The stimulus either generates a frequency consistent with a Doppler shift or infrared energy consistent with the detection parameters of a passive infrared sensor
Pyreos' Gesture and Proximity Sensor capabilities, founded on its passive infrared sensor
technology, are believed to use power of microWatts, and the energy efficiency of these are 'several orders of magnitude' over other rival technologies.
The lighting control components include light sensors, relays, passive infrared sensors
, resistors, switches and more.
Radar, microwave and passive infrared sensors
that offer the advantage of covering a larger area than a typical camera, will also be assessed.
Mr Chimera says they should have taken security further by installing passive infrared sensors
With a longer range than passive infrared sensors
, it covers a wide field of detection, while minimizing the number of false alarms triggered by spiders, small animals, moving shadows and light reflections.
Koova's unique ability to send human face alerts greatly reduces common false alarm triggered by popular passive infrared sensors
and typical audio sensors.
When the infrared radiation that our bodies give off interacts with battery-powered passive infrared sensors
(PIRs), software can communicate to network receivers.
Passive infrared sensors
do not emit infrared light.
Target tracking approach with two passive infrared sensors
suggested in  cannot be used in cases where the distance between the sensors and the target is less than the value determined by the maximum output power of the sensors (saturation limit).
Australia's V-Tol Aerospace produces the i-Gimbal stabilised pay-load which contains an optional CCD television camera, active and passive infrared sensors
, a thermal imaging camera, laser-rangefinders and a laser designator.
The WVC2300 also has two input and two output ports that can be used for connecting the camera to an alarm panel, siren, passive infrared sensors
, smoke detectors, lighting switch or door sensors.--Linksys