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First Alert CO400 Battery Powered Carbon Monoxide Alarm

4.3 out of 5 stars 690 customer reviews
| 42 answered questions

Price: $14.19 ($1.09 / Piece) & FREE Shipping on orders over $49. Details
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Ships from and sold by Amazon.com. Gift-wrap available.
1-Pack
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  • 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
75 new from $14.19
$14.19 ($1.09 / Piece) & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

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Size: 1-Pack

Product Description

Size: 1-Pack

Product Description

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.

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

Product Information

Size:1-Pack

Technical Details

Part Number CO400
Item Weight 10.4 ounces
Product Dimensions 3.3 x 9 x 6 inches
Item model number CO400
Size 1-Pack
Color White
Material computer
Power Source battery-powered
Item Package Quantity 1
Number Of Pieces 1
Certification UL2034
Included Components Alarm, Manuel, Battery
Batteries Included? Yes
Batteries Required? Yes
Battery Cell Type Alkaline
Warranty Description » 7-Years Limited Warranty

Technical Specification

Additional Information

ASIN B000N8OYXI
Customer Reviews
4.3 out of 5 stars 690 customer reviews

4.3 out of 5 stars
Best Sellers Rank #373 in Home Improvements (See top 100)
#3 in Home Improvement > Safety & Security > Fire Safety > Carbon Monoxide Detectors
#8 in Home Improvement > Safety & Security > Household Sensors & Alarms
#37 in Home Improvement > Contractor Supply
Shipping Weight 8 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available September 14, 2004

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From the Manufacturer


Customer Questions & Answers

Customer Reviews

Top Customer Reviews

Size: 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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Size: 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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Size: 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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Size: 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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Size: 1-Pack Verified Purchase
I would have given this good reviews, because it is easy to use and I think would probably work correctly, but after having it only a couple of months one unit already started beeping with the ERR code. That code means end of life. The units say they have a 7 year life after start of use. Well, 2 months is far from 7 years, but I checked the manufacture date and it was made in October of 2006, so Amazon is selling 10 year old detectors. and apparently manufacture date does matter, not just start of use.
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Size: 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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Size: 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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Size: 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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