or
Sign in to turn on 1-Click ordering.
or
Amazon Prime Free Trial required. Sign up when you check out. Learn More
More Buying Choices
King's Ransom Collectibles Add to Cart
$16.99  & eligible for FREE Super Saver Shipping on orders over $25. Details
Triplenet Pricing Add to Cart
$15.99 + $4.01 shipping
Grady's Online Add to Cart
$17.00 + $3.52 shipping
Have one to sell? Sell yours here
First Alert CO400 Battery Powered Carbon Monoxide Alarm
 
See larger image and other views
 

First Alert CO400 Battery Powered Carbon Monoxide Alarm

by First Alert
3.8 out of 5 stars  See all reviews (67 customer reviews)


List Price: $34.99
Price: $16.48 & eligible for FREE Super Saver Shipping on orders over $25. Details
You Save: $18.51 (53%)
o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o o
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
Want it delivered Friday, May 18? Choose One-Day Shipping at checkout. Details
Have Questions About Buying a Smoke or Carbon Monoxide Detector? Check out our Smoke and Carbon Monoxide Detectors Guide for help choosing the right alarm to protect your family. Learn more

Frequently Bought Together

First Alert CO400 Battery Powered Carbon Monoxide Alarm + Kidde i9040 Fire Sentry Battery-Operated Ionization Sensor Compact Smoke and Fire Alarm + First Alert CO600 Plug In Carbon Monoxide Alarm
Price For All Three: $42.23

Show availability and shipping details

Buy the selected items together
  • In Stock.
    Ships from and sold by Amazon.com.
    Eligible for FREE Super Saver Shipping on orders over $25. Details

  • Kidde i9040 Fire Sentry Battery-Operated Ionization Sensor Compact Smoke and Fire Alarm $7.25

    In Stock.
    Ships from and sold by Amazon.com.
    Eligible for FREE Super Saver Shipping on orders over $25. Details

  • First Alert CO600 Plug In Carbon Monoxide Alarm $18.50 ($18.50 / 1)

    In Stock.
    Ships from and sold by Amazon.com.
    Eligible for FREE Super Saver Shipping on orders over $25. Details



Product Specifications
Part Number CO400
Size1-Pack
ColorWhite
MaterialPlastic
Item Package Quantity1
Item Dimensions
Weight9.60 Ounces
Length7.10 inches
Width6.40 inches
Height10.60 inches

Product Features

  • 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
  • 2 AA batteries included
  • 5 year limited warranty

Product Description

Amazon.com Product Description

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 two AA replaceable alkaline batteries 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

What's in the Box
One carbon monoxide alarm, user's manual, and two AA batteries

Amazon.com


Know about Carbon Monoxide (CO)

First Alert CO Alarm Features
  • AC/DC Plug-in with Battery Backup and Digital Display of CO Concentration
  • AC/DC Plug-in with Battery Backup
  • AC/DC Plug-in
  • Battery Powered
  • Combination Smoke and CO Alarms
  • Combination Natural Gas, Propane Gas & CO Gas Alarm

What should you do when a CO alarm sounds?

  1. Operate the Test/Silence button.
  2. Call your emergency services, fire department or 911.
  3. Immediately move to fresh air—outdoors or by an open door or window. Do a head count to check that all persons are accounted for. Do not reenter the premises, or move away from the open door or window until the emergency services responder has arrived, the premises have been aired out, and your CO Alarm remains in its normal condition.
  4. After following steps 1-3, if your CO Alarm reactivates within a 24-hour period, repeat steps 1-3 and call a qualified appliance technician to investigate for sources of CO from fuel-burning equipment and appliances, and inspect for proper operation of this equipment. If problems are identified during this inspection have the equipment serviced immediately.
  5. Note any combustion equipment not inspected by the technician, and consult the manufacturers’ instructions, or contact the manufacturers directly, for more information about CO safety and this equipment. Make sure that motor vehicles are not, and have not, been operating in an attached garage or adjacent to the residence.

*Per ANSI/UL 2034

Disaster Preparedness and Carbon Monoxide Poisoning
At the onset of hurricane season, it’s important for consumers to remember the proper safety precautions to take in the event of a power outage, as several dangers – including accidental carbon monoxide (CO) poisoning – arise when electricity is lost.

During power outages, many consumers turn to various sources of alternative power and cooking as a temporary solution.  From gas-powered generators to gas grills to wood and charcoal, households look for ways to continue their daily lives during a loss of power.  Unfortunately, the incorrect use of many of these products can result in tragic consequences.  For example, the Consumer Product Safety Commission reports that more than 28 people died from accidental CO poisoning during the 2005 hurricane season as a direct result of portable generator use. The following safety tips will help families avoid CO and other dangers associated with power outages:

  • Never run a generator indoors or in a poorly ventilated area such as a garage, basement or porch, and use the appropriate-size power cords to carry the electric load. 
  • Install a minimum of one battery-operated CO alarm (or AC-powered alarm with battery backup) outside each sleeping area, and for maximum protection install at least one CO alarm on each level of the home.
  • Ensure that CO alarms have working batteries installed.
  • Never burn charcoal or other outdoor cooking appliances indoors or in the garage.

Extra Guidelines to Help Prevent Carbon Monoxide (CO) Poisoning
A national survey reveals nearly three quarters of Americans think carbon monoxide (CO) can be “very dangerous” in the home, and their fears are warranted. CO is the leading cause of accidental poisoning in the United States, according to the Journal of the American Medical Association.

