Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3
Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3
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Kidde Nighthawk Plug-In AC/DC Carbon Monoxide Alarm Detector with Digital Display KN-COPP-3

4.5 stars out of 239 reviews
(4.5)|
239 ratings

Key item features

  • Advanced Sensor Technology: Utilizes sophisticated electronic components and unmatched sensor technology to detect carbon monoxide levels.
  • Digital Display: Features a digital display that shows CO levels from 30-999 PPM, updated every 15 seconds for easy monitoring.
  • Peak Level Memory: Includes a peak level button that displays the highest CO level recorded since the last reset or unplugging.
  • Battery Backup: Equipped with a 9V battery backup to ensure continuous monitoring during power outages.
  • Multiple Mounting Options: Offers versatile installation options including direct-plug, a 6-foot power cord, or tabletop placement.
  • Audio Alarm: Emits an 85dB alarm at 10 feet to alert you of dangerous CO levels.
  • Compact Design: Measures 6.0625L x 3.75W x 1.75H inches and weighs 1lb, fitting easily into any AC wall outlet.
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Current price is $42.94
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Customer ratings & reviews

4.5 out of 5 stars
stars239 ratings88 reviews
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Reviews summary

Pros
  • : Offers fair value for its features and brand.
  • : Setup process requires minimal effort.
  • : Made with high-quality materials.
  • : Plugs into an unused outlet for easy use.
Neutral
  • : Can last several hours, but may drain quickly in some cases.
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Showing 1-3 of 88 reviews

Oct 25, 2024
Jordan
Item details
Configuration: New
5 out of 5 stars review

Verified Purchase

Works great, digital readout is a great comfort

I worry a lot about CO poisoning with my family as we have gas heat, hot water and oven, along with fireplaces. I would never buy a detector without the digital readout again. It's good peace of mind since it can show you elevated CO levels well before they get to problematic levels and before they reach sustained levels that would cause other detectors to start alerting.

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Jan 1, 2026
Cecilie
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

I found out how ignorant I have become again. Tending to think of these meeters as non-exhaustable. I was WRONG! I learned these carbon monoxide detectors do expire. Essential for my life style, I must have a reliable product. I replaced two of these alarms. My worries are now assauged. I certainly sleep better each night. HIGHLY, HIGHLY recommended. These are lifesaving devices which we should be tenacious about expiration dates as we are for a carton of milk.

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reply from Kidde Expert

Thank you for sharing this, Cecile!

Apr 6, 2025
John
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Great unit that preforms as promised

This is a great Co2 detector. They last for 10 years from date of first use so I am replacing my old unit that just expired, with an identical new unit. The permanent bright display is always visible and east to read. Very reliable unit that every home should have. Can be installed in 5 minutes and easy to test monthly.

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