Price: $27.94
(as of Dec 01, 2024 14:35:09 UTC - Details)

The Kidde Carbon Monoxide Detector, AA Battery Powered CO Alarm with LEDs, model 900-0146, is a carbon monoxide detector that uses electrochemical sensor technology to detect carbon monoxide. The CO detector is powered by 2-AA alkaline batteries located in the back of the unit, providing easy installation & no wiring, plus coverage during a power failure. The alarm is conveniently designed and portable enough for travel - simply install it on a wall or place it on a tabletop. When carbon monoxide is detected, an 85-decibel alarm will sound & a red LED will flash. A green LED indicates that the alarm is receiving power. The test-hush button allows you to test the battery operations as well as temporarily silence the low battery chirp warning. Plus, peak level memory records the last time carbon monoxide was detected or when the unit was last tested. Install a smoke detector & carbon monoxide detector on every level of your home and near bedrooms to help keep your family safe from fire & poisonous gas. UL Certified with a 10-year limited manufacturer's warranty.
Electrochemical sensor technology detects CO gas
Easy installation, no wiring needed, detects during a power failure by operating on 2-AA batteries (included)
Conveniently designed & portable: simple to install on a wall of your home or place on a tabletop
Green LED indicates power to the smoke detector, while an 85-decibel alarm & a red LED indicates the presence of carbon monoxide
Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
Test-Hush button makes it easy to test the carbon monoxide detector or temporarily silence the low battery chirp warning
UL listed with a 10-Year limited manufacturer warranty on the alarm only (not a battery performance claim). Warranty begins when the alarm is powered on. If that date is unknown, it should be assumed that replacement is needed.
Reviewer: Wayne Foran
Rating: 5.0 out of 5 stars
Title: Works Well, But Read the Fine Print!
Review: Attractive; Easy to Activate; Detects and Alarms Appropriately. I always read the 1 star reviews before buying a product. Some disturbing comments were: "batteries are impossible to insert" -- I had no trouble inserting the batteries (fit firmly but install with gentle pressure); "Tested with CO and got NO Audible Alarm" -- this was a big red flag, so I tested my unit upon activation. At 500+ ppm CO got good LED visible readout, but NO audible alarm. Was ready to repackage and return, but re-read the product information sheet: "This alarm measures the exposure to carbon monoxide over time; it is designed to sound at 85 decibels at 10 feet when it detects 70 ppm (parts per million) of CO for 60 to 240 minutes, 150 ppm for 10 to 50 minutes, or 400 ppm for 4 to 15 minutes." I retested, exposing unit to 400-650 ppm CO and got an audible alarm at around 6 minutes. Removal from source, display returned to zero and audible alarm ceased. Much more assured that the unit works properly. And Audible Alarm times are well within guidelines for exposure to CO and symptom development (see photo). Also really like that I can replace batteries. Previous units with sealed batteries didn't last anywhere near the 10 year "useable life" advertised.

Reviewer: Dragonfly-Vi
Rating: 5.0 out of 5 stars
Title: Good for the price
Review: Product was easy to install on the wall. So good so far. Alarm works when tested.

Reviewer: Trajork
Rating: 5.0 out of 5 stars
Title: Tested with CO in closed container at varying concentrations. Worked very well!
Review: With emergency products like CO detectors, it's hard to know if they really work unless you're actually being exposed to dangerous amounts of CO. And if a CO detector doesn't work, you wouldn't know; instead, you'd just be poisoned while thinking that nothing was wrong. The only way to really find out if it works is to put it in an airtight container and generate CO.Because I like to play with dangerous chemicals at home, I decided to try this out. Adding formic acid to concentrated sulfuric acid causes the formic acid (HCOOH) to break down into CO and H2O. I got both of these chemicals for less than $10/liter apiece, plus shipping. I put some sulfuric acid into a graduated cylinder and placed it in a 1-gallon airtight plastic container. I then added small amounts of diluted formic acid and rapidly closed the container.Sure enough, it worked! It registered CO concentrations that were well within the ballpark of what I'd expect to get with the amount of formic acid I added (using the ideal gas law to figure out what the maximum CO level would be). In high concentration tests, I found that the alarm goes off within 3 minutes of hitting 500 ppm (which is dangerous but would take several hours to kill, giving plenty of time to get to fresh air). In another test, it went off after about 20 minutes of CO levels around 190 ppm, which is dangerous but not lethal. Its peak reading is in the 910-920 ppm range; it doesn't display levels higher than that. Needless to say, it goes off within a minute or two of such high CO levels and anybody who sees 900+ ppm on the display should leave their house and seek medical help immediately.It worked well in low concentration tests too. Due to some strange US regulation, it displays "0" for any reading below 30 ppm. If you press the "peak level" button, though, it will tell you what its peak reading was even if it was below 30 ppm. This works down to the 10-15 ppm range, below which you don't really have to worry about CO at all. Prolonged exposure around 50 ppm leads to an alarm after a couple of hours.Another, simpler test (which anyone with a CO detector should do to make sure it's working) is to light a candle in an enclosed container with the CO detector, then close the container. The candle will burn through the available oxygen and a fair amount of incomplete combustion (releasing CO instead of CO2) will occur as it runs out of O2. I tried this and got 96 ppm with a small candle in my gallon container; a larger candle would probably release more. I then tried it by lighting a crumpled piece of newspaper in the container and got >910 ppm, which is reasonable because paper and wood experience pyrolysis, which releases lots of CO. Combustion of small amounts of acetone (a fairly clean fuel relative to paper) resulted in 300-550 ppm depending on how hot the fire got before I put the lid on; the lower reading relative to paper helps confirm that it's reading accurately.In conclusion - this $20 detector works very well when tested with real CO. It's accurate, the alarm goes off at dangerous CO levels, it only goes off if CO levels are dangerous, and it might just save your life.

Reviewer: J Scott
Rating: 4.0 out of 5 stars
Title: co detector
Review: Mounts easy. So far works as expected

Reviewer: Howard Gault
Rating: 5.0 out of 5 stars
Title: These do the job, and they last the whole certified time...
Review: There it is: 'These do the job, and they last the whole certified time...'

Reviewer: P. Burton
Rating: 5.0 out of 5 stars
Title: Good price
Review: Just what is needed

Reviewer: Denise
Rating: 5.0 out of 5 stars
Title: Bought to travel with
Review: I bought this because it will be easy to take on vacation, which I took to Mexico and it gave me piece of mind. It is battery operated. I just use it at home when not traveling.

Reviewer: Robin Taylor
Rating: 5.0 out of 5 stars
Title: old one died
Review: this works good

Reviewer: Francis L.
Rating: 5.0 out of 5 stars
Title:
Review: I had one for well over 10 years before it finally stopped. Glad to have the same on back. Peace of mind. Might be more money than other brands, but worth it

Reviewer: Germar
Rating: 5.0 out of 5 stars
Title:
Review: Dead after ten years. The new one actually states that it has a ten year battery in it. No complaints.

Reviewer: Client d'Amazon
Rating: 5.0 out of 5 stars
Title:
Review: fonctionnel

Reviewer: Amazon Customer
Rating: 4.0 out of 5 stars
Title:
Review: It seems to be a good product. I mean I've never had excessive CO in my house, so I don't know for sure.But the batteries last for a very long time.

Reviewer: Norman Sorensen
Rating: 5.0 out of 5 stars
Title:
Review: As advertized