| A motion detector is a device that contains a | | | | technology detector. This device relies on both |
| mechanism or electronic sensor that quantifies | | | | technologies being active at the same time before an |
| motion. It can be connected with other devices that | | | | internal relay contact is activated. The relay is |
| alert the user of a moving object within the field that | | | | normally used to trigger an alarm. |
| the detector is viewing. | | | | Some Manufacturers make versions of these sensors |
| An electronic motion detector contains a motion | | | | that are "Pet Immune". This means that they will |
| sensor that can change the detection of motion into | | | | mask out the trigger condition, effectively ignoring |
| an electronic signal. Detectable range is typically up to | | | | pets of up to 80 pounds (36 kilos). |
| 50 feet (15 metres). | | | | When used as part of a night vision security system, |
| Modern day motion detectors use a combination of | | | | a motion sensor can be used to trigger the recording |
| different technologies. These are referred to as 'dual | | | | of a video event. Unfortunately, because of |
| technology' detectors. They help guard against false | | | | advances in technology and the introduction of the |
| alarms. False alarms are usually caused by electrical | | | | Digital Video Recorder (DVR) this has become |
| and technical failures. These nuisance alarms aren't | | | | unnecessary. Most DVR's and PC based Recorders |
| usually activated by attackers or intruders but from | | | | utilize a clever software algorithm to provide the |
| wind blown debris, animals, insects and foliage. | | | | motion detection function. Other important security |
| Lightning strikes can also attribute to this. | | | | functions are also available in these systems ie. time |
| A combined PIR (Passive Infrared) and Microwave | | | | and date stamping of motion events. |
| motion detector is the most common type of Dual | | | | |