Price: $69.99
(as of Apr 08, 2025 14:50:21 UTC – Details)

The First Alert SC9120A hardwired combination ionization smoke and carbon monoxide alarm delivers both smoke and carbon monoxide detection in a single unit. This 120-Volt AC smoke detector uses an ionization smoke sensor to reliably detect smoke from hot, fast-flaming fires. It also features an advanced electrochemical sensor that detects carbon monoxide leaks from multiple sources such as faulty fuel-burning appliances and blocked chimneys. If a threat is detected, the alarm sounds a loud siren that helps alert you to Danger. Designed to be hardwired directly into the electrical system of your home or facility, a universal mounting bracket makes installation easy and helps hide drywall cutouts, while tamper-resistant locking pins keep the alarm secure. And thanks to the convenient test/silence button, you can easily check whether the alarm is functioning properly and mute false alarms. This smoke and carbon monoxide alarm can integrate with up to 12 other First Alert or BRK hardwired alarms and features a latching indicator that identifies which unit triggered the alarm. Ideal for coverage of larger areas, the SC9120A smoke and co combination alarm can help you protect your entire home or facility from carbon monoxide leaks and fires.
120-Volt hardwired smoke and carbon monoxide alarms wire directly into your electrical system
Ionization smoke Sensor reliably detects particles from fast-flaming fires
Electrochemical Sensor accurately detects carbon monoxide
Each alarm can integrate with up to 18 compatible devices for extended coverage

Customers say

Customers are satisfied with the product’s functionality, ease of installation, and value for money. They find it works well and comes with good instructions. Many consider it a good purchase and a replacement value. However, opinions differ on the battery backup and wiring.

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