D323A DH Analog Duct Smoke Detector Replacement Head

The D323ADH Analog Photoelectric Smoke Detector Replacement Head is a replacement head for the D331A and D332A Analog Duct Smoke Detectors. It detects the large smoke particles which typically result from wood, paper, and fabric combustion. Use it in heating, ventilation, and air conditioning (HVAC) ducts. It uses an LED and photodiode to measure particulate levels in its detection chamber. ...

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