A security system is installed for occupant health or safety or to protect the building from intruders/invasion. The main difference between the various security systems is the type of sensors used and the way in which the system is monitored.
Here are a few examples:
This is the most common alarm that triggers light fixtures and alarms inside or outside the home. It can differentiate between a 30 lb. dog and a 165 lb. burglar.
Window/door opening detectors:
These are the most popular type of alarm. They warn occupants that someone has entered the home.
Installed inside of the entry doors to indicate someone has entered the home.
Glass break/noise sensors:
Indicates that a window has been broken by an intruder trying to access the home.
Records activities in certain areas in and around the home and monitors these areas on video monitors. Some systems can be controlled via the internet.
Carbon monoxide and/or smoke detectors:
Can be incorporated into most security systems to alert occupants if there is a problem with the indoor air quality.
Senses low temperatures (which may cause pipes to freeze and water damage) and/or high temperatures (indicating a fire).
Detect leaks from appliances, sump pits or basement wall/foundation leaks.
Used in earthquake-prone areas to provide early warning of an earthquake’s sound waves before the earthquake causes damage.
Pool alarms and sensors:
Used to monitor a swimming pool and activates if someone falls in.
This is a type of sensor that keeps track of the ambient room temperature. If a body enters the room, the room temperature changes and the sensor detects the change. Some sensors use passive infrared sensors as well as Doppler technology, which detects a moving mass.