Driveway Alarm Systems
Driveway Alarm Systems such as the Driveway Informer, Voice Alert System 6 are movement based driveway alarm and driveway alert systems.
These systems typically work through the use of PIR, infrared, based sensors such as the sensor used in the Di2000S-A Wireless Driveway Alarm System. These sensors are going to pick up any type of movement that crosses the path of the sensor. These driveway alarms system may be used to monitor a driveway but are also versatile enough to use in many other applications. For example, the PIR systems may be used to monitor movement around a pool, shed, or other places.
Other Driveway Alert systems carried by Security2020.net are typically either based on a magnetometer which picks up movement of large metallic objects. An example of this is the Driveway Monitor Alarm System. Because this system detects movement of metallic objects, it is limited to applications where you will have movement of cars, trucks, or other automobiles.