Gentex SR Multi-Criteria Smoke Alarm with Relay combines photoelectric multi-criteria sensing with a hardwired 120VAC power source and 9V battery backup for dependable smoke detection in residential and commercial dwelling applications. Its integrated Form A and Form C relay contacts, tandem interconnect capability, and nuisance-alarm resistant sensing provide flexible integration with auxiliary life safety and building systems.

• Multi-Criteria Smoke Detection — Uses photoelectric light-scattering technology with nominal 2.5% sensitivity and UL 217 9th Edition compliance to provide reliable detection while helping reduce nuisance alarms from cooking and other non-fire conditions.
• Integrated Form A/C Relay — Provides one Form A and one Form C dry contact set rated at 1A at 120VAC or 30VDC, with programmable relay operation for local alarm or interconnected alarm activation and battery-backed relay functionality.
• 120VAC Power with Backup — Operates from 120VAC, 60Hz with a 9V alkaline battery backup to maintain protection during building power loss, while supporting tandem interconnection with up to 12 Gentex smoke alarms and 6 accessory devices.
• Audible & Diagnostic Features — Delivers an 85 dBA Temporal 3 evacuation signal with a 3100Hz horn, plus a 10-year end-of-life indicator, 8-hour alarm memory, self-test and functional-test buttons, and low or missing battery notification.
• Installation-Ready Design — Includes a quick-disconnect wiring harness, junction-box compatible mounting hardware, insect-screened sensing chamber, contamination-prevention dust cover, pulsing LED indicator, and non-latching self-restoring alarm operation.

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