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Alarm Contacts- Contact switches are magnetic switches used to mainly guard doors and windows. There are 3 prominent styles that are employed by most alarm companies. They're recessed contacts, surface mount contacts and roller-ball contacts.

Recessed contacts are concealed in the window tracks and door jams so that they cannot be seen when the window or door is closed. The switch is on a fixed side of the opening and a magnet is placed on the portable side. When the magnet gets together with the switch, the circuit is complete and the control knows it is closed. Recessed contacts are way more complex to install unless they're placed in the construction segment of your home. A good installation technician can install recessed contacts in your house after construction so long as they have an unfinished cellar, accessible attic or closet to run the wires in. Surface mount contacts function the same like recessed ones however they're apparent when the doors or windows are closed. They come in 3 sizes which are large, small and micro. They come in the colours white, grey and brown so they can mix in to the door trim or window-seal they are located on.

Roller-ball contacts are on the hinges of your door jam and the spring-loaded ball is pushed in when the door is closed finishing the circuit. These are much more likely to need replacement in a couple of years as they're considered as moving part. All sorts of recessed and surface mount contacts can be hard wired to your control panel or you can get them in a wireless version. Wireless contacts have a transmitter attached to them or built into them that sends a radio signal to a receiver in the control. The transmitter is surface mounted and comes in 2 colours, white and brown. If white and brown aren't your required colours, you can paint the switches and transmitters to match your decor. Doors are the most typical point of entry and are guarded by this system.

Window contacts can add up in a rush as most houses have numerous windows.If your window is locked (and it should be) whenever you're away or sleeping, a thief has to smash the glass or take away the glass to open it. If they break the glass and the alarm doesn't sound, why would they open the window? Instead they would most probably clear the damaged glass and climb in. That is the reason why your money is better used on motion detectors and/or window contacts which can alert you in case of a glass break. If you have kids, window contacts could be prove to be beneficial. They'll keep your kids from opening the window for a stranger. Window contacts are sometimes better at keeping people in than they are at keeping thieves out. If you do opt for window contacts you will like the plain fact that these surface mounted versions can be set up in such a way that you can keep your window slightly open for ventilation and still be armed at the same time in case of an intrusion.