Edwards SIGA-PD Intelligent Photoelectric Sensor Head Detector Fire Accessory

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.