Internet #100045210

Model # 21027424

Store SKU #201001

Store SO SKU #1000497008

0784908007605

Plug-in Carbon Monoxide Detector with 9V Battery Backup and Digital Display

  • Carbon monoxide alarm plugs directly into wall outlet
  • 9V battery backup for protection even during power outages
  • Digital display updates CO level in PPM every 15 seconds
$ 39 97
Loading Options
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

Frequently Bought Together

Product Overview

The Silent Killer: Potential Carbon Monoxide, Sources in Your Home
Potential Causes of CO 2
  • Carbon monoxide alarm plugs directly into wall outlet
  • 9V battery backup for protection even during power outages
  • Digital display updates CO level in PPM every 15 seconds
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 85dB 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.Shop all Kidde Smoke Detectors here.
  • Plug-in carbon monoxide detector with digital readout
  • 85dB 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



  • Carbon monoxide detector utilizes an electrochemical sensor to detect fire hazards and sounds an 85 db alarm when a hazard is detected
  • *Check with your state and local fire and Building/Safety codes for specific information regarding smoke & Carbon Monoxide Alarms.
  • Shop all Kidde Carbon Monoxide Detectors
  • Click here for more information on Electronic Recycling Programs

Product Overview

  • Carbon monoxide alarm plugs directly into wall outlet
  • 9V battery backup for protection even during power outages
  • Digital display updates CO level in PPM every 15 seconds
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 85dB 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.Shop all Kidde Smoke Detectors here.

  • Plug-in carbon monoxide detector with digital readout
  • 85dB 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



  • Carbon monoxide detector utilizes an electrochemical sensor to detect fire hazards and sounds an 85 db alarm when a hazard is detected
  • *Check with your state and local fire and Building/Safety codes for specific information regarding smoke & Carbon Monoxide Alarms.
  • Shop all Kidde Carbon Monoxide Detectors
  • 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.

Key Features

The Silent Killer: Potential Carbon Monoxide, Sources in Your Home
Potential Causes of CO 2
The Silent Killer: Potential Carbon Monoxide, Sources in Your Home
Potential Causes of CO 2
Product Overview
Key Features
The Silent Killer: Potential Carbon Monoxide, Sources in Your Home
Potential Causes of CO 2
  • Carbon monoxide alarm plugs directly into wall outlet
  • 9V battery backup for protection even during power outages
  • Digital display updates CO level in PPM every 15 seconds
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 85dB 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.Shop all Kidde Smoke Detectors here.
  • Plug-in carbon monoxide detector with digital readout
  • 85dB 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



  • Carbon monoxide detector utilizes an electrochemical sensor to detect fire hazards and sounds an 85 db alarm when a hazard is detected
  • *Check with your state and local fire and Building/Safety codes for specific information regarding smoke & Carbon Monoxide Alarms.
  • Shop all Kidde Carbon Monoxide Detectors
  • Click here for more information on Electronic Recycling Programs

Product Overview

  • Carbon monoxide alarm plugs directly into wall outlet
  • 9V battery backup for protection even during power outages
  • Digital display updates CO level in PPM every 15 seconds
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 85dB 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.Shop all Kidde Smoke Detectors here.

  • Plug-in carbon monoxide detector with digital readout
  • 85dB 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



  • Carbon monoxide detector utilizes an electrochemical sensor to detect fire hazards and sounds an 85 db alarm when a hazard is detected
  • *Check with your state and local fire and Building/Safety codes for specific information regarding smoke & Carbon Monoxide Alarms.
  • Shop all Kidde Carbon Monoxide Detectors
  • 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.

The Silent Killer: Potential Carbon Monoxide, Sources in Your Home
Potential Causes of CO 2

Compare Similar

Compare Similar Products
Brand Kidde Kidde Kidde Kidde
Name Hardwire Carbon Monoxide Detector with 9V Battery Backup Battery Operated Carbon Monoxide Detector (2-pack) Plug-in Carbon Monoxide Detector with 9V Battery Backup and Digital Display Code One Battery Operated Carbon Monoxide Detector (6-pack)
Price
$29.97
$34.97 /bundle
$39.97
Was $101.85
$81.48 /bundle
Save $20.37 (20%)
Ratings (117) (997) (364) (997)
Power Source Hardwired Battery Plug-In Battery
Alarm/Detector Features Battery Back-Up,Hush Feature,Interconnected Hush Feature,Value Pack Battery Back-Up,Digital display,Hush Feature Hush Feature,Tamper Resistant,Value Pack
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, if the display says end. That means that the unit has reached the end of its life.
Answered by: Don
Date published: 2019-01-10

When this is plugged in, can you use the other plug for something else?

