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  • First Alert CO400 Battery Powered Carbon Monoxide Alarm
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First Alert CO400 Battery Powered Carbon Monoxide Alarm

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List Price: $34.99
Price: $17.99 & FREE Shipping on orders over $35. Details
You Save: $17.00 (49%)
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
1-Pack
  • Battery-operated carbon monoxide alarm
  • Uses electrochemical carbon monoxide sensor--the most accurate technology available
  • Simple to use silence/test button, low battery warning, end-of-life timer
  • 1-9V Battery (included) power source. (NOTE: Product may come with 2 AA batteries. This is the same model.)
  • 5 year limited warranty
See more product details
118 new from $9.49 3 used from $9.99

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Frequently Bought Together

First Alert CO400 Battery Powered Carbon Monoxide Alarm + First Alert SA303CN3 Battery Powered Smoke Alarm with Silence Button + First Alert SA710CN Smoke Alarm with Photoelectric Sensor
Price for all three: $35.77

Buy the selected items together


Special Offers and Product Promotions

Size: 1-Pack
  • Buy Used and Save: Buy a Used "First Alert CO400 Battery Powered Carbon Monoxide ..." and save 71% off the $34.99 list price. Buy with confidence as the condition of this item and its timely delivery are guaranteed under the "Amazon A-to-z Guarantee". See all Used offers.
  • Get a $150 Amazon.com Gift Card: Get the Citi ThankYou® Preferred Card and earn a $150.00 digital Amazon.com Gift Card* after $1,000 in card purchases within 3 months of account opening. Learn more.

Product Information

Size Name: 1-Pack
Technical Details
Part Number CO400
Item Weight7.2 ounces
Product Dimensions2.3 x 7.8 x 10 inches
OriginChina
Item model numberCO400
Size1-Pack
ColorWhite
Power Sourcebattery-powered
Item Package Quantity1
CertificationUL2034
Batteries Included?Yes
Batteries Required?No
Warranty Description5-year limited warranty Carbon Monoxide Alarms should be replaced every 5 years.
  
Technical Specification
Additional Information
ASINB000N8OYXI
Best Sellers Rank #1,628 in Home Improvement (See top 100)
Shipping Weight8.8 ounces (View shipping rates and policies)
ShippingThis item is also available for shipping to select countries outside the U.S.
Date First AvailableSeptember 14, 2004
  
Warranty & Support
Warranty, Parts: Parts
Feedback
 

Product Description

Size: 1-Pack

Amazon.com

Carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until its too late. Since symptoms of CO poisoning are like the flu, you might not even know you're in danger at first. That's why a carbon monoxide alarm is an excellent way to protect your family. It can detect the CO you can't see, smell or taste in the air. The First Alert CO400 carbon monoxide alarm uses an electrochemical carbon monoxide sensor-the most accurate technology available. The permanent sensor lasts up to five years. It is powered by on 9V replaceable battery giving you peace of mind even during power outages. The test/silence button both silences the alarm and allows you to test its functionality. The unit monitors and re-alarms if carbon monoxide levels persist sounding a loud 85-decibel horn. No installation is required and the attractive design allows the unit to be placed anywhere you need it. It includes an optional wall mount with no outlet required. An audible and visual low battery signal alerts you to replace the battery. Pull down action chart has convenient guide on what to do if an alarm sounds. 5 year limited warranty. UL listed. --Bree Norlander

From the Manufacturer

First Alert CO400 Battery Powered Carbon Monoxide Alarm

Battery Powered

1-9V Battery (included) power source. (NOTE: Product may come with 2 AA batteries. This is the same model.)

Test/Silence

This alarm comes equipped with a mute button that serves the dual purpose of quickly silencing your alarm as well as testing its function

Electrochemical Sensor

This alarm utilizes an Electrochemical Sensor that allows for optimal efficiency in detecting carbon monoxide

85db Alarm

85db sound output further establishes the ultimate in peace of mind. End of Life Timer also lets you know it's time to replace

Customer Reviews

Very easy to install.
Donald Turos
You never know if you will ever need it so you better get some just in case.
Robert Pleban
The door to the battery compartment did not close.
Larry Iddins

Most Helpful Customer Reviews

128 of 131 people found the following review helpful By M eM on February 26, 2009
Size Name: 1-Pack Verified Purchase
We tested it on the truck's exhaust and it went off at about 60 ppm according to our digital CO Meter.
Which proves it works to Government Standards. This model does what it is supposed to do, the more expensive models just have more features that you probably will not notice on an everyday basis anyway.

This is the least expensive model we have seen that functions, so we hope at this price everyone should have one in their home and garage.

Please replace batteries regularly......
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57 of 63 people found the following review helpful By Rockford Fan on December 19, 2010
Size Name: 1-Pack Verified Purchase
Recently purchased a new furnace. The gas company, furnace sales reps. and the furnace installers all told us carbon monoxide detectors should be located near the furnace and above the vents in bedrooms. Was surprised to read the company insert in this product to say the exact opposite. So surprised: I called them. There are reasons not to locate these where we were told.

Definitely READ the pamphlet.
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63 of 73 people found the following review helpful By A. Kay on March 14, 2008
Size Name: 1-Pack Verified Purchase
We purchased 5 of these; one for each bedroom, the family room, and an elderly neighbor's bedroom. Install was painless. It does, however, need to be mounted on a wall, not a ceiling, so we chose a spot over each bedroom door.

Carbon Monoxide MIXES with the air. It does not stay low or high. You can't see it or smell it. That's why it's so deadly.

The piece of mind of having these installed is enormous. More people die of CO poisoning than from fire. If you don't have a CO detector, get one, two, etc. The price is right.
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23 of 25 people found the following review helpful By Connie on May 26, 2011
Size Name: 1-Pack Verified Purchase
The detector worked well. It arrived quickly and was exactly as advertised.
When testing the product after installation, I would advise a person to put earplugs into their ear canals. The tone is very loud, which is good. However, for testing purposes, please protect delicate hearing.
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54 of 64 people found the following review helpful By Tammy R. Nelson on December 22, 2010
Size Name: 1-Pack Verified Purchase
Bought this in November. Put it up and within days it's "chirping" 3 times per minute which means (according to the device) that it is malfunctioning and needs to be replaced. Amazon was awesome and sent out another one right away. Same exact problem. I'll be returning the second one and choosing another alarm.
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25 of 28 people found the following review helpful By TERESA BURGER on December 23, 2011
Size Name: 3-Pack
I bought one a month ago. And it proved to be very efficient. Ours went off and we first thought the batteries needed to be replaced. But, we replaced the batteries and it went off again. Needless to say, we had someone come over with a detector from the fire department. The readings were very concerning. We had a problem. I truly believe this product saved our lives. Thank you very much. Teresa
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18 of 20 people found the following review helpful By matt151617 on June 30, 2011
Size Name: 1-Pack Verified Purchase
I got one of these for my mom's house. We've had it for 6 years now and only replaced the battery once. We test it usually every few months, and unplug the battery during the non-heating months. We placed it next to a register/vent downstairs. Great price, these things can be very expensive.
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16 of 18 people found the following review helpful By Eric Neff on December 3, 2009
Size Name: 1-Pack Verified Purchase
These seem like nice detectors. I put one on each level for added protection. There are some limitations on placement such as further than 5' from any cooking appliance, 20' from any gas burning appliance, etc. But, after figuring that out, mounting them was easy.
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Most Recent Customer Reviews