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expired Posted by odbal • Nov 30, 2021
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expired Posted by odbal • Nov 30, