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Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display 5.75 diameter x 1.8 depth

4.5 4.5 out of 5 stars 909 ratings
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Amazon's Choice in Carbon Monoxide Detectors by Kidde
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Purchase options and add-ons

Brand Kidde
Style Digital
Power Source Hardwired
Color Multi
Product Dimensions 1.8"D x 5.75"W x 5.75"H
Alarm fire safety, photoelectric, wired, interconnected, tamper-resistant
Operating Humidity 5% to 85% relative humidity, non-condensing
Compatible Devices Up to 24 Kidde devices (of which 18 can be initiating)
Upper Temperature Rating 37.8 Degrees Celsius
Sensor Type Photoelectric

About this item

  • Carbon monoxide alarm operates on a 120V wired power source with a 9-Volt alkaline battery (included)
  • Digital LED display shows the level of carbon monoxide the CO alarm is sensing
  • 85-decibel alarm announces when carbon monoxide is detected
  • Peak Level Memory records the last time carbon monoxide was detected or when the unit was last tested
  • Test-Hush Button makes testing the detector or silencing false alarms easy
  • Electrochemical sensor technology detects poisonous carbon monoxide gas inside your home
  • 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.
› See more product details

Customer ratings by feature

Easy to read
4.6 4.6
Easy to install
4.4 4.4
Accuracy
4.3 4.3
Easy to use
4.3 4.3
See all reviews
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Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display 5.75 diameter x 1.8 depth
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Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display 5.75 diameter x 1.8 depth

Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display 5.75 diameter x 1.8 depth

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From the manufacturer

900-0121
900-0121
900-0282

Kidde Carbon Monoxide (CO) Detectors – Plug-In

CO Comparison Chart-Images_900-0121

Hardwired CO Alarm

CO Comparison Chart-Images_C3010D

10-Yr Digital Display CO

CO Comparison Chart-Images_C3010

10-Yr CO Alarm

CO Comparison Chart-Images_900-0146LP

Battery CO + Digi Display

CO Comparison Chart-Images-9CO5-LP2

Battery CO Alarm

Customer Reviews
4.5 out of 5 stars
909
4.7 out of 5 stars
1,000
4.6 out of 5 stars
403
4.7 out of 5 stars
17,912
4.7 out of 5 stars
30,907
Price
$59.29 $42.95 $42.99 $24.89 $18.27
Detection Type
Carbon Monoxide Carbon Monoxide Carbon Monoxide Carbon Monoxide Carbon Monoxide
Power Source
Hardwired; 9VBackup (included) 10-Yr Built-In Battery 10-Yr Built-In Battery 3 AA Batteries (included) 2 AA Batteries (included)
No Battery Changes/Night Chirp
— ✔ ✔ — —
Digital Display
✔ ✔ — ✔ —
Mounting Options
Ceiling Wall Mount & Tabletop Wall Mount & Tabletop Wall Mount & Tabletop Wall Mount & Tabletop
Peak Level Memory
✔ ✔ — ✔ —
Event Memory
— — ✔ — —
Tamper Resistant
✔ — — — —
Interconnect Capability
✔ — — — —
End of Life Notification
✔ ✔ ✔ ✔ ✔
UL Listed
✔ ✔ ✔ ✔ ✔

Looking for specific info?

Product guides and documents

User Guide (PDF)

Product Description

Product Description

The Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display uses electrochemical sensor technology to detect poisonous CO gas in your home and alert you by sounding an 85-decibel alarm. Setup is easy as the Kidde carbon monoxide alarm plugs into a standard, 120V AC power outlet in your home, while a 9-volt alkaline battery (included) works as a backup in the event of a power failure. When carbon monoxide is detected, the digital display shows the level of carbon monoxide the alarm is sensing and updates every 15 seconds. Peak Level Memory records the last time carbon monoxide was detected or when the unit was tested. The Smart-Hush button silences the unit for approximately 8 minutes, which is helpful when this smoke detector carbon monoxide detector combo sounds from things like routine cooking or shower steam. Install a carbon monoxide smoke detector combo on every level of your home and near bedrooms to help keep your family safe. UL Certified with a 10-year limited manufacturer's warranty. Meets requirements of UL 2034, UL217, NFPA72, (chapter 11 2002 edition) The State of California Fire Marshal, NFPA101 (One and two family dwellings) Federal Housing Authority (FHA), Housing and Urban Development (HUD).

Amazon.com


An essential device designed to protect you and your family from the dangers of carbon monoxide in your home, the Kidde KN-COP-IC carbon monoxide alarm can be installed on the surface of any wall or ceiling and hardwired into your home's electrical system. It also offers a digital display that shows the current carbon monoxide (CO) level at a glance as well as a battery backup. 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.



The hardwired Kidde KN-COP-IC carbon monoxide alarm.


