Aaon Inc R77340 Smoke Detector AD4S

The Aaon Inc. R77340 Smoke Detector AD4S operates by utilizing an advanced photoelectric sensor to monitor light scattering within a specialized sensing chamber. When airborne combustion particles enter this internal space, the light beam reflects onto a sensitive receiver, triggering an immediate signal to the integrated building management system. This unit installs directly onto the return air ductwork of a compatible system to monitor airflow for potential hazards. The part features a clear plastic housing for visual inspection and utilizes a modular plug-in design for streamlined electrical connections without requiring specialized external parts during the mounting process.