Features:

  • Digital Display - Displays the level of carbon monoxide the unit is sensing. Shows CO level in PPM (parts per million). Updates digital reading every 15 seconds allowing you to see if levels change. Peak Level Memory displays the highest CO concentration measured since the last reset
  • Battery Operated - Provides best protection during power outages. Battery Safeguard makes it difficult to close the cover without batteries in the unit. Low Battery Signal alerts user when the batteries need to be replaced. Slide-Out Battery Door Cover gives immediate access to batteries
  • Test/Reset Button - Tests unit’s electronic circuitry & horn and resets the unit during alarm. Tests CO alarm circuit operation and allows you to immediately silence the alarm
  • LED's - Green LED for normal operation, Red LED for alarm. Temperature range 40˚F (4.4˚C) to 100˚F (37.8˚C)
  • Provides peace of mind against the silent killer and a digital display
Kidde Battery Operated Carbon Monoxide Detector Alarm

This unit was purchased as a replacement for another Carbon Monoxide detector. My old unit finally died after seven years. It plugged into the wall and since electrical outlets are always in sort supply I selected a battery operated model. The device comes with three AA alkaline batteries, a User Manual and two screws and anchors to mount it on the wall, if desired. It stands up on its own just fine so I placed it on top of a dresser. It is stone cold simple to operate -- slide the back panel open, install the included batteries and slide the panel closed. Push the test/reset button and the piercing alarm will sound and the number in the digital display will indicate 888 and then go to 0, assuming no carbon monoxide is detected. The digital display remains on so a number is always displayed, and a tiny green LED light will periodically blink which indicates the unit is operating, and all is well. . The User Guide offers information regarding proper placement of the unit -- areas to avoid -- along with a key explaining the different red and green light flashes and alarms sounding, which indicate normal operation, a genuine alarm, low battery, etc. As with smoke detectors, it is a good idea to replace batteries annually. Rechargeable batteries should not be used with the unit. Reasonably priced, I like the constant digital display and that it is small, so if not wall mounted, it is easy to move from room to room to do a quick air check.

Saved us from near disaster

Worked like a charm. Issue with furnace while sleeping. The one in the basement was loud enough to hear on 3rd floor and woke us up before the upper levels of our house had a high enough reading to alert us. Just like advertised - spend the extra $$ for a digital read - this one is worth the extra money. While ventelating the house we could watch the numbers go down real time - ✅

Seems to be a quality product

I did a lot of reading on all the different type of CO1 detectors offered here on Amazon. I chose this model not only for my own home, but also for the customers I install CO1 units into their homes (I'm a contractor). This is not the cheapest model available and the same company makes one without the digital readout which is less expensive, but I believe it's worth the extra money to have the readout. That way, I feel that if there is a problem, it may be caught sooner than later if the amount of emissions are listed. This unit is guaranteed to last seven years as opposed to the other model without the readout at five years. It's one place I would not want to cut corners. I also prefer the types that are mounted at eye level and not into an outlet.

This Product Saved My Wife’s Life.

I bought this carbon monoxide monitor in 2014 and I’m glad I did. A couple of days ago, while I was out of town, my wife heard the alarm go off. When she looked at the monitor and it was reading 117 parts per million. She grabbed the our dog and cat and ran over to my neighbor’s house and called emergency services. By the time fire officers tested the house, the monoxide levels had already shot up to 147! From my research, 150 parts per million = death. The gas company ran all tests inside and outside the house, the culprit was a faulty valve on the water heater. Bottom line: If I had not have bought this alarm, my wife would have went to bed and not woke up in the morning and I would have found her upon returning from a trip. Terrifying thought. Thank you, Kidde for this product. You’ve earned a customer for life. P.S. Please get a carbon monoxide alarm if you don’t have one. There is no odor or taste!

Inexpensive but essential safety item.

Ordered this as a safety measure for a patio heater I'm using to heat a small greenhouse. The propane heater emits zero or close to zero PPM of CO gas. My redneck wood burning heater is still a work in progress and pumps out plenty of CO gas. It needs to be sealed better as the levels reach >200PPM and set the alarm off.

Easy to set up

Lori's husband here. I just ordered and received 2 of these a few days ago. I purchased 2 - one for each floor as is recommended. I have confidence in Kidde alarm products as the one this replaces on the ground floor which was a combo CO2 and poisonous gas detector saved our house from blowing sky high high with us in it a number of years ago. A gas valve that failed in a natural gas fireplace insert downstairs during the summer started spewing gas. We got a few windows opened upstairs and headed out the door to get the gas shut off. It saved the day no doubt. The readout and test cycle on these are functioning normal so I can only assume they are busy protecting us. They shipped on time and are easy to set up. Being battery operated they are easy to place in the house. They need to be place at least at eye level for easy monitoring and early warning as CO2, being lighter than air, rises. Batteries need changing periodically so be prepared for that by having extras in the house. We replaced our previous detectors batteries annually at the same time we changed the ones in our two smoke detectors. I am hoping these will last for changing them out on an annual basis.

Love that it sits on a table or counter & not hung on a wall. Large display shows highest "CO" concentration since last reset.

My last Carbon Monoxide Detector was about to die (it was about 7 years old and I kept getting those end of life beeps which were driving me crazy). I found this one on Amazon and loved that it could be placed on a table or counter rather than having to hang it high up on a wall, which is very difficult to get to when I need to change the batteries twice a year. Anyway I'm very happy with this purchase I love that it has a large digital display so it’s easy to read, even in low-light conditions. It also has a Peak-level memory display that shows the highest CO concentration measured since the last reset. In addition to that the slide-out battery door makes it very easy to change the batteries and it has a Low Battery Signal so I’ll know if the batteries are getting low (although I do change them twice a year when I change the time on the clock. I also like that it meets Underwriters Laboratories (UL) UL2034 compliance. It was easy to order and arrived in 2 days (I have Amazon Prime). It arrived in good condition and looks like the pictures posted online.

Tested with CO in closed container at varying concentrations. Worked very well!

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.

Seems to work as expected

I have another CO alarm that often goes off when I use my heater. It has no readout, however, so I ordered this one so I'd know whether I was actually in danger or if my alarm was simply being dramatic. When the other alarm goes off now and this one doesn't, I can look at this and see that the display reading is around 33, which means I'm not dying and don't need to disturb the fire station, but may want to open a window and turn on a fan until the reading goes back to zero.

Accurate & Life-saving

Within two weeks of buying this pair of alarms, because we had a hunch there was some intermittent gas leakage somewhere in or around the house, the alarm went off. We were able to evacuate safely and when the fire department arrived their sensor determined the alarm reading to be dead on accurate. Very glad I bought these when I did and would recommend everyone that uses natural gas in their home to get these installed.

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