Duct Smoke Detectors
Duct Smoke Detectors that are used with UL555S smoke and combination Fire Smoke Dampers
ACP SM-501-P
Flow Duct Smoke Detector 500 FPM - 4000 FPM
![Flow Duct Smoke Detector 500 FPM - 4000 FPM](https://unitedenertech.com/images/product-photos/_productThumb/SM-501-P.jpg)
Product Overview
The SM-501-P is a 4 wire conventional duct smoke detector that provides early detection of smoke and products of combustion present in air moving through HVAC ducts in Commercial, Industrial, and Residential Applications.