Wireless alarms systems are one of the many types of home security systems available in the market. But did you know that there are also different types of alarms or sensors that can be used in a wireless alarm system? It is a good idea to get acquainted with some of the different sensors that are available, especially if you are thinking of investing in some type of wireless home security systems. You can then decide if you want to include these in your security setup. Here are four types of wireless sensors:
- Infrared sensors: These are one of the most common types of wireless sensors used in wireless home security systems and they are both affordable and reliable. They detect the infrared radiation emitted by a foreign object in a room. They are able to do so by keeping track of the ambient temperature in the room, and then detecting any change caused by a foreign object that emits infrared radiation, like human beings.
- Ultrasonic sensors: Unlike the above mentioned type of sensors, these sensors don’t detect intruders through measuring a parameter that is already present in a room or interior space. They emit their own form of energy, which here would be ultrasonic sound waves in the range of 15 kHz and 75 kHz. These sound waves are inaudible to humans, but the sensor can detect any change in frequencies caused by object movement. These are not used that frequently in wireless alarms systemsnowadays, or only in conjunction with other advanced sensors.
- Microwave sensors: In a wireless alarm system, you can also find microwave sensors. These too work on much the same principle as ultrasonic sensors. They emit microwave radiation and keep track of the energy reflected from solid bodies. These too detect motion by a sudden change in the frequency of the reflected energy. To eliminate any false alarms, they are often used with an infrared sensor in modern wireless alarms systems.
- Glass break sensors: These sensors are used to detect when someone is trying to break in through a glass window or door. They can work in two ways – they can either detect the sound caused by glass breaking, which surprisingly can sometimes be inaudible to the human ear, or the shock waves caused by a glass pane breaking. The first type needs to be positioned close to the Windows or doors you want to monitor. The shock wave detectors have to be placed directly on the glass panes, in comparison, when used as part of a wireless alarm system.
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