Smoke & CO Detectors

Hardwired smoke detector with battery backup – BRK 9120B replacement model - Available at Electrical Marketplace

Hardwired Smoke Detector with Battery Backup | 120V | AC Interconnectable Alarm | First Alert SMI100-AC

SKU: SMI100-AC

$16.95

Hardwired smoke and carbon monoxide detector with battery backup and silence button - Available at Electrical Marketplace

Hardwired Smoke and Carbon Monoxide Detector with Battery Backup | 120V AC Interconnectable Alarm

SKU: SMICO100-AC

$65.95

BRK SMI105-AC Hardwired Ionization Smoke Alarm | Featuring a 10-Year Lithium Battery Backup

SKU: SMI105

$29.95

BRK SMICO105-AC Hardwired Smoke and Carbon Monoxide Alarm with 10-Year Sealed Battery Backup – Dual Sensor Combo Alarm - Available at Electrical Marketplace

BRK SMICO105-AC Smoke & Carbon Monoxide Detector | Hardwired with 10-Year Lithium Battery Backup

SKU: SMICO105

$79.95

About Smoke & CO Detectors

Protect lives and property with our reliable Smoke and Carbon Monoxide Detectors. At Electrical Marketplace, we offer a wide range of UL-listed, code-compliant alarms designed for residential, commercial, and industrial use.

Choose from battery-powered, hardwired, or dual-sensor combination units that detect smoke and CO with advanced features like voice alerts, test/reset buttons, and interconnect capabilities. Whether you're updating a single home or outfitting a multi-unit facility, our detectors provide early warning and peace of mind.

Shop now and stay protected with fast, nationwide shipping.