Model # 21027424

Internet #100045210

Store SKU #201001

Store SO SKU #198092

Kidde Plug-In Carbon Monoxide Alarm with Digital Display and 9-Volt Backup
0784908007605

Kidde

Plug-In Carbon Monoxide Alarm with Digital Display and 9-Volt Backup

  • Plugs directly into AC wall out for easy installation
  • UL # KN-COPP-3
  • Battery back up
$4397 /each
store icon Loading Buying Options...
package icon Loading Buying Options...
Sorry, but we ran into issues loading these options. Please try refreshing.

Frequently Bought Together

Product Overview

The Silent Killer: Potential Carbon Monoxide, Sources in Your Home
Potential Causes of CO 2
  • Plugs directly into AC wall out for easy installation
  • UL # KN-COPP-3
  • Battery back up
The digital readout of the Kidde Plug-In Digital Carbon Monoxide Alarm with 9-Volt Backup continuously displays carbon monoxide levels from 30 to 999 parts per million (PPM) and will sound an 85 dB alarm when dangerous levels are reached. The carbon monoxide level sensed is continuously displayed and updated every 15 seconds, and the peak level memory shows the highest level of carbon monoxide present since the last time the unit was reset or unplugged. Protection continues during power outages thanks to a 9-volt battery backup.
  • Plug-in carbon monoxide detector with digital readout
  • 85 dB alarm sounds when carbon monoxide reaches dangerous levels so you can protect your family
  • Test/reset button to check for proper operation and reset the unit
  • 9-volt battery backup provides protection during power outages
  • Displays carbon monoxide levels from 30 to 999 PPM
  • Updates digital reading every 15 seconds
  • Peak level memory displays highest carbon monoxide level recorded since previous reset or unplugging
  • Plugs into AC receptacles
  • Note: Product may vary by store
  • UL/CSFM Ref. Kidde Part KN-COPP-3
  • Click here for more information on Electronic Recycling Programs

Product Overview

  • Plugs directly into AC wall out for easy installation
  • UL # KN-COPP-3
  • Battery back up
Model #: 21027424
Sku #: 201001
Internet #: 100045210

The digital readout of the Kidde Plug-In Digital Carbon Monoxide Alarm with 9-Volt Backup continuously displays carbon monoxide levels from 30 to 999 parts per million (PPM) and will sound an 85 dB alarm when dangerous levels are reached. The carbon monoxide level sensed is continuously displayed and updated every 15 seconds, and the peak level memory shows the highest level of carbon monoxide present since the last time the unit was reset or unplugged. Protection continues during power outages thanks to a 9-volt battery backup.

  • Plug-in carbon monoxide detector with digital readout
  • 85 dB alarm sounds when carbon monoxide reaches dangerous levels so you can protect your family
  • Test/reset button to check for proper operation and reset the unit
  • 9-volt battery backup provides protection during power outages
  • Displays carbon monoxide levels from 30 to 999 PPM
  • Updates digital reading every 15 seconds
  • Peak level memory displays highest carbon monoxide level recorded since previous reset or unplugging
  • Plugs into AC receptacles
  • Note: Product may vary by store
  • UL/CSFM Ref. Kidde Part KN-COPP-3
  • Click here for more information on Electronic Recycling Programs

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Customers Also Compared These

Price
$26.97 /each
$43.97 /each
$49.97 /each
$59.97 /each
Name Plug In Carbon Monoxide Alarm with Battery Back-Up Plug-In Carbon Monoxide Alarm with Digital Display and 9-Volt Backup 10 Year Worry Free Plug-In CO Alarm for Living Area 10 Year Worry Free Plug-In CO Alarm for Hallway
Brand Kidde Kidde Kidde Kidde
Ratings (48) (129) (71) (71)
Power Source Plug-In Plug-In Plug-In Plug-In
Alarm/Detector Features Battery Back-Up Battery Back-Up,Digital display,Hush Feature 10-Year Battery,Battery Back-Up,Digital display,Hush Feature,Tamper Resistant 10-Year Battery,Battery Back-Up,Digital display,Escape Light,Hush Feature,Tamper Resistant
View Product View Product View Product View Product

Specifications

Dimensions

Product Depth (in.)
1.9
Product Height (in.)
6
Product Width (in.)
3.5

Details

Alarm Type
Carbon Monoxide
Alarm/Detector Features
Battery Back-Up,Digital display,Hush Feature
Battery Back-Up
Yes
Commercial / Residential
Commercial / Residential
Connector/Contact Type
None
Included
Batteries
Pack Size
1
Power Source
Plug-In
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Certifications and Listings
1-UL Listed

Specifications

Dimensions

Product Depth (in.)
1.9
Product Height (in.)
6
Product Width (in.)
3.5

Details

Alarm Type
Carbon Monoxide
Alarm/Detector Features
Battery Back-Up,Digital display,Hush Feature
Battery Back-Up
Yes
Commercial / Residential
Commercial / Residential
Connector/Contact Type
None
Included
Batteries
Pack Size
1
Power Source
Plug-In
Returnable
90-Day
Voltage (volts)
120

Warranty / Certifications

Certifications and Listings
1-UL Listed

Questions & Answers

Does this ever need to be replaced?

It won't stop beeping like every 30 seconds.
Asked by: Michele
yes indeed. in seven years. i bought mine in 2010 (this unit) now its 2017 and the word "end" appears on the digital readout which means the unit is kaput!
Answered by: Rosemary
Date published: 2017-09-29

Where is the best place to install the alarm. I have mine in the kitchen. Should it be in the hall way??

