First Alert CO600 Plug-In Carbon Monoxide Alarm

Product Overview

The First Alert CO600 is a plug-in carbon monoxide alarm designed for residential indoor monitoring. It uses an electrochemical sensor to detect elevated concentrations of carbon monoxide, an invisible and odorless gas produced by incomplete combustion. The alarm receives operating power from a standard 120-volt electrical outlet and does not use a battery backup.

When the device detects carbon monoxide at alarm conditions, it produces an audible warning rated at 85 decibels at 10 feet. A single Test/Silence button allows users to check alarm operation and temporarily silence certain alarm conditions. The unit also includes an end-of-life warning that indicates when the complete alarm should be replaced.

The CO600 does not include a digital carbon monoxide concentration display. Its design focuses on basic plug-in operation rather than battery-backed or display-based monitoring. First Alert specifies installation on every level of a home and in sleeping areas, while exact placement should follow the product manual and applicable local requirements. The alarm conforms to the UL 2034 carbon monoxide alarm standard and carries a seven-year limited warranty.

Product Information

Identification

Physical Information

Product Identifier Summary

Model Number

The model number identifies the specific alarm design within the First Alert product family. It is useful when locating manuals, support information, replacement guidance, and technical documentation.

MPN

The Manufacturer Part Number identifies a specific product configuration in manufacturer, distributor, and inventory systems. It can help distinguish the CO600 from other First Alert plug-in alarms.

UPC

The Universal Product Code is a 12-digit barcode identifier commonly used in inventory systems and product databases. It helps distinguish a packaged product from similar models.

EAN

An EAN is an international barcode identifier commonly containing 13 digits. A separate verified EAN for this configuration is not included because it could not be established consistently.

GTIN

The Global Trade Item Number is an international system for identifying commercial products. UPC and EAN identifiers are forms of GTIN used in different barcode formats.

ASIN

The ASIN identifies the specific catalog record used as the initial research source. It helps distinguish this product record from similar First Alert alarm configurations.

ISBN

ISBN identifiers are used for books and certain published materials. They do not apply to this carbon monoxide alarm.

Common Uses

• Carbon monoxide monitoring in residential living spaces
• Monitoring bedrooms and sleeping areas
• Monitoring individual levels of a home
• Use in rooms with an accessible standard electrical outlet
• Supplementing a whole-home carbon monoxide alarm placement plan
• Providing an audible warning when carbon monoxide reaches alarm conditions

Maintenance and Care

The alarm should be tested regularly using its Test/Silence button. First Alert generally recommends testing carbon monoxide alarms at least once each month to confirm that the audible warning system is operating.

Dust and debris should not be allowed to accumulate around the alarm openings. Exterior surfaces and openings can be cleaned carefully according to the manufacturer’s maintenance instructions without introducing liquid into the device.

• Test the alarm monthly.
• Keep openings free from dust and debris.
• Do not paint over the alarm.
• Do not obstruct the sensor openings.
• Keep the device connected to an appropriate electrical outlet during normal use.
• Replace the entire alarm when its end-of-life warning activates.
• Check the installation date periodically so the alarm’s age is known.

Safety Information

Carbon monoxide is a poisonous gas that cannot be identified reliably by sight, smell, or taste. A carbon monoxide alarm is a warning device and does not prevent carbon monoxide from being produced.

• Install and use the alarm according to the manufacturer’s instructions.
• Do not ignore a carbon monoxide alarm signal.
• Move to fresh air when an emergency carbon monoxide alarm occurs and follow emergency procedures.
• Do not cover or block the alarm.
• Do not install the device where environmental conditions fall outside its documented operating limits.
• Do not rely on this plug-in model for monitoring during a power outage because it does not include battery backup.
• Replace an alarm that has reached its end-of-life condition.

The CO600 conforms to the UL 2034 standard for residential carbon monoxide alarms. Local building, fire, rental, or safety codes may establish additional requirements for alarm quantity, placement, power source, or battery backup.

Technical Specifications

Key Features

• Electrochemical carbon monoxide sensing technology
• Direct plug-in electrical operation
• 85-decibel audible alarm
• Combined Test/Silence control
• End-of-life replacement warning
• Compact single-purpose design
• No routine battery replacement
• UL 2034 conformity
• Seven-year limited warranty

Package Contents

• First Alert CO600 Plug-In Carbon Monoxide Alarm
• Product instructions or user documentation

This model does not require replaceable batteries for normal operation. Package configurations may vary by production period or distribution channel, so undocumented accessories are not included here.

Compatibility

Electrical Compatibility

The CO600 is designed for plug-in operation using a standard 120-volt household electrical outlet. It is not intended to function as a battery-operated portable alarm.

Residential Placement

The alarm can be used in suitable residential areas where an appropriate electrical outlet is available. First Alert advises installing carbon monoxide alarms on every level of a home and in sleeping areas while following model-specific placement instructions.

Interconnection

The CO600 is a standalone alarm. It is not identified as a hardwired interconnected alarm that triggers other household alarms through an interconnect circuit.

Power Outages

This configuration does not have battery backup. Carbon monoxide monitoring therefore stops when electrical power to the outlet is unavailable.

Frequently Asked Questions

What does the First Alert CO600 detect?

It detects carbon monoxide gas and produces an audible warning when monitored conditions meet the alarm criteria built into the device.

Does the CO600 detect smoke?

No. It is a carbon monoxide alarm rather than a combination smoke and carbon monoxide alarm. Separate smoke detection is required where applicable.

