Any object or person naturally emits radiation in the infrared range, which is the ordinary heat radiated by each element.
The main difference with the active infrared lies in the fact that the radiation is not stimulated but naturally emitted.
A passive infrared sensor detects movements by the temperatures’ variation in the detection field.
A Doppler microwave sensor combines the transmitter and receiver operations in a single antenna.
The signal is reflected by the environment of the sensor and picked up by the receiver. Movement in the detection zone modifies the reflected signal. The modification is analyzed and compared to the original signal.
Both technologies are sensitive to different phenomenon. Passive infrared is responsive to heat movements, and microwave to water (rain, streaming….) or other objects in movement. The combination of the two technologies results in increased reliability of the system.
KAPIRIS» Dual technology
» No dead zone at the foot of the detector
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KAPIRIS is designed to protect sensitive zones where the installation of technologies such as infrared barriers are difficult. KAPIRIS is efficient in highly variable elevation levels lands, in cabling difficulties site, against irremovable scene elements, etc…
KAPIRIS was specifically developed for long-range detection and integrates a Doppler K band microwave antenna (24 GHz) and a passive infrared sensor.
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