Easily mounts to ceilings or walls, and it provides a digital display and battery backup.

Features

The AC wire-in Kidde KN-COP-IC carbon monoxide alarm offers multiple contractor-friendly features to ensure easy installation and minimal troubleshooting. It can be installed on any standard single gang electrical box (up to a 4-inch octagon junction box), and it features a snap-on electrical harness for quick installation and an adjustable mounting bracket for perfect alignment. The unit also includes a smart interconnect system with up to 24 Kidde devices, including smoke alarms. When interconnected, it can sound its carbon monoxide alarm pattern as well as sound a different alarm pattern when a Kidde smoke alarm is in alarm mode.

It features three color LEDs for at-a-glance status updates. A green LED lights constantly when AC power is present, and it flashes every 7 seconds when in battery mode. An amber LED illuminates during a CO incident, while a red LED flashes in unison with the audible alert for both a smoke or CO incident. A digital display allows constant monitoring of carbon monoxide levels and updates every 15 seconds to let you know if levels change. The peak level memory feature displays the highest CO level measured since the last reset. A battery-backup system (powered by included 9-volt battery) provides continuous monitoring of carbon monoxide levels even during a power failure. It has a seven-year operating life and is backed by a five-year limited warranty.

What's in the Box

One Kidde KN-COP-IC hardwire carbon monoxide alarm, one 9-volt battery, one adjustable mounting bracket, and operating and installation instructions.



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Top Brand: Kidde

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Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display 5.75 diameter x 1.8 depth
Kidde Hardwired Carbon Monoxide Detector with 9-Volt Battery Backup, Digital LED Display 5.75 diameter x 1.8 depth
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Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Voice Alerts, Interconnectable, LED Warning Light Indicators
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Kidde Hardwired Smoke & Carbon Monoxide Detector, AA Battery Backup, Interconnectable, LED Warning Light Indicators
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Price$59.29$19.90-9% $19.99
List: $21.99		$46.99$49.52-16% $46.06
List: $54.99
Delivery
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Get it May 15 - 20
Get it as soon as Thursday, May 16
Get it as soon as Thursday, May 16
Customer Ratings
4.54.5 out of 5 stars909
4.44.4 out of 5 stars227
4.64.6 out of 5 stars690
4.44.4 out of 5 stars61
4.64.6 out of 5 stars344
4.54.5 out of 5 stars1,083
Easy to install
4.4
4.7
4.6
—
4.2
3.8
Value for money
4.1
3.7
4.2
—
4.2
3.7
Easy to read
4.6
4.2
4.4
—
—
—
Accuracy
4.3
4.1
—
—
—
3.6
Sold By
Amazon.com
WEICAO Official
Ledronco
shenzhenshi fuyingtong shiye youxiangongsi
Amazon.com
Amazon.com
power source
Hardwired
Battery Powered
Battery Powered
Battery Powered
Hardwired
Hardwired
sensor type
Photoelectric
Electrochemical
Electrochemical
Electrochemical
Electrochemical, Photoelectric
Photoelectric, Electrochemical
lower temperature rate
40 degrees fahrenheit
—
0 degrees celsius
—
40 degrees fahrenheit
40 degrees fahrenheit
upper temperature rate
37.8 degrees celsius
—
50 degrees celsius
—
100 degrees fahrenheit
100 degrees fahrenheit
style
Digital
Safety
Digital
Industrial
6th Edition Alarm
6th Edition Alarm
alarm
fire safety, photoelectric, wired, interconnected, tamper-resistant
Audible
Audible
Audible
Smoke and Carbon Monoxide Alarm
Fire, Smoke, Carbon Monoxide
operating humidity
5% to 85% relative humidity, non-condensing
—
—
95 percent
10%-95% relative humidity, non-condensing
10% to 95% relative humidity, non condensing

Important information

Legal Disclaimer

factory

Bulb Voltage

120 volts_of_alternating_current

Customer reviews

4.5 out of 5 stars
4.5 out of 5
909 global ratings

Customers say

Customers like the quality, ease of installation, connectivity, and value of the gas smoke fire alarm. For example, they mention it works well, does not false alarm, and is good value for money. Some appreciate readability. That said, some complain about the battery life and disagree on carbon monoxide detection.

AI-generated from the text of customer reviews

123 customers mention98 positive25 negative

Customers like the quality of the gas smoke fire alarm. They say it works well, has no issues, and starts working immediately. Some say it's reliable for 7 years and a great replacement for an older unit.

"Excellent product" Read more

"Fit perfectly into the original wiring and plate. Works great" Read more

"...They started working immediately and have had no problems so far...." Read more

"Installed months ago. No issues so far. Satisfied with purchase." Read more

66 customers mention66 positive0 negative

Customers find the installation of the gas smoke fire alarm to be easy. They mention that it's simple and fast to install as replacement alarms.

