Description The Signature Series SIGA-PD optical smoke detector brings advanced sensing technology to a practical design that increases efficiency, saves installation time, cuts costs, and extends life safety and property protection capabilities. Continuous self-diagnostics ensure reliability over the long-haul, while environmental compensation helps reduce maintenance costs. Like all Signature Series detectors, the SIGA-PD is an intelligent device that gathers analog information from its optical sensor, converting this data into digital signals. To make an alarm decision, the detector’s on-board microprocessor measures and analyzes sensor readings and compares this information to historical data. Digital filters remove signal patterns that are not typical of fires, thus virtually eliminating unwanted alarms Features Note: Some features described here may not be supported by all control systems. • Next Generation Optical Smoke Sensing Technology • Wide 0.53 to 3.94 %/ft. (1.7 to 12.35 %/m) smoke obscuration • Uses Existing Wiring • Automatic Device Mapping • Up To 250 Total Signature Addresses Per Loop • Two Levels of Environmental Compensation • Two Levels of Dirty Detector Warning • Twenty Pre-Alarm Settings • Five Sensitivity Settings • Non-Volatile Memory • Electronic Addressing • Identification of Dirty or Defective Detectors • Automatic Day/Night Sensitivity Adjustment • Bicolor (Green/Red) Status Led • Standard, Relay, Fault Isolator, and Audible Mounting Bases • Sensor Markings Provide Easy Testing Identification