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MK Sensors
PIR Passive Infrared
Passive infrared operates by detecting
changes in temperature within a cone-shaped
area around the detector.
Changes in temperature within the detection
area are recognised as occupancy signals.
When someone enters the room, their body
heat is detected and the lights are switched
on.
Lights are kept on for as long as someone
remains in the area.
When the last person leaves the area and
there is no longer any body heat to detect, the
switch-off timer is activated.
If no-one re-enters the room within this period
(set to 20 minutes in this example), the lights
switch off.
Lights remain off until someone re-enters the
monitored area.
Automatically switch or dim lighting based on presence and daylight levels.
Passive infrared
provides simple,
cost effective
presence detection
for lighting.