- Inexpensive
- Seven-year lifespan on sensor
- No display
- Not as accurate as some models
- Batteries must be replaced at least yearly
The Kidde KN-COB-B is inexpensive because it lacks a digital display. Bear in mind, though, that most experts prefer CO detectors with digital readouts, which continually display carbon monoxide gas levels in the home and can alert you to borderline levels that may not yet be dangerous. Still, the Kidde KN-COB-B has a green LED that flashes every 30 seconds to indicate that the unit is working properly, a test/reset button and multiple mounting options.
We read several owner-written reviews of the Kidde KN-COB-B at Amazon.com.
| Kidde KN-COB-B-LPM Carbon Monoxide Alarm | |
(9 reviews) In Stock. Eligible for FREE Super Saver Shipping |
|
| Featured Stores | Store Rating | Notes | Total Price | |
|---|---|---|---|---|
 |  483 store reviews | In Stock. | $22.97 | See It |
 | 234 store reviews | In Stock. Fantastic prices with ease & comfort of Amazon.com! | $17.47 | See It |
| See All Stores | ||||
Our Sources
1. Amazon.com
There are only about 10 user reviews here for the basic Kidde Battery Operated Carbon Monoxide Alarm KN-COB-B, but most are positive. One owner reports false alarms.
Review: Kidde KN-COB-B Basic Carbon Monoxide Alarm with Electrochemical Sensor, Contributors to Amazon.com
Carbon Monoxide Detectors Runners Up:
1 pick including: Amazon.com, ConsumerReports.org…
1 pick by top review sites.
Kidde KN-COSM-B Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm
Kidde
New Too low to display
(447)
First Alert CO615 Carbon Monoxide Plug-In Alarm with Battery Backup and Digital Display
First Alert
New $29.99
(359)
Kidde KN-COPP-LPM Battery-Operated Carbon Monoxide Alarm with Digital Display
Kidde
New $23.70
(222)
First Alert CO600 Plug In Carbon Monoxide Alarm
First Alert
New $17.99
(134)
First Alert CO400 Battery Powered Carbon Monoxide Alarm
First Alert
New $15.49
(114)Best Reviewed
Carbon Monoxide Detectors
- Plug-in carbon monoxide detector First Alert CO615 *Est. $35
- Battery-operated carbon monoxide detector Kidde KN-COPP-B *Est. $35
- Interconnecting CO detector/smoke detector First Alert Onelink SCO501CN *Est. $75
- Budget combination alarm Kidde KN-COSM-B *Est. $35
Get info about new reports and updates
