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Kidde Carbon Monoxide Detector, Plug In Wall with 9-Volt Battery Backup, Digital LED Display

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Availability: In Stock.
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Arrives Sunday, Feb 1
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Size: 1 Pack


Color: White


Features

  • 1
  • Made in US
  • Easy Installation - simply plug-in to a standard, 120V outlet in your home
  • 9-volt battery backup provides protection during a power outage
  • 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

Description

The Kidde Carbon Monoxide Detector, Plug In Wall 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. Extension cord (included) allows for placement on a table or shelf. 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). Protect your family from the dangers of carbon monoxide (CO) exposure with the Kidde KN-COPP-3 Nighthawk Plug-In Carbon Monoxide Alarm with Battery Backup and Digital Display. The Nighthawk is an easy-to-install unit that provides reliable protection against the dangers of CO. It features a digital display that shows CO levels in parts per million allowing you to see if, how, and when levels change.KN-COPP-3 Nighthawk Carbon Monoxide Alarm At a Glance:Plug-in unit with battery backup and digital display that shows CO levelLevel button displays the peak CO level recorded by the alarm since it was last resetLoud alarm pattern sounds when unit detects elevated CO levelsDirect-plug, 6-foot power cord, and table top mounting options.Five-year limited warranty This discreet alarm is designed to fit into any standard A/C outlet in your house. View larger. The easy-read digital display updates every 15 seconds to indicate any abrupt changes or alarming trends in CO levels. View larger.Advanced Technology in an Easy-to-Install, Plug-In Design Designed for home use, the Kidde KN-COPP-3 Nighthawk is a UL-listed, A/C-powered, plug- in CO alarm that utilizes sophisticated electronic components and sensor technology to protect you and your family from the dangers of CO. It plugs directly into a standard A/C outlet and includes a 9-volt battery backup that provides continuous monitoring of CO levels--even during power outages.About Carbon Monoxide: The Silent Killer The leading cause of accidental poisoning deaths in North America, carbon monoxide (CO) is often referred to as the silent killer because it's odorless, tasteless, and invisible. Carbon monoxide poisoning can come about via a number of sources, including everyday items and appliances in your home or office. And because symptoms of CO poisoning mimic the flu or other common illnesses it can often go undiagnosed.Audible Alarm Pattern Alerts you to Elevated CO Levels When placed on every level of your home, alarms like the KN-COPP-3 Nighthawk can help protect everyone in the house from CO exposure by giving you an unmistakable signal when levels have reached an unhealthy point. If unhealthy levels are detected, the alarm will emit four quick audible beats every five seconds until either levels decrease or the reset button is pressed.Easy-to-Read Digital Display Shows CO Levels The KN-COPP-3 Nighthawk is unique among traditional CO alarms because of its digital display. This display clearly shows levels of CO that the unit has detected and stored-- from 30 to 999 ppm--and it updates every 15 seconds to indicate any abrupt changes or alarming trends. The display also shows the peak CO level recorded by the alarm since it was last reset or unplugged.LED Shows Sensor Status With the KN-COPP-3 Nighthawk, you never have to wonder if the sensor is functioning properly. A blinking dot in the lower right-hand corner of the display denotes normal operation, so you can trust that it's working. In addition, you can test alarm function by pressing the test/reset button at any time to verify that the horn and electric circuitry are operating properly.Convenient Mounting Options The KN-COPP-3 Nighthawk has a low-profile design that makes it suitable for any room in your home. The detector can be plugged into any standard A/C outlet; it's plug can be snapped into the back of the unit and can be rotated so the alarm remains vertical, independent of whether the electrical socket is mounted vertically or horizontally. In addition, the alarm comes with a 6-foot extension cord, so the unit can be plugged into the wall outlet and then placed on a table or shelf. For the most thorough protection, place an alarm on every level of your home.The UL-listed Kidde KN-COPP-3 Nighthawk has a seven-year life and is backed by a five-year limited warranty.About Kidde: A UTC Fire and Security Brand Renowned for global leadership in fire detection and suppression, Kidde provides solutions ranging from portable fire extinguishers to advanced industrial controls such as flame detection and explosion suppression systems. Kidde is a UTC Fire and Security brand, with a history that's rich with innovations, from the patent of the Chubb Detector Lock in 1818 to the development of the world's first wireless networked smoke detectors in 2004.What's in the Box Kidde KN-COPP-3 Nighthawk CO Alarm, 9-volt battery, mounting hardware, and installation guide. Keep your family safe by placing alarms and extinguishers in each area of the house, and by having a fire escape plan. Click here for a detailed image. P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); From the Manufacturer The leading cause of accidental poisoning deaths in North America, Carbon Monoxide is odorless, tasteless and invisible, it's a silent killer. Kidde CO alarms include the most accurate sensing technology available, the patented Nighthawk electrochemical sensor. This alarm can be mounted three ways: plug directly into AC receptacle, mount on tabletop using 8 foot power cord, or wall-mount. The digital readout continuously displays carbon monoxide levels from 30-999 parts per million. This unit has a loud, 85-decibel alarm that sounds when CO reaches dangerous levels. One of the features of this product is peak level memory, which means this unit will recall highest level of CO present since previous reset. Install at least one CO alarm on every floor and in sleeping areas. Make sure CO alarms are at least 15 feet away from cooking or heating appliances to prevent false alarms. Replace CO alarms every 5 to 7 years to benefit from the latest technology upgrades. See more