Often referred to as the silent killer because one can’t see, smell or taste it, CO is a by-product of combustion produced by anything that burns fuel, such as gas furnaces, water heaters, barbeque grills, wood-burning fireplaces, stoves, alternative power sources and autos. Exposure to CO causes many flu-like symptoms and can be fatal.
That’s why it’s so critical for consumers to identify potential dangers and take measures to help protect themselves and their families against this serious threat.  First Alert, a leading manufacturer of home safety products including CO alarms, recommends following these guidelines:

  • Have fuel-burning heating equipment and chimneys inspected by a qualified professional every year before cold weather arrives. During the heating season, clear filters and filtering systems of dust and dirt.
  • Be sure to open the flue for adequate ventilation when using a fireplace.
  • Inspect the pilot lights on natural gas appliances to ensure that the flame is blue. When a flame is mostly yellow in color, it likely is producing CO.
  • Clean out the lint and debris that may build up in the clothes dryer vent which leads to the outside of the house.
  • Only use generators in a well-ventilated location outdoors away from windows, doors and vent openings.
  • Use barbecue grills only outside and never indoors or in the garage.
  • Never leave an auto running in a garage, even for a couple of minutes and not even if the overhead garage door is open.
  • Install a CO alarm outside each sleeping area and on every level of the home, including the basement, as recommended by the National Fire Protection Association. Ensure that the alarms are plugged all the way in the outlet or, if battery operated, have working batteries installed. For better protection go a step further and install CO alarms inside each sleeping area.
  • First Alert recommends replacing CO alarms no later than every 5 years.

Product Details

Carbon Monoxide Information [39kb PDF]
  • Product Dimensions: 7.1 x 6.4 x 10.6 inches ; 9.6 ounces
  • Shipping Weight: 11.2 ounces (View shipping rates and policies)
  • Shipping: Currently, item can be shipped only within the U.S. and to APO/FPO addresses. For APO/FPO shipments, please check with the manufacturer regarding warranty and support issues.
  • ASIN: B000N8OYXI
  • Item model number: CO400
  • Average Customer Review: 3.8 out of 5 stars  See all reviews (67 customer reviews)
  • Amazon Best Sellers Rank: #444 in Home Improvement (See Top 100 in Home Improvement)


Customer Reviews

Most Helpful Customer Reviews
61 of 62 people found the following review helpful
Size Name:1-Pack|Amazon 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 Govenment 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......
Comment | 
Was this review helpful to you?
26 of 27 people found the following review helpful
Size Name:1-Pack|Amazon 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.
Comment | 
Was this review helpful to you?
33 of 40 people found the following review helpful
A must have! March 14, 2008
By A. Kay
Size Name:1-Pack|Amazon 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.
Comment | 
Was this review helpful to you?
Most Recent Customer Reviews
So far so good
I bought this 3-pack package and it arrived pretty fast. It's easy to use but I don't have any other feedback other than its look, outside quality, easy of use and price. Read more
Published 1 month ago by Jin Yan
Love it, so far.
This works well, as far as I can tell. We haven't had a real CO emergency yet, thankfully. I like the peace of mind I get from having this, especially since our furnace is so old. Read more
Published 1 month ago by Sara Bear
so far ok
This product works ok, no problems so far. Have it in my living room near my fireplace and no problems so far.
Published 1 month ago by thick madame
Value CO only alarm
Pros: loud noise, only needs 2 AA batteries (I have not test it with CO). Standard attachment anchors fit with my old alarm, so I don't need to make new attachment to the wall. Read more
Published 2 months ago by Lianto Suhardi
So far, so good.
So far, so good. Loud as can be when I first installed the battery or hit the Test button. Compact size (like a portable GPS), easy to wall mount. Read more
Published 2 months ago by R. Kuschner
cheap plastic, battery door does not close
I ordered 2 sets of 4 each for my rental properties. Five of the alarms were not usable. The door to the battery compartment did not close. When I tried to force one, it broke. Read more
Published 2 months ago by Larry Iddins
sucked - threw it away
once put on the wall, tested accurately only intermittently ... wasnt worth anything ... so the decison was made to throw it away
Published 3 months ago by sheisman
Replacement Seems to be Operating Correctly
Had to return the first one due to Test Button malfuncton. Got the replacement one the next day, on a Sat. Read more
Published 3 months ago by DG
Awesome
Easy Set-up. Hopefully never having to hear this alarm go off! Great to put on any wall or ceiling! Read more
Published 3 months ago by Ravi Mittal
No Home Should be without........
I store my Harley Davidsons in my Kicthen and I must say these are a must have. As soon as I start my bike my alarms start "Beepin" away so i know they work. Read more
Published 3 months ago by Randall Fay
Search Customer Reviews
Only search this product's reviews

Tags Customers Associate with This Product

 (What's this?)
Click on a tag to find related items, discussions, and people.
 
(4)
(2)

Your tags: Add your first tag
 

Customer Discussions

This product's forum
Discussion Replies Latest Post
No discussions yet

Ask questions, Share opinions, Gain insight
Start a new discussion
Topic:
First post:
Prompts for sign-in
 


Active discussions in related forums
Search Customer Discussions
Search all Amazon discussions
   
Related forums



So You'd Like to...


Create a guide


Look for Similar Items by Category