SENSORS


Microwave Motion Technology


Another sensor technology uses microwave technology to determine when an object moves in relation to a fixed background.


The sensor uses the Doppler effect to sense a change in the frequency of a low-power microwave signal. As an object moves toward the sensor, the reflected frequency increases. As an object moves away from the sensor, the reflected frequency decreases. By comparing these characteristics with the frequency being transmitted, the detector can accurately sense an object as it moves through the protected area.


When the detector senses motion in the protected area, its relay output changes the state of a zone input on the system. The control panel responds to this change according to its program.


Honeywell’s precise K-Band technology: This unique, innovative microwave technology allows our engineers to design a source in such a way as to provide a crisp pattern with no dead spaces. The pattern wave is so precise that it is less likely to activate when objects outside of the protected room move, such as in the case with store-front display windows or multi-tenant office complexes.


DUAL TEC®


Motion Technology


In an attempt to validate the motion sensed by a single sensor, the DUAL TEC Motion Detector uses both PIR and Microwave technologies to determine if there is motion within a protected area.


The major advantage of using DUAL TEC technology is the built-in validation of motion within the protected area. Since both sensors must detect motion, but both sense very different ways, it is like getting an immediate “second opinion” before alarm activation. This helps to minimize false activations caused by environmental changes, small animals and other unexpected conditions.


In some cases, the unit can conserve power by allowing the PIR to remain active while allowing the microwave sensor to sleep. If the PIR senses motion, the microwave sensor activates and verifies the motion. If there is no motion sensed, the detector does not change the state of its alarm output.


When the detector senses motion from the PIR and microwave sensors in the protected area, its relay output changes the state of a zone input on the system. The control panel responds to these changes according to its program.


Call 1-800-467-5875 for more information.


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