CONCORD QV5200 Manual page 45

Chapter 6 Channel Setup
6.8 PIR Set-up
While Motion Detection is ideal for areas where there usually isn't any motion such as the
interior of a home when everyone is out, the same isn't necessarily true for the exteriors.
Here you could have trees moving in the wind, or washing on the clothes line or any
number of objects that move regularly that you don't need to record. This is when you use
your camera's Passive Infrared sensor (PIR sensor), which will detect whether a moving
object is a different temperature to the ambient temperature around.
All Concord cameras include PIR sensors at the front, these sensors detect the infrared
radiation that is emitted from the surfaces in front of them. If an object moves through the
area the sensor is detecting and the temperature of that object is different to the rest of
the area, this will trigger an event. We call this technology Thermal Detect. This means only
warm blooded animals (not reptiles) and vehicles will be detected because their radiated
heat will be different to the surrounding area.