Magnetic detectors or sensors constitute a part of a system that triggers alarms upon unauthorized entry. They utilize magnetic fields to indicate normal status with a processing unit on one end of the system receives a continuous signal under normal conditions.
However, when unauthorized entry disrupts the magnetic field the sensor then opens a switch that discontinues the signal to the processor. When the processor stops receiving the signal, it triggers the alarm.
Using a Magnetic Sensor for Windows
Many experts recommend magnetic sensors for windows. Owners of many large homes and apartment buildings use these devices in conjunction with locking mechanisms. A magnetic seal is able to withstand approximately one ton of applied force, easily impeding unauthorized access.
In cases of emergency, a button on the inside releases the magnetic seal, allowing exit through the door and resealing the door when it closes. Another kind of magnetic detector, the balanced magnetic switch, utilizes magnets on the moving part of the access point and its frame.
Some experts warn that a danger with regular magnetic detectors entails causing explosions near flammable materials. Balanced magnetic switches are contained within a casing that negates this type of hazard.
Installing a Magnetic Detector Door Alarm
Consumers may choose either a wired or wireless option; however, both choices bring inherent advantages and disadvantages. Some prefer the wireless option as it is easier to install, requiring simple placement on a window or door and does not affect interior aesthetics.
They are operated by remote keyfob radio signals, allowing for quick deactivation. However, wireless systems requiring periodic changes of batteries and the keyfob signal may be susceptible to capture and copying. The wired solution does not present any risk for capturing a radio signal and relies on a single power source, not requiring batteries.
Many people also find the wired system easier to comprehend as the technology is not as sophisticated as the wireless option and it is also less expensive. However, each point of entry requires wiring and homeowners should take care that the wires are not placed within reach of would-be-burglars who may be able to disarm them from outside.
Running wiring through a home also requires aesthetic compromises. If you choose a wired solution, experts recommend several different zones with different control panels. Each zone is independent of the other and this independence allows residents to find unauthorized point of entry more quickly. This solution is also alleviates the need to have the same wires run through every room, and allows flexibility to arm part of the house and not another.
Residents can also specialize different zones for different purposes, e.g., delays for entry or exit.
Alarms may sound due to high winds rattling doors and windows. Also, poorly fit doors and windows may trigger alarms with only slight movement by these access points.
Defeat Measures of Magnetic Motion Detector Alarms
Magnetic motion detector alarms are a generally reliable security measure. However, burglars may try to bypass the sensor through a few means. One way to circumvent the sensor is to penetrate an access point without actually opening it.
For example, a burglar may drill through a door or use a special razor designed for glass to cut through a window. Alternatively, a burglar may disable a magnetic detector using a stronger magnet on the other side of the access point. However, using stronger magnets is not effective against balanced magnetic detectors.
In general, magnetic detectors provide a reliable means for security. Like any security measure it has drawbacks such including nuisance alarms from inclement weather and may simpler models may be defeated using stronger magnets or bypassing the sensors by penetrating access points without moving them.
Therefore, like most types of security measures, they are most useful as a component of a more comprehensive system.