How do glass break detectors function?

Question

Hi there. I’m considering having a new alarm system fitted in my property. I’m just wondering, how a glass break detector functions and how is it different to say a window sensor? Is it more sophisticated? Can it detect glass break where a window sensor might not??

Anthony · Accepted Answer

When a pane of glass shatters, it creates a distinct sound frequency. An acoustic glass break sensor works by “hearing” the sound of shattering glass, then triggering an alarm.
This can be used a room that as multiple windows.

Joshua · Answer

The break sensor is acoustic detecting and tuned to the sound of glass breaking as opposed to porcelain for example.  So should in theory only alert only if your window is smashed.

Essentially the benefit of a glass break sensor as opposed to window proximity sensors is that you could use a single break sensor in place of two or more proximity sensors. This would be the case in some situations where you have multiple windows in a room as the break sensors typically trigger up to twenty feet away.

Eric · Answer

A window sensor detects the framework by using a magnet e.g. when open, the circuit is broken. Glass detect sensor is activated by vibration on glass when broken.

Sarah-jane · Answer

Window-vibe/sensors work on impact vibration. Break glass  detectors are mounted in the room they pick up the window being broken. These use a audio microphone that recognises the frequency of broken glass. Some will pick up the vibration on the glass. They will alarm if the right frequency is picked up. These tend to be more popular.

Ben · Answer

Hi, we use shock sensors on windows and doors mounted on the door frame or window frame they work from vibration for example if some one was to kick your door or bang your window the vibration triggers the sensor which triggers your alarm. You can change the sensitivity up or down depending where they are. They can also be doubled up as contacts with magnets the same as old style door and window contacts, hope this helps.

Ben Carroll
Smart vision security solutions

Alexander · Answer

Hi Harry, 

Glass break detectors complement door and window sensors by monitoring sound or vibration. When they detect the frequency of shock waves associated with glass shattering, they sound an alarm.

How do glass break detectors function?

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