When it comes to the technology used to activate a motion sensor and motion sensor alarm, there are several different types. Each works in a different way. Some of the most common types of motion detectors include:
Passive Infrared motion sensors (PIR) – Most commonly used in home security motion sensors, a PIR sensor detects body heat in its field of vision.
Active motion sensors – Otherwise known as Microwave motion sensors, this type of sensor emits microwave pulses to a defined area, then measures the amount of time it takes the waves to bounce back. If a person or object interferes with the signal, it delays the return time, setting off the motion alarm.
Dual-technology motion sensors – Typically consisting of both microwave and PIR sensors, dual-technology motion detectors attempt to reduce false alarms because both sensors must go off to trigger the motion alarm. Pets have been known to trigger false alarms, but there are specific ways to prevent this.
There are pros and cons to each type of motion sensor, but see why the Vivint wireless motion sensors are the right choice for your home.