When this is plugged in, can you use the other plug for something else?
Asked by: Lillie
The other outlet can be used while the detector is in use. Follow safety rules as indicated for the additional appliance.
Answered by: TheAmerican
Date published: 2019-07-03

Does the battery need to be changed it is plug into wall.

Does the battery need to be changed it is plug into wall.
Asked by: None
Yes, because if you have power failure, your carbon monoxide detector will still be operational.
Answered by: Scrap
Date published: 2019-04-09

I don't know but it have to to be 0. That's normal?

Asked by: Adina
Read the owners manual. You can download a manual here: https://www.utcccs-cdn.com/hvac/docs/2001/Public/0B/900-0076.pdf.pdf (.pdf is duplicated, this is correct) The unit should read '0' under normal circumstances. It may read 30-50, considered low level, but should be of short duration. Read the manual for possible contamination scenarios. Any reading above '0' should be taken seriously, call a HVAC technician, vent the room as much as possible.
Answered by: theAmerican
Date published: 2019-02-24
  • y_2019, m_10, d_15, h_3CST
  • bvseo_bulk, prod_bvqa, vn_bulk_2.0.13
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_49
  • 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, 17ms
  • QUESTIONS, PRODUCT

Customer Reviews

Kidde Plug-in Carbon Monoxide Detector with 9V Battery Backup and Digital Display is rated 4.7 out of 5 by 364.
Rated 5 out of 5 by from Trouble free Does what it's supposed to do. Good battery life although unit will shut down automatically after about 8 years
Date published: 2014-02-11
Rated 2 out of 5 by from Defective ok, brought this product in January or Feb of 2014 after my first have showed the ERR message. The first CM lasted 7 years, so replaced with same. Only this time every 2-3 weeks it beeps and shows low battery, replaced the battery each time, long story short after 4-5 months I have replaced the battery several times. Called the company told them the problem, first thing he told me when he asked where I had it, I said the livingroom, he stated "they don't normally recommend it being in LR". Stated I had the last one the same place. Now I am awaiting the replacement from Kidde. Year made is July 2013.
Date published: 2014-05-30
Rated 1 out of 5 by from I have changed the battery twice but it 'chirps' after a week or two. I even had the professiona... I have changed the battery twice but it 'chirps' after a week or two. I even had the professionals out to check for problems with the boiler which came out perfect.
Date published: 2017-01-03
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 Nighthawk Carbon Monoxide Detector I bought two of these 8 years ago. One the same day, eight years later, BOTh units displayed an ERR msg which indicates they no longer work and need to be replaced. They obviously have some sort of "self destruct" built in. I don't believe it's a coincidence they died on the same day. Needless to say, it's a necessary item and worked fine for 8 years, so I'll likely buy two more.
Date published: 2013-01-09
Rated 5 out of 5 by from I searched through tons of carbon monoxide detectors before deciding to get the Kidde plug in car... I searched through tons of carbon monoxide detectors before deciding to get the Kidde plug in carbon monoxide alarm with digital display. I read all the reviews too, and liked most of them. I bought this one because it has the digital reading at a glance that shows if there is any carbon monoxide in the air, plus it has battery backup should the power go out. I have a multi level home so bought two of these, one nearer to the room adjacent to the propane furnace, and one on the second level up. This gives me so much piece of mind! I'm so happy I bought it!
Date published: 2018-05-12
Rated 5 out of 5 by from As I just purchased this unit I can't say how... As I just purchased this unit I can't say how long it will last. Appears to be solidly made. Manufactured Dec 2018. Readout is sharp and clear. The CO sensor is behind the "N" opening. Can leave the plug built into the unit or stretch out a wire to place the unit on a nearby wall. This unit replaces a reliable older Nighthawk, about 10 years old, the recommended life span. If it does not work properly I will update this review.
Date published: 2019-05-24
Rated 5 out of 5 by from Like the battery backup Our previous CO detector lasted for seven years and we bought this one as a replacement. We have it plugged in, but am glad that it has a battery backup. This would be an ideal gift for a new home owner.
Date published: 2010-09-04
Rated 4 out of 5 by from Excellent and easy to install Highly rated product, easy to install and forget. The LED indicator is easy to see and always registers a safe number making me feel safe in my home.
