reported that the invisible anti-theft network installed in their homes was cut off by thieves. The thieves were able to divert their homes and steal their belongings, but they did not hear the alarm sounds at midnight. According to Ms. Tan of the Tri-Ring Decorations Co., Ltd., the invisible anti-theft net has the functions of protection, anti-theft, and aesthetics. Alarm failure may be related to rain erosion, improper connection, and lack of battery power.