Edwards EST SIGA-OSHD Smoke and Heat Detector

The Edwards EST SIGA-OSHD is an intelligent addressable smoke and heat multisensor for Signature Series loops. It pairs optical smoke sensing with rate-of-rise heat plus a fixed 135 °F threshold to cover slow smoldering and fast flaming fires. Digital filtering, environmental compensation, and a green or red status LED support dependable performance with fewer unwanted alarms. Key Specifications: Type: Intelligent addressable smoke and heat multisensor Core Function(s): Optical smoke detection with nuisance-alarm reduction; rate-of-rise heat 15 °F per minute with fixed 135 °F Loop/Protocol: Signature Series SLC Power: 15.20 to 19.95 VDC Indicators/UI: Bi-color status LED Operating Range: 32 to 100 °F; 0 to 93 percent RH, non-condensing Notes: Five sensitivity settings with day or night options and 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 and SB4 bases SIGA-TS4 – Trim skirt for 4-inch bases System Compatibility: Signature Series control panels using a Signature loop controller.