ikkunahälyttimiä

Ikkunahälyttimiä, or window alarms, are small electronic devices designed to detect unauthorized entry through windows. They typically function by sensing vibrations or changes in air pressure that occur when a window is forced open or broken.

There are several common types of window alarms. Some are contact-based, consisting of two parts that are attached to the window frame and the window itself. When the window is opened, the connection between the two parts is broken, triggering the alarm. Other types are vibration-sensitive and use an accelerometer to detect the shock or rattling of a window being tampered with. Air pressure sensors are less common but work by detecting a sudden change in air pressure when a window is opened.

Most window alarms are battery-powered and are easily installed with adhesive backing, requiring no complex wiring. When triggered, they emit a loud siren sound to deter intruders and alert occupants or neighbors. Some modern wireless window alarms can also send notifications to a smartphone or a central security system.

Window alarms are a relatively inexpensive and simple way to enhance home security, particularly for ground-floor windows or those in less visible locations. They can be used as a standalone security measure or as an addition to a more comprehensive alarm system. Their primary purpose is to provide an audible warning of attempted or successful break-ins.