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

See All Carbon Monoxide Detectors

Kidde KN-COB-B

*Est. $15

Reviewed

January 2009

Pros

Inexpensive
Seven-year lifespan on sensor

Cons

No display
Not as accurate as some models
Batteries must be replaced at least yearly

Where to Buy

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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.

Where To Buy

Kidde KN-COPP-B-LPM Battery-Operated Carbon Monoxide Alarm with Digital Display

(9 reviews)
Buy new: $54.49 $28.09 10 New from $23.36

In Stock. Eligible for FREE Super Saver Shipping

Store Rating	Notes	Total Price
1,219 store reviews	In Stock. Earn 2% eBay Bucks on qualifying purchases! Backed by eBay Buyer Protection Program. Terms and Conditions apply.	$52.55	See It
4,536 store reviews	Sorry, not in stock	$18.87	See It
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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

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Kidde KN-COB-B Review

Kidde KN-COB-B