Door and window burglar alarm price

With the continuous development of society, people's living standards are also constantly improving. As we all know, door and window burglar alarms play a very important role in our daily life and are widely used by many families. Many families choose anti-theft devices for doors and windows for safety, and the price is not expensive. Then, what is the price of the door and window burglar alarm? What are the purchasing skills of door and window burglar alarm?

I. Price of burglar alarm for doors and windows

1, Ketai burglar alarm home shop doors and windows wireless mobile phone gsm infrared smart home security system, reference price 178 yuan.

2. Likean remote door and window alarm Wireless remote door magnetic door and window protection guard door and window burglar alarm, reference price 16 yuan.

3. Doors and windows burglar alarm system of household human body induction wireless infrared burglar alarm in shops. The reference price is 53 yuan.

4. Gao Chuang security mobile phone card burglar alarm wireless infrared household burglar alarm G3, the reference price is 498 yuan.

5. The wireless infrared alarm telephone for carving sharp doors and windows, the home infrared anti-theft alarm host for remote shops, the reference price 166 yuan.

6. Qiyang QY-238W Home Intelligent Burglar Alarm Store Windows and Doors Balcony Infrared GSM Alarm Host, the reference price is in 230 yuan.

Second, the door and window anti-theft alarm purchase skills

1. When purchasing an anti-theft alarm, the active infrared alarm means that the alarm actively emits infrared rays. When the infrared ray hits an obstacle, it will bounce back and be received by the probe of the alarm. If the probe detects that the infrared ray is still, that is, the red line is constantly emitting and bouncing, then the alarm will not give an alarm. When a moving object violates this invisible red line, the probe will detect the abnormality and give an alarm.

2. Another point is that the passive alarm does not use infrared rays with fixed frequency. Physically, we have been told that all objects whose design temperature is higher than positive zero (-273. 15℃) can generate infrared rays, and when the infrared rays received by the alarm exceed a certain set value, an alarm will be triggered. This kind of alarm is prone to false alarm due to the influence of weather, and is generally installed on remote doors or windows.

The above is the price and purchasing skills of door and window burglar alarm introduced by Bian Xiao. If you want to know about the door and window burglar alarm, you can refer to Bian Xiao's introduction, hoping to help you.