Space
SensorsYes, I know this part is boring, but one thing at a time. If you would rather set your alarm system up to protect inside the house rather than at door and window entry points, there are various ways:
* Ultrasonic sensors generate high-frequency sound waves. When those waves bounce off an intruder, they trigger an alarm. But some people and pets are bothered by the sound, and they are prone to false alarms.
* Electromagnetic microwaves are a similar method. But these often penetrate walls, and could trigger an alarm if someone walks by your house. Duh!
* A passive infrared sensor detects an intruder's presence by picking up body heat. But other items in the house can emit heat and trigger an alarm.
* Audio detectors can actually hear what's going on in a room. They are set to a certain noise level, and if the level exceeds the threshold, the alarm is triggered. But your alarm co. must be trustworthy, since they could listen in to any conversation in that room.
The simple alarm solution is to alarm the outer doors and windows, and if you insist on also alarming the inside, to use a combination of alarms (your installer can assist there) to prevent false alarms and other problems. But that's probably more than you ever need.
The final alarm note is a silent-duress alarm system, wherein you simply push a button someplace and your alarm company immediately knows there is a serious problem. Those can be placed throughout the house, starting with bedrooms.
Next time we'll talk about how the alarm is communicated to whom and whether it's really worth it.
