Edwards Signaling E-PD Intelligent Analog Optical Smoke Detector

This intelligent analog device uses an optical sensing chamber to detect smoke. The detector analyzes sensitivity reference values gathered by the sensor to determine when an alarm is initiated. The E-PD is capable of performing comprehensive self-diagnostics and storing the data.

The detector continuously adjusts its sensitivity reference value based on fluctuating environmental conditions such as the presence of dirt, humidity, or changes in temperature. When the detector approaches its preset sensitivity reference value threshold, it issues a dirty sensor warning, allowing enough of a margin for maintenance personnel to replace the optical chamber before it goes into trouble condition.

Thanks to its high-performance optical sensing chamber, the E-PD responds quickly and reliably to a wide range of fire types, especially slow burning fires fueled by combustibles typically found in modern multi-use buildings. The E-PD detects extremely small particles and triggers an alarm at the first sign of smoke.