Does the CO600 detect natural gas?

No. The electrochemical sensor is designed for carbon monoxide detection. It should not be treated as a combustible-gas or natural-gas detector.

Does the CO600 have a battery backup?

No. This version relies on electrical outlet power and does not provide continued monitoring when power to the outlet is lost.

Does the CO600 require batteries?

No replaceable battery is required for normal operation. The device receives its operating power directly from the electrical outlet.

Does it show the carbon monoxide level on a screen?

No. The CO600 is not a digital-display model. Users seeking a numerical CO concentration display should distinguish it from First Alert models equipped with digital readouts.

How is the CO600 installed?

Installation consists primarily of selecting an appropriate location and plugging the alarm into a compatible household outlet. Placement should follow the product manual and applicable local safety codes.

How high should a carbon monoxide alarm be installed?

Carbon monoxide mixes with room air rather than simply collecting at the ceiling or floor. Placement should therefore follow the manufacturer’s model-specific instructions instead of relying on a general assumption about gas height.

Can it be installed in a bedroom?

Carbon monoxide alarms are commonly installed in sleeping areas. The selected outlet location should comply with the manufacturer’s placement restrictions and remain unobstructed.

Can it be used in a garage?

Installation locations must meet the environmental and placement conditions specified in the user manual. Areas subject to vehicle exhaust, extreme temperatures, humidity, or other unsuitable conditions require particular care.

Can the CO600 be used during a power outage?

No. Because the CO600 does not have battery backup, it cannot continue normal monitoring when power to the electrical outlet is unavailable.

How often should the alarm be tested?

Regular testing is part of routine alarm maintenance. First Alert recommends testing carbon monoxide alarms monthly and following the instructions supplied with the specific model.

What does the Test/Silence button do?

The control allows the user to test the alarm circuitry and audible warning. It can also temporarily silence applicable alarm conditions according to the operating instructions.

What does the end-of-life warning mean?

An end-of-life warning means the carbon monoxide alarm has reached the point at which the complete unit should be replaced. It is not corrected by replacing a battery because this model does not use a replaceable backup battery.

Can the carbon monoxide sensor be replaced separately?

The alarm is intended to be replaced as a complete unit when it reaches the end of its service life. The sensing element is not treated as a routine user-replaceable component.

How should the CO600 be cleaned?

Dust should be removed carefully from the exterior and alarm openings while avoiding liquids, paint, solvents, or other materials that could interfere with the sensor or air openings.

Does the CO600 connect to Wi-Fi?

No Wi-Fi or app connectivity is documented for this model. It operates as a standalone audible carbon monoxide alarm.

Does it interconnect with other First Alert alarms?

The CO600 is not documented as a hardwired interconnected model. It should not be assumed to trigger other alarms elsewhere in a building.

What should be done if the carbon monoxide alarm sounds?

An emergency carbon monoxide signal should be taken seriously. Occupants should move to fresh air and follow the emergency instructions supplied with the alarm and guidance from appropriate emergency authorities.

How can I identify the CO600?

The model designation can be checked on the product labeling and compared with the identification information in the user manual. This helps distinguish it from models with battery backup, digital displays, or different power arrangements.

What warranty applies to the CO600?

First Alert documents a seven-year limited warranty for the CO600. Coverage remains subject to the manufacturer’s warranty conditions and the status of the individual product.

Buying Considerations

The most important configuration difference is the absence of battery backup. A loss of household electricity also removes power from the CO600, so this model differs from dual-power plug-in alarms that continue monitoring during an outage.

The CO600 also does not provide a numerical carbon monoxide display. Users researching First Alert models should distinguish basic audible alarms from versions that display measured CO information.

Outlet availability and placement should be considered because this alarm operates directly from a wall receptacle. The selected outlet should allow suitable positioning without obstructing the alarm or placing it in a location excluded by the installation manual.

Carbon monoxide alarms have finite service lives. The manufacturing or replacement date of an existing unit should be checked rather than assuming that an older alarm remains suitable simply because its test horn still sounds.

Customer Feedback Summary

This section is a generalized summary of recurring themes reported in publicly available customer feedback. These observations describe user experiences and are not verified technical specifications.

Positive feedback commonly describes the CO600 as straightforward to install because it plugs directly into a household outlet. Users also frequently mention the simple Test/Silence control and the absence of routine battery replacement as convenient aspects of the design.

The audible alarm volume is generally regarded as noticeable, which is consistent with the device’s intended warning function. Some owners also value the compact standalone design when they do not require a display or interconnected alarm system.

Commonly reported limitations reflect the model’s basic configuration. Users sometimes prefer a unit with battery backup for continued operation during power outages, while others want a digital display that shows measured carbon monoxide levels. Outlet orientation and available receptacle locations can also affect where a plug-in alarm can be positioned.

Customer experiences vary according to installation location, building layout, electrical reliability, unit age, and individual expectations. These recurring observations should not be interpreted as guaranteed performance characteristics for every unit.

Related Products

• First Alert CO400: Battery-operated carbon monoxide alarm intended for locations where plug-in operation is not required.
• First Alert CO605: Plug-in carbon monoxide alarm configuration with battery-backup capability.
• First Alert CO606: Plug-in carbon monoxide alarm designed to continue monitoring through a backup power source.
• First Alert CO615: Plug-in carbon monoxide alarm family with battery backup and a digital display.
• First Alert Combination Smoke and CO Alarms: Devices that combine smoke and carbon monoxide sensing within one alarm housing.

Last Updated

August 8, 2026