Brand: Kidde


Style: Detector


Power Source: Plug In


Color: White


Product Dimensions: 1.75"D x 3.75"W x 6.06"H


Alarm: Audible


Operating Humidity: 5% to 95% relative humidity, non-condensing


Compatible Devices: Residential


Upper Temperature Rating: 37.8 Degrees Celsius


Sensor Type: Ionization


Brand: ‎Kidde


Style: ‎Detector


Power Source: ‎Plug In


Color: ‎White


Product Dimensions: ‎1.75"D x 3.75"W x 6.06"H


Alarm: ‎Audible


Operating Humidity: ‎5% to 95% relative humidity, non-condensing


Compatible Devices: ‎Residential


Upper Temperature Rating: ‎37.8 Degrees Celsius


Sensor Type: ‎Ionization


Global Trade Identification Number: ‎05


Material: ‎ABS


Number of Items: ‎1


Manufacturer: ‎Kidde


UPC: ‎784908007605


Part Number: ‎900-0076


Item Weight: ‎1.05 pounds


Item model number: ‎KN-COPP-3


Batteries: ‎2 AA batteries required. (included)


Is Discontinued By Manufacturer: ‎No


Size: ‎1 Pack


Finish: ‎white


Pattern: ‎Detector


Shape: ‎Rectangular


Voltage: ‎120 Volts


Wattage: ‎1 KW


Installation Method: ‎Plug-in


Luminous Flux: ‎1 Lumen


Number of Handles: ‎1


Cutting Diameter: ‎1 Centimeters


Certification: ‎Yes


Usage: ‎Amateur


Included Components: ‎one 9V battery, one CO alarm, model KN-COPP-3, one mounting hardware packet (for wall-mount option), one user manual


Batteries Included?: ‎Yes


Batteries Required?: ‎Yes


Battery Cell Type: ‎Alkaline


Description Pile: ‎DURACELL 9V


Battery Capacity: ‎9


Warranty Description: ‎10 Year Limited


Assembled Diameter: ‎1 Centimeters


Date First Available: January 16, 2007


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Feb 1

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Reliable, Easy to Use, and Gives Peace of Mind 🏠⚠️
Size: 1 Pack Color: White
I purchased the Kidde Carbon Monoxide Detector for my home, and it has been excellent. The plug-in design with a 9-volt battery backup is very convenient, ensuring continuous protection even during power outages. The digital LED display clearly shows CO levels, which is helpful for peace of mind. Installation was straightforward—just plug it in and insert the battery. The alarm is loud and responsive, and the unit has a solid, durable feel. I also like the compact design, which fits nicely on any wall without being obtrusive. This detector gives me confidence that my family is safe from carbon monoxide, and it’s reassuring to know it’s reliable and easy to maintain. Simple to use, highly dependable, and a must-have for every home. ... show more
Reviewed in the United States on November 3, 2025 by tara speece

