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System Sensor

Smoke Detector

Samples air in duct housings

sx7np21.tif System Sensor’s 7251DH intelligent air duct smoke detector combines a high-sensitivity laser sensor with smoke-detection capability. By employing a detector in an air sampling duct housing, the sensing can take place in a controlled manner in the return air stream. When the laser sensor senses sufficient smoke, an alarm signal is initiated at the fire control panel. The product is geared toward facilities with a high number of air changes per hour, where additional smoke detection is recommended for use in the return-air stream.


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