SIGA-PHD

The Edwards SIGA-PHD is an intelligent multisensor smoke and heat detector from the Signature Series, combining photoelectric smoke sensing with rate-of-rise heat detection for comprehensive fire coverage.
It features advanced onboard microprocessor analysis that processes dual sensor data with digital filtering to eliminate nuisance alarms while providing early detection of both smoldering and fast-flaming fires through Signature Loop integration.
Key Specifications
Feature
Specification
Display
Dual-color LED (Green: Normal / Red: Alarm)
Sensing Method
Photoelectric smoke + Rate-of-rise heat
Smoke Sensitivity
0.53-3.94%/ft. (1.7-12.35%/m)
Heat Detection
15°F/min (8°C/min) rate-of-rise, 135°F (57°C) fixed
Device Capacity
Up to 250 addresses per Signature Loop
Communication
Signature Data Circuit (SLC)
Standard Functions
Self-diagnostics, 20 pre-alarm settings, 5 sensitivity levels, Environmental compensation
Mounting Bases
Standard, Relay, Fault Isolator, Audible
Aux Input
Dual sensor environmental compensation
Power Supply
15.2–19.95 VDC (loop-powered)
Operating Temp
0°C–38°C (32°F–100°F, 0-93% RH non-condensing)