First Alert SCO5CN Battery Operated Combination Carbon Monoxide/Smoke Alarm

Since introducing the first domestic smoke alarm in 1958, First Alert has been the most reliable name in home safety (Based on a First Alert Brand Trust Survey in February 2018)

Use this battery-operated smoke and carbon monoxide detector to protect your loved ones; With battery-operated CO alarms, you can keep tabs on the gas even if the power goes out.

First Alert SCO5CN Battery Operated Combination Carbon Monoxide/Smoke Alarm

Includes both a photoelectric sensor for detecting smoke and flames and an electrochemical carbon monoxide sensor.

An 85 decibel siren sounds a clear, loud warning upon detection, and indicator lights on the front of the unit show whether or not smoke or carbon monoxide is present.

The battery-powered device requires no electrician for installation and can be set up in minutes. Silences the low battery warning for up to 8 hours.

The alarm is easy to use, with just a test/silence button, and the EZ access battery drawer means that batteries can be swapped out without having to take the device down from the ceiling.

Combination Smoke and Carbon Monoxide Alarm

First Alert Smoke/CO Detector First Alert Smoldering flames can be detected quite effectively by combined smoke and carbon monoxide alarms.

This alarm is able to distinguish between smoke that poses no danger and that which could cause death thanks to recent technological advances.

Having Photoelectric Smoke Sensing Technology in the wild will significantly cut down on the number of false alarms caused by things like cooking smoke and steam from the shower.

The alarm’s Mute Button can be used for both checking its functionality and immediately turning off the alarm.

It Utilizes an Electrochemical Sensor

Smoke and CO alarms that work together use an Electrochemical Sensor to detect carbon monoxide as effectively and efficiently as possible.

As an added convenience, this alarm features an easy-access battery door that eliminates the need to retrieve the device from the ceiling in order to swap out its power source.

The unit’s 85db sound output and End of Life Timer provide comfort, and the presence of Dual Smoke and Carbon Monoxide Sensing almost ensures your safety.

This alarm is UL217 and UL2034 compliant and comes with a 7-year limited warranty.


It’s Time for the First Warning Using its dual permanent sensors, the SCO5CN Combination Smoke and Carbon Monoxide Alarm can detect both smoke and carbon monoxide.

The battery-powered carbon monoxide and smoke detector requires no wiring or professional installation.

Smoke from smouldering fires can be detected using a photoelectric sensor while false alarms from other sources, such as cooking smoke or steam, are kept to a minimum.

Carbon monoxide leaks can be caused by a number of different things, including broken fuel-burning appliances, blocked chimneys, and generators operating indoors or at too high of a volume.