Asked by: Bunny
The best place to put a CO alarm is in your bedroom. If it goes off, you want to be sure it wakes you up; even from a deep sleep.
Answered by: FireProof
Date published: 2017-07-14

I have LP propane gas heat in my house. Will this detector sense any a gas leak near the unit?

I have LP gas. Would this sensor pick up if there is any leakage of gas in the area? I don't know if the off put of LP gas is carbon Monoxide.
Asked by: questioner
I think you're asking two different questions. If you have a model that detects combustible gasses as well as CO, then yes it will detect leaking natural gas and LP gas. Carbon monoxide (CO) is the same, no matter what is burning. CO is produced by incomplete combustion of anything flammable.
Answered by: FireProof
Date published: 2017-01-04

What would happen if you did not connect a battery to the alarm detector? Would it automatically sense LOW BATTERY and continously beep?

Asked by: Doctor
Yes
Answered by: FireProof
Date published: 2017-01-04
  • y_2017, m_10, d_15, h_21CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_28
  • loc_, sid_100045210, prod, sort_[SortEntry(order=NUM_ANSWERS, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING), SortEntry(order=BEST_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=POSITIVE_ANSWER_FEEDBACK_COUNT, direction=DESCENDING), SortEntry(order=NUM_ANSWERS, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 101ms
  • QUESTIONS, PRODUCT

Customer Reviews

Plug-In Carbon Monoxide Alarm with Digital Display and 9-Volt Backup is rated 4.6 out of 5 by 129.
Rated 5 out of 5 by from Let me first say that I'm a firefighter. I respond to literally hundreds of calls each year for ... Let me first say that I'm a firefighter. I respond to literally hundreds of calls each year for "Carbon Monoxide Alarm Sounding". In a very small percentage of these calls we find CO, verified by very accurate monitors that we carry. The remainder of the calls are caused by, in order of frequency, dead batteries, expired detectors, or malfuncioning detectors. Please don't misunderstand me; CO is deadly and every time your CO detector goes off it should be taken as a true finding. Get out of the home and call 911. With that said, replace your batteries twice a year, replace your detector when the manufacturer says, and buy this detector. I can't remember the last time I found a Nighthawk that was wrong about CO. It's what I have in my house.
Date published: 2017-01-03
Rated 5 out of 5 by from Easy and Reliable CO Alarm I have owned various versions of this trusty alarm for many years. Never had a problem. Pretty much idiot-proof. It is simple to install, and then you can forget about it unless there is a carbon monoxide issue. I have always tested mine by covering them with a large plastic bowl and then blowing a few puffs from a cigarette into the bowl. Sure enough, the display showed a slight amount of carbon monoxide. This unit can be plugged into a wall socket, or the internal cord can be released so that it can rest on a table, or can be mounted higher on a wall. With the battery back-up, this is a great little device that just might save your life someday, so get several and keep at least one close to where you sleep.
Date published: 2017-09-12
Rated 4 out of 5 by from Great CO detector. I always perform strenuous research on life safety items, as I myself have in... Great CO detector. I always perform strenuous research on life safety items, as I myself have interacted with many different types of gas detector during the course of my career. This CO detector is easy to install, operate, read CO levels, and just daily interaction with device. I chose to wall-mount mine and have received numerous compliments from friends and neighbors (the ones I allow to view my homes mechanical center that is). Only reason I did not give the Kidde KN-COPP-3 5-stars is the top keyhole mount is part of the battery/power cord access door and does not, in my opinion, make for the most solid wall-mount configuration. Other than that one simple observation this is a great CO detector, and it compliments my Kidde i4618 smoke detectors and Kidde KN-COSM-IB combo smoke/CO detectors that are installed in the bedrooms and hallways of my home.
Date published: 2017-09-13
Rated 5 out of 5 by from I bought this CO alarm as a replacement for the same model that ended its 10 year life expectancy... I bought this CO alarm as a replacement for the same model that ended its 10 year life expectancy (according to the alarm's digital readout). I was so pleased that Home Depot still carried this same model 10 years later! I like that it was reasonably priced, that it can be plugged into a wall outlet and it also works during power outages when used with a 9V battery.
Date published: 2017-10-03
Rated 5 out of 5 by from This is a replacement of the exact same model that... This is a replacement of the exact same model that I had previously. Lasted just over seven years before it expired. Like that it has a digital readout of the CO level and retains the highest level recorded. Will be buying one for my daughters condo as her CO detector also just expired.
Date published: 2017-09-26
Rated 5 out of 5 by from Alarm was easy to install, just add battery and plug in. Make sure to write the date you install ... Alarm was easy to install, just add battery and plug in. Make sure to write the date you install for your records and when to replace. I feel confident that my family and I will be alerted to any problems with Carbon Monoxide buildup in our home in a timely manner!
Date published: 2017-08-20
Rated 4 out of 5 by from Of course, final rating will depend on how long it... Of course, final rating will depend on how long it lasts…. and alerts us to the presence of CO. It was easily assembled, so the directions were straightforward and easily understood. That in itself is a huge recommendation!
Date published: 2017-07-25
Rated 4 out of 5 by from This was a replacement unit. The original lasted the advertised time so I have no reason to be un... This was a replacement unit. The original lasted the advertised time so I have no reason to be unhappy. It is a simple plug and play system and does all I expected.
Date published: 2017-08-01
  • y_2017, m_10, d_15, h_21
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.3
  • cp_1, bvpage1
  • co_hasreviews, tv_1, tr_128
  • loc_, sid_100045210, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 94ms
  • REVIEWS, PRODUCT