Date published: 2011-04-30
Rated 1 out of 5 by from Disappointed - save your receipt Unit malfunctioned after 3 yrs. Of course I don't still have the receipt. Regardless, read all you have to do to invoke the warranty!
Date published: 2014-04-24
Rated 5 out of 5 by from Easy to unpack, to understand the info, to set it up and simply plug it in. I like to see the CO ... Easy to unpack, to understand the info, to set it up and simply plug it in. I like to see the CO reading displayed, and to be able to see it in the dark, and across the room. Very nice.
Date published: 2019-05-25
Rated 5 out of 5 by from Reliable CO Detector Have faithfully used this alarm for seven years. Like its ability to indicate the amount of carbon dioxide in the air. When needed, was able to obtain help from the listed 800 phone number. When and if this detector fails, I would not hesitate to replace it with the same model.
Date published: 2010-02-15
Rated 5 out of 5 by from This is a replacement for the one I originally bought... This is a replacement for the one I originally bought shortly after I moved into my current residence. The first one reached the end of it's useful life. I have never had any problems with it giving nuisance alarms. It sat quietly and did what it is designed to do, moniter the air for carbon monoxide. I am well pleased with it and look forward to another 8 years of protection. It is a great value for guarding against carbon monoxide poisioning or death. If you have a family that you want to protect from the effects of improper combustion associated with natural gas or the possibilty of car exhaust getting into your house, purchase this and have peace of mind that everyone is protected.
Date published: 2018-03-13
Rated 5 out of 5 by from Have used previous monitoring system by middle and have been more than satisfied, I am sure this... Have used previous monitoring system by middle and have been more than satisfied, I am sure this one will work as well if not better.
Date published: 2019-04-23
Rated 5 out of 5 by from Battery backup included. Just plug it in and rest... Battery backup included. Just plug it in and rest assured that you are protected from carbon monoxide levels at all times!
Date published: 2019-05-14
Rated 5 out of 5 by from The co detector was without a doubt the best... The co detector was without a doubt the best thing I purchased because i have one already.
Date published: 2019-06-18
Rated 5 out of 5 by from Very happy with the plug in carbon monoxide detector. Easy... Very happy with the plug in carbon monoxide detector. Easy to set up and then just plug in.
Date published: 2019-06-04
Rated 5 out of 5 by from So far I’m pleased with this unit. Fits nicely in... So far I’m pleased with this unit. Fits nicely in wall and has an easy read display.
Date published: 2019-06-11
Rated 3 out of 5 by from You should stock duel carbon monoxide and explosive gas detectors.... You should stock duel carbon monoxide and explosive gas detectors.
Date published: 2019-06-25
Rated 5 out of 5 by from Replaced existing meter and the new one worked just... Replaced existing meter and the new one worked just fine.
Date published: 2019-04-24
Rated 5 out of 5 by from This is the second one that I have bought. It is easy to install and tells you when the battery n... This is the second one that I have bought. It is easy to install and tells you when the battery needs to be replaced and also when the unit needs to be replaced as in my case this is what happened. The word "END" appeared and reading the back of the unit it tells you that when the word "END" appears the unit is done.
Date published: 2018-11-01
Rated 4 out of 5 by from To early to tell. Appears to be working To early to tell. Appears to be working
Date published: 2019-05-29
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-07-03
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-05-01
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-05-22
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-07-03
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-05-22
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-05-01
Rated 5 out of 5 by from 5 Star Review Rating provided by a verified purchaser
Date published: 2019-05-15
Rated 5 out of 5 by from It was a replacement for my old one. It was a replacement for my old one.
Date published: 2019-06-11
  • y_2019, m_10, d_15, h_3
  • bvseo_bulk, prod_bvrr, vn_bulk_2.0.13
  • cp_3, bvpage2n
  • co_hasreviews, tv_1, tr_363
  • loc_, sid_100045210, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_homedepot
  • bvseo_sdk, java_sdk, bvseo-3.1.1
  • CLOUD, getContent, 51ms
  • REVIEWS, PRODUCT