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Ships within 48 hours · Estimated delivery Aug 16 - Aug 21
Installs quickly in standard door cutouts for residential or commercial settings
and primary listening areas
The switch is available in single or double rocker versions with options for neutral or no neutral wiring to fit various installation requirements
Compact & Portable: Slim profile fits easily in a pocket
accurate installation
System Sensor D4120W Brilliant Installs quickly in standard doorSystem Sensor D4120W Watertight 4 Wire Photoelectric Duct Smoke Detector System Sensor D4120W Watertight 4 Wire Photoelectric Duct Smoke Detector is designed for reliable smoke detection in HVAC duct systems exposed to harsh indoor and outdoor environments. Its NEMA 4 rated enclosure and low flow sensing technology ensure accurate performance while simplifying installation, testing, and maintenance. NEMA 4 watertight enclosure rated for protection
