System Sensor 2151 Smoke Detector Els PW 17895 Direct Cross-Reference: Engineered as the

Direct Cross-Reference: Engineered as the official successor to D9817302 to ensure seamless backward compatibility

maintaining stable resistance and reliable performance in demanding residential HVAC applications

this SWT1276 thermal switch offers the repeatability required to restore safe furnace operation without the nuisance tripping seen in lower-quality aftermarket alternatives

Corrosion-Resistant Hardware: Built to resist oxidation and scale buildup

Easy Readability: Features a 3

System Sensor 2151 Smoke Detector Els PW 17895 Direct Cross-Reference: Engineered as theThe System Sensor 2151 is a professional grade, low profile photoelectric smoke detector designed for precise performance in commercial HVAC and fire alarm systems. This 100 Series plug in head utilizes a state of the art optical sensing chamber and is engineered to provide stable detection in diverse environments. Technicians should note that this unit is the direct replacement for 2151+ and the 70 540000 001 models, ensuring seamless integration