Edwards EST SIGA-OSD Signature Optical Smoke Detector

The Edwards EST SIGA-OSD is a optical (photoelectric) smoke detector for systems that use a Signature loop controller. It uses dual-wavelength, multi-angle sensing to see real smoke while cutting down on unwanted alarms, and it auto-adjusts as the sensing chamber gets dusty with self-checks and maintenance alerts. Sensitivity can be set (including day/night levels), a green/red LED shows status, and the device uses electronic addressing with on-board event memory. It mounts on standard Signature bases and supports optional remote LED and sounder bases. 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 – Low-frequency audible base SIGA-AB4GT – Audible base (temporal pattern capable) SIGA-LED – Remote alarm LED (for use with SB/SB4 bases) SIGA-TS4 – Trim skirt (included with 4″ bases; available separately) SIGA-TS – Trim skirt for non-4″ bases SIGA-DMP – Detector mounting plate