The more sophisticated burglar alarms use motion sensors. These sensors use infra red rays to sense movement. The change is transmitted to a control panel that analyzes the signals. If the signals are beyond the high suspicion levels, the alarm is triggered.
Several Americans prefer to install both motion sensors as well as electric circuit-based alarms to give added protection to their homes. The advantage of such a system is that large, open spaces like halls can be guarded better with sensors.
Many home burglar alarm systems use video cameras. These cameras are mounted at different strategic places around the house. Their job is to transmit images to a central monitor in the house for screening.
Several home security companies also provide centralized monitoring of the premises. The home owner, in this case, need not worry about security but leave it to the security company. When the alarm is triggered the security company informs the local police. In some cases it also rushes its own emergency team to help the customer.
Keywords: Home Security