Edwards EST SIGA-OSD Optical Smoke Detector

The Edwards EST SIGA-OSD is an intelligent optical smoke detector for Signature Series loops. It uses dual-wavelength, multi-angle sensing with digital filtering to help distinguish real smoke from nuisance sources, and it supports environmental compensation, self-diagnostics, and a clear green/red status LED. Key Specifications: Type: Intelligent addressable optical smoke detector Core Function(s): Photoelectric smoke detection with integrated nuisance-alarm reduction Loop/Protocol: Signature Series SLC Power: 15.20 to 19.95 VDC Indicators/UI: Bi-color status LED Operating Range: 32 to 120 °F; 0 to 93% RH, non-condensing Notes: Five sensitivity settings with day/night and pre-alarm options; dirty detector warnings Compatible Bases & Accessories: SIGA-SB – Standard base SIGA-SB4 – 4-inch standard base with trim skirt SIGA-RB – Relay base SIGA-RB4 – 4-inch relay base with trim skirt SIGA-IB – Fault isolator base SIGA-IB4 – 4-inch fault isolator base with trim skirt SIGA-AB4G – Audible sounder base SIGA-AB4G-LF – 520 Hz low-frequency sounder base SIGA-AB4GT – Audible sounder base SIGA-LED – Remote alarm LED for SB/SB4 bases SIGA-TS4 – Trim skirt for 4-inch bases System Compatibility: Signature Series control panels using a Signature loop controller.