First Alert Carbon Monoxide Detector, Plug-In Alarm with Test & Silence Button, CO600, White, 1-Pack

Since most of the major appliances, stove, heater, water heater etc in my home are powered by natural gas I decided CO alarms would be a good Idea. This alarm has a small form factor so it does not take up all the space of the electric socket, you will still be able to use the top plug. Its a plug and play application. Plug it in run the test and you are good to go. Although small the alarm has a loud warning alarm in case CO is detected. I haven't experienced any false alarms or weird behavior from the alarm and so far is has worked well. The US Consumer Product Safety Commission recommends buying and installing a CO alarm that meets the requirements of the current UL 2034 safety standard. I saw a review here stating that this alarm was not UL 2034 certified, which is not true. The CO600 is UL2034 certified. Underwriters Laboratories Inc. UL2034 defines three specific alarm points by which all residential CO alarms must alarm. They are measured in parts per million (ppm) of CO over time (in minutes). UL2034 Required Alarm Points: * If the alarm is exposed to 400 ppm of CO, IT MUST ALARM BETWEEN 4 and 15 MINUTES. * If the alarm is exposed to 150 ppm of CO, IT MUST ALARM BETWEEN 10 and 50 MINUTES. * If the alarm is exposed to 70 ppm of CO, IT MUST ALARM BETWEEN 60 and 240 MINUTES. The detector must ignore CO levels of 30 ppm or less for at least 30 days and ingore levels of 70 ppm or less for at least an hour. There are detectors available that will alarm at a lower level. All detectors must have a silence button. Pushing it will silence the alarm for four to six minutes. If the concentrations stay above 70 PPM it will alarm again in six minutes. (Previously set at 100 PPM) The detectors have only two alarms, a full alarm and a trouble alarm. The second revision of UL-2034 detectors allowed (not mandated) warning alarms that sounded at low levels. Some found this confusing. Detectors manufactured under the new standard should reduce the number of nuisance alarms. These detectors must not alarm in the presence of the gases listed in the following table below the indicated level. Methane 500 PPM Butane 300 PPM Heptane 500 PPM Ethyl Acetate 200 PPM Isopropyl Alcohol 200 PPM Carbon Dioxide (CO2) 5,000 PPM More info on UL-2034 can be found on Underwriters Laboratories website ul.com If the device starts to malfunction/ give false alarms I will update my review.

I ordered this as a replacement for the exact same product. It produced the ‘end of life’ warning seven years after installation almost to the day. I never had an issue with false readings, and when I had my furnace serviced, I had the tech check for built up fumes to see if the sensor had missed a build up, and it was not misreading. The plug in feature is great…no need to replace batteries!

Easy to plug in and good to have the peace of mind knowing it’s there. Our previous alarm got to end of life and started beeping - I would appreciate a little more clarity which beeps are end of life and which beeps are the alarm!

I'm giving this item 4 stars due to price, because there is a First Alert plug-in option for less money which has the additional safety feature of a battery for backup in case of power failure. Thought I was ordering that model but didn't notice this one does not have the battery. I like that these alarms from First Alert let you know when they cease to function, which the instructions clearly state will happen. It chirps differently than when you test the device. My First Alert model 606, which just failed, lasted for about 8 years. I will keep this and also get model 606 for the bedroom.

EXPENSIVE, BUT WORTH IT....HAD 3 YEARS ALREADY & NO ISSUES.

Seems to be working great! Nobody's died yet! Peace of mind at a great price.

I was prepared to replace batteries in our carbon monoxide detectors when I learned that they have a limited life. So I ordered these replacements and was able to keep our home safe in time for winter and greater use of our flame powered HVAC system. These were exactly what we needed and I now know that there is not be a battery replacement in the future, but rather the whole detector unit.

Very nice safety device. I have one in the garage and one in the master bedroom. As a plugin it never needs charging and it is reasonably priced. Better safe than sorry.

Shipped quickly. Ordered to replace an existing unit that had expired, so I already know what to expect from it. Good product.

Seems to work well.

Does what its made to do

Carbon monoxide detection. Easy to install

3 pack was nice and a spot to write the date.