"...Extremely easy to install. No surprises, modifications needed. Thank you Kidde!!" Read more

"...The units were easy to install for the most part, as the mounting plate and wiring harness are identical to those supplied with the smoke alarms...." Read more

"...It installed very easily, having a 3-wire hookup for power and connection to other home alarms...." Read more

"...The switch-over from the old detectors to the Kidde detectors was simple and fast...." Read more

25 customers mention19 positive6 negative

Customers like the connectivity of the gas smoke fire alarm. They say it works well, does not false alarm, and is easy to install. Some appreciate the ability to combine the CO alarms with smoke alarms on a single unit. They also mention that it integrates with their hard-wired smoke detectors and that it sounds when they are tested.

"...To me, the important features were the ability to combine the CO alarms with smoke alarms on a single system, the digital readout (ppm CO), and the..." Read more

"...The first one I installed worked great with no false alarms over roughly 9 years. I'm still alive, too, so I assume it didn't detect any CO...." Read more

"Bought these for the dual alarms for both CO (carbon monoxide) and smoke. Maybe one day they'll make one that detects CO, smoke and radon!..." Read more

"...The alarm will die in several years whether you use it, or if it just sat on the dealers shelf for part of the time...." Read more

20 customers mention18 positive2 negative

Customers are satisfied with the value of the gas smoke fire alarm. They mention that it's a great purchase, worth the money, and a reliable product.

"...The connector used to hardwire the detector makes it easy to buy the next ation of detectors and install them yourself. This is the one you want." Read more

"Fast, Professional & Honest Seller. Product Delivered On Time & As Described. TY!" Read more

"...Then I wanted a good price for the value. Kidde had all features and attractive pricing. One alarm arrived without a base plate...." Read more

"Easy install, works well, great price and delivery." Read more

16 customers mention16 positive0 negative

Customers find the digital display of the gas smoke fire alarm easy to read and helpful. They also say it looks great on the wall and provides a visual operational mode status.

"...I like that this has a digital readout so I can tell if it is a false alarm or if I really do need to evacuate the house...." Read more

"...I really like these new Kidde CO detectors because they have a digital display, which will show the level of CO if there is an alarm, and they will..." Read more

"...Installation is easy and blends in with most contemporary decor...." Read more

"...I especially like that they have a digital display, unlike the old one.Bottom line - Easy to install, nice digital display" Read more

8 customers mention8 positive0 negative

Customers are satisfied with the fit of the gas smoke fire alarm. They mention that it fits right into their existing wall mount, and that it's the perfect size for replacement.

"Fit perfectly into the original wiring and plate. Works great" Read more

"Fit perfectly for replacement. Don't cheap out on safety items with weird name imitators, go with the leader." Read more

"...Perfect size too - didn't even require paint touch ups!" Read more

"...this to replace an existing CMA that was in my house, it fit perfectly in the old bracket. Simple installation!" Read more

9 customers mention6 positive3 negative

Customers are mixed about the carbon monoxide detection of the gas smoke fire alarm. Some mention that it protects against CO carbon monoxyde, has great features, and makes their family feel more safe. However, others say that it is clearly only a carbon mon oxide detector with no voice at all.

"...It is easy to install, has great features, and makes my family members feel more safe...." Read more

"...It is clearly only a carbon monoxide detector with no voice at all. May be a good product, but was not the product I needed or what was described." Read more

"Easy to install good value and feel safer" Read more

"Protects against CO carbon monoxide" Read more

23 customers mention5 positive18 negative

Customers are dissatisfied with the battery of the gas smoke fire alarm. They mention that it dies quickly, giving an error, and giving a low battery warning. Some customers also report that the battery explodes and burns a hole in the battery.

"...One thing I found out about the CO detectors is that they have a limited lifespan and need to be replaced every 4-5 years...." Read more

"9v battery was dead when I received it, but I got it opened, so I can’t dock stars for that. Otherwise works just fine." Read more

"These carbon monoxide detectors don't have a long life. This is the 2nd one I have purchased in 8 years. They are very easy to install...." Read more

"...a single system, the digital readout (ppm CO), and the 120 volt power with battery backup...." Read more

Nice, but I miss the KN-COPF-i
5 Stars
Nice, but I miss the KN-COPF-i
This is a good Carbon Monoxide detector, but it doesn't look as nice as the obsolete KN-COPF-i that was flush mounted in the wall. After 7 years CO detectors expire and must be replaced. The obsolete model looked more upscale than the new model that is a standard Round design like everything else on the market.I also added one on the wall in the basement utility room with the furnace and water heater.
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Top reviews from the United States