  • Quality CO detector. Worthwhile investment.
Size: 1 Pack Color: White
Quality Kidde brand CO detector. I replaced my original one with this identical one after 10 years of service, when it finally beeped and showed "END" in the display, which renders it useless, which is by design. Ironically, I never had any CO issues or alerts, until about a few months before its 10th anniversary in service. My home's natural gas boiler was over 25 years old, and begin leaking CO from incomplete combustion issues. This Kidde CO detector audibly alerted me and displayed the current CO level as well as the maximum CO level that it had recorded. Very simple to use and displays basic, yet useful information. I was able to open the windows and ventilate my house to prevent the excess CO buildup from harming us, thanks to this CO detectors audible & visual alerts. Hope they're still making this model 10 years from now, when I will need another one, or if I decide to move and want to purchase a new one. It's certainly not the cheapest CO unit on the market, but it's a good value for the money. Oh, it plugs directly into any standard 110-volt power outlet and it has a 9-volt battery backup, battery included. Although they recommend you replace the 9V backup battery every few years, I never replaced mine, and it was still almost as good as the day it was installed. My Kidde CO detector is plugged into an outlet in our upstairs hallway just outside of our bedroom. Fortunately, it also fit perfectly next to (below) my plug-in doorbell, which was a huge plus! I'm planning on installing one in the basement, near the gas boiler as well. Should have done that years ago, as we would have likely received an earlier "heads-up" that there was a combustion problem with the boiler. One last note: You can remote wall-mount this unit also. Cool feature! If you look at the last picture that I posted with this review, you can see that when the rear access cover is removed to access the backup battery, there is extra cord stored on the opposite side of the battery. The connected main power source plug can be easily removed and relocated/extended, via the corded connection, in order to have the CO detector located somewhere other than directly plugged into the power source. There is also a handy little clear plastic packet included, containing two wood/mounting screws and two wall mount plastic expanding inserts. (Not shown in picture.) Just can't say enough good stuff about this unit. Very pleased with it! ... show more
Reviewed in the United States on April 28, 2024 by AJ AJ

  • Inexpensive insurance.
Size: 1 Pack Color: White
I have a number of these throughout our house. They have worked flawlessly. They alerted once when a carpet cleaner turned on his generator while his vehicle was inside our garage. Numbers were high enough that the fire department ventilated our house. Could have been a disaster had they not alerted us. This purchase replaced a similar one that failed after many years. Made in Mexico now, but I expect the same performance. Battery backup is important to me as we experience frequent power failures. ... show more
Reviewed in the United States on January 20, 2026 by Kindle Customer

  • Supplemental Protection for home
Size: 2 Pack Color: White
Okay product however the Tech support by Kidde is not very helpful -! Last purchase lasted almost exactly 10 years bought additional replacement Carbon Monoxide & fire alarms for home after seeking advise from Kidde Tech support however not pleased with some misinformation provided and no return call as requested was ever received from Kidde! ... show more
Reviewed in the United States on January 2, 2026 by Rick

  • Easy to use, seems to work well
Size: 1 Pack Color: White
Very simple, put battery in and plug it in. Shows 0 unless it encounters carbon monoxide, then it will give you a number to tell you how much. Has been on 0 for over a year so I assume my environment is and has been clear.
Reviewed in the United States on November 20, 2025 by watcher

  • One of my favorite CO detectors...........
Size: 2 Pack Color: White
You need a CO detector in every level of your home. I like these detectors because they have a digital readout, a reset button and a "peak level" button. I have used these detectors for years. You plug them into a wall socket and they have a 9V battery backup that is very useful during power failures. You can't go wrong with this CO detector. I have used many different detectors in the past because I teach a course about CO and I want to suggest good CO detectors to my students. ... show more
Reviewed in the United States on January 25, 2026 by Bravo

  • absolutly essential for a safer home .
Size: 2 Pack Color: White
I got these mainly cause I live alone and 70 yrs old. I installed them as per instructions . Then tested them , I would like to say they meet any and all expectations I had about them. I can surely reccommend them to someone in need of a device like this for your protection .
Reviewed in the United States on January 2, 2026 by Gary R.

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