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+--- Thread: Door Alarms (/thread-4915.html)
Door Alarms - tokmik - 02-03-2010
There are a variety of door alarms on the market, and pinnacle security professional staff can help you choose the right style for your needs. While door alarms make up only one aspect of a total home security system, they are often the first item considered. This is because our doors are the most obvious entrance to each house. It is through our doors that we welcome guests into our homes. Unfortunately, they also pose a point of entry for intruders.
The basic concept behind door alarms is to create an electrical circuit. In some cases, the circuit is closed when the door is closed. This allows electricity to flow back and forth between the two contact points. When the door is opened, the circuit is broken and the alarm sounds. In other cases, the opening of the door actually closes the circuit, sounding the alarm.