First Alert CO600 Plug-In Carbon Monoxide Alarm
- Power Source: Corded Electric
- Sensor Type: Electrochemical
- Alarm: Audible
- Operating Humidity: 10-95% RH
Last refreshed Sep 8, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A no-frills plug-in CO alarm that does the core job at a lower price than First Alert's display and battery-backup models.
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ASIN: B000FDLFLKModel: CO600Category: Carbon Monoxide Detectors
Overview
A plug-in carbon monoxide alarm that runs from any standard 120V outlet, using an electrochemical CO sensor and an 85 decibel alarm. Basic single-hazard protection with a 7 year limited warranty and an end of life chirp.
The CO600 is First Alert's simplest plug-in model: no digital display, no gas detection beyond CO, no battery backup. That's the trade-off for a lower cost per outlet when covering several rooms, since First Alert recommends one unit per floor and one per bedroom.
- Plug-in electrochemical CO sensor
- 85 decibel alarm
- 7 year limited warranty
- End of life signal chirp
Who it's for
Homeowners who want straightforward CO coverage on every floor and in every bedroom without paying for a display or gas-detection extras. Not for anyone who needs coverage to continue through a power outage.
Pros and cons
- Plugs into any standard outlet with no wiring
- 85 decibel alarm is loud enough to wake a sleeper
- End of life chirp flags replacement timing
- Low cost makes multi-room coverage affordable
- No battery backup, so it stops monitoring in a power outage
- No digital display of CO levels
- No secondary gas detection
Performance notes
The electrochemical sensor reads CO concentration continuously while plugged in and trips the 85 decibel alarm once levels reach a dangerous threshold. A single button silences nuisance alarms and tests the unit, and an end of life chirp signals when the 7 year sensor life is up, so replacement timing isn't guesswork.
Specifications
| Brand | First Alert |
|---|---|
| Model | CO600 |
| Dimensions & fit | |
| Item Dimensions D X W X H | 2.8 × 8.5 × 6.7 inches |
| Power & efficiency | |
| Power Source | Corded Electric |
| Construction & materials | |
| Enclosure Material | Computer |
| Color | White |
| Included components | |
| Unit Count | 1 |
| Other details | |
| Sensor Type | Electrochemical |
| Alarm | Audible |
| Operating Humidity | 10-95% RH |
| Number Of Items | 1 |
| Product Style | Plug In Alarm |
| Mfr Part Number | CO600 |
| Builtin Media | First Alert Co600 Carbon Monoxide Plug-In Alarm (no Backup Or Display) |
| Item Type Name | First Alert Security; System Carbon Monoxide Plug-In Alarm, (CO600) |
| Item Highlight | CO600 |
Frequently asked questions
Does the First Alert CO600 have a battery backup?
No. It runs only on the outlet it's plugged into, so it stops monitoring during a power outage.
How long does the sensor last?
First Alert rates it for 7 years, with an end of life chirp to signal when it needs replacing.
How many should I install?
First Alert recommends one CO600 on each level of the home and one in each bedroom.