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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.
Amazon.com
Kidde’s KN-COPP-LPM battery-operated carbon monoxide alarm with digital display helps to provide your home with extensive protection against the dangerous threat posed by the odorless and colorless gas. With an increasing number of state and local governments passing legislation requiring CO detectors in homes, it’s never been a better time to safeguard your family against carbon monoxide exposure.
KN-COPP-LPM
Battery-Operated
Carbon Monoxide Alarm
At a Glance:
- Digital display allows for easy monitoring of CO levels
- Battery operation provides best protection during power outages
- Peak level memory displays the highest CO concentration since last reset
- Dimensions: 4.5 inches by 2.75 inches by 1.5 inches; weighs .66 pounds with batteries
- Five-year limited warranty
Kidde's KN-COPP-LPM carbon monoxide detector is a free-standing unit, adding flexibility to placement around your home. Features
The KN-COPP-LPM is an essential device to help warn you and your family of dangerous carbon monoxide levels in your home. 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. The easily visible digital display indicates the level of CO that the unit is sensing, and it updates the status every 15 seconds for timely and accurate readings. Its free-standing design allows for attachment to a wall or placement on a counter or nightstand for convenient and comprehensive protection. The KN-COPP-LPM also includes a slide-out battery door that provides immediate access to the power source as well as a battery safeguard that makes it difficult to close the cover without batteries installed. An LED lighting system on the unit signals power levels and sourcing: the green LED will flash once every 30 seconds to indicate the alarm is operating properly when power is present, and the red LED will pulse to indicate carbon monoxide has been detected until the device is reset or the CO threat is eliminated. This device has an expected 7-year lifespan and comes equipped with a five-year manufacturer’s limited warranty.
What's in the Box
One Kidde KN-COPP-LPM battery-operated carbon monoxide alarm with digital display and three AA batteries.
The KN-COPP-LPM features an easy-to-read digital display in front and an easy-access door to the batteries in back. (Click each to enlarge)
DB777
2025-09-03 10:46:31
I purchased the Kidde Carbon Monoxide Alarm ten years ago, and today, it reminded me of its reliability with a loud, audible chirp and a display reading "END," indicating that it has reached the end of its useful life. Over the years, this unit has proven to be incredibly accurate and dependable, providing me with peace of mind regarding my family's safety. It is long overdue that I write this review.One of the standout features of this alarm is the ease of replacing the batteries when needed. It’s a simple process that ensures the unit remains functional without any hassle. I appreciate how straightforward it is to maintain, allowing me to focus on what truly matters—keeping my home safe.Given my positive experience, I will definitely be purchasing another Kidde Carbon Monoxide Alarm to continue enjoying worry-free living for another ten years. Highly recommend this product for anyone looking for a reliable and user-friendly carbon monoxide alarm!
Wayne Foran
2025-08-23 11:08:37
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.
Love it get one!
2025-08-01 17:27:00
Works well, easy placement, looks good
Customer
2025-05-27 19:43:47
Works great
Customer
2025-05-15 15:36:09
Working fine! No home with any gas burning appliances (furnace, water heater, dryer, range, etc) should be without a working detector.
Cheryl L.
2025-05-07 15:21:03
Works great and very easy to install. So far no problems with this item.
amg
2025-05-06 15:19:43
We like having multiple of this same one so we can have one on each floor and within easy alert distance of our bedrooms too. Easy directions, although sometimes batteries can be a tight fit to get inside, but it is nice to know that batteries are secure inside the compartment once you get them in.
Reuel
2025-05-03 13:04:03
It is reassuring to have this monitor. My plug-in monitor alerted recently, alerted a second time, then was silent. I wanted another monitor to monitor the monitor! But seriously, CO can kill and this thing has a little light that it is working and can show the CO levels.
Vijay Ramkissoon
2025-04-28 17:32:35
I have had these Kidde products before and they have lasted a very long time before they reach their "end of life." I purchased this carbon monoxide detector to replace an older Kidde model and so far it has been tested and definitely works, let's hope it never has to beep that loudly again. I recommend this Kidde carbon monoxide detector because it is battery operated and has a useful LCD screen to show relevant information. Mounting screws and batteries were included along with a manual that you should read as it has placement and function details.
Samson O.
2025-03-16 11:51:57
GOOD
Werner Fuhrmann
2025-03-15 16:59:57
Easy-to-use and install. This was a replacement for an out dated unit.
Steve Matyasfalvi
2025-02-16 11:09:51
Is safety item!
Customer
2025-02-06 15:33:10
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.
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