Len W
5.0 out of 5 stars Carbon monoxide detector
Reviewed in the United States on March 28, 2024
Pattern Name: DetectorVerified Purchase
Excellent product
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vincent sgroi
5.0 out of 5 stars Thank you!
Reviewed in the United States on March 31, 2024
Pattern Name: DetectorVerified Purchase
This C/O detector was an exact replacement for the one on my second floor. Extremely easy to install. No surprises, modifications needed. Thank you Kidde!!
Helpful
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L. R. Levy
5.0 out of 5 stars Perfect
Reviewed in the United States on January 4, 2024
Pattern Name: DetectorVerified Purchase
Fit perfectly into the original wiring and plate. Works great
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Jon Edens
4.0 out of 5 stars Works well, fairly easy installation
Reviewed in the United States on April 9, 2013
Pattern Name: DetectorVerified Purchase
I bought two of these along with seven of the Kidde model PI 2010 smoke alarms as part of an interconnected alarm system I needed to install. To me, the important features were the ability to combine the CO alarms with smoke alarms on a single system, the digital readout (ppm CO), and the 120 volt power with battery backup. The units were easy to install for the most part, as the mounting plate and wiring harness are identical to those supplied with the smoke alarms. They started working immediately and have had no problems so far. Plugging the wiring harness into the back of the alarm was somewhat difficult, and it will need to be unplugged to change the battery. Because of that I'm not looking forward to the annual task of replacing batteries on all nine units, and it leaves me wondering when the designers will come up with an easier type of connection. Other than that I have no complaints, and I would recommend these units for anyone needing a 120 volt powered CO alarm.
2 people found this helpful
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LoveAmazonCH
5.0 out of 5 stars This is the one you want
Reviewed in the United States on December 8, 2023
Pattern Name: DetectorVerified Purchase
This is 3rd Kidde probably monoxide detector that I have installed in my home over the last 20 years. Each time I have bought another, they have upgraded the features and made it even better. The connector used to hardwire the detector makes it easy to buy the next ation of detectors and install them yourself. This is the one you want.
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Butchboy
5.0 out of 5 stars Nice Alarm, Easy to Install
Reviewed in the United States on November 4, 2013
Pattern Name: DetectorVerified Purchase
I bought this alarm to replace an older failing alarm that would randomly go off (usually in the middle of the night). I like that this has a digital readout so I can tell if it is a false alarm or if I really do need to evacuate the house. It installed very easily, having a 3-wire hookup for power and connection to other home alarms. It took me all of 15 minutes to screw the back of the alarm to the gang box, connect the wires, twist on the cover, and perform a quick test. I haven't had a false alarm since (crossing my fingers).

The only suggestion I have is to provide a place on the front plate where you can place a sticker or write the expiration date of the alarm. This alarm will stop functioning after 7 years and it is easy to forget even as you change the battery. I ended up taking a sharpie and writing the expiration info on the face, so when the alarm goes off in 7 years, I or the new owners of the house will know why.
One person found this helpful
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JM
5.0 out of 5 stars Easy install
Reviewed in the United States on December 7, 2023
Pattern Name: DetectorVerified Purchase
Installed months ago. No issues so far. Satisfied with purchase.
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Dima
1.0 out of 5 stars Don’t count on it
Reviewed in the United States on April 24, 2024
Pattern Name: DetectorVerified Purchase
The media could not be loaded.
 In a critical moment, this 'high-tech' smoke detector failed to react, putting our home at risk. Despite the emergency, there was no beeping or change in particle detection. Disappointing reliability when it mattered most.
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Top reviews from other countries

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ATVFUN
5.0 out of 5 stars Installed and seems to be working ok
Reviewed in Canada on March 25, 2024
Pattern Name: DetectorVerified Purchase
Wont know if its working until there is a CO problem. But so far so good...
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Amazon Customer
5.0 out of 5 stars It's a smoke alarm/carbon monoxide alarm
Reviewed in Canada on May 31, 2019
Pattern Name: DetectorVerified Purchase
Easy to install. Has sounded when required. clean lines. Decent pricing. Would buy again when required.
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Fritz
5.0 out of 5 stars Très bon produit
Reviewed in Canada on September 26, 2020
Pattern Name: DetectorVerified Purchase
Très facile à installer
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Jesse
4.0 out of 5 stars Battery that came with it was dead.
Reviewed in Canada on February 25, 2024
Pattern Name: DetectorVerified Purchase
Received this to replace a device that had outlived its lifespan. Installed it with the battery that came with it and got a low battery alert. Tried a couple new batteries that I had already and within a day got low battery warnings for those as well. I was getting ready to return it but then noticed that there were 3 recommended batteries listed on the battery door. Went out and bought one of those and have not had a problem since.
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BrianJ
5.0 out of 5 stars Excellent Carbon Monoxide Alarm!!
Reviewed in Canada on August 1, 2018
Pattern Name: DetectorVerified Purchase
This works perfectly and I love the display (which will flash a number if any there are any battery issues)
One person found this helpful
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