Here’s some information about “door alarms” and recognized as “door sensors” for inhabitants of Houston Texas. Since it is a the fact that in excess of 80% of break-ins occur through a doorway, the door sensor is without a doubt the mainly significant device built-in to any security system. A number of door or window sensors are hard-wired to an electric circuit inside the property. The system is activated when a door or window is opened – causing a break in the flow of voltage to the circuit – then causing the alarm to activate. Other door or window sensors transmit a signal wirelessly to the panel which in turn activates the alarm. The Smith & Wesson Houston Texas Central Station Monitoring center and Houston police are rapidly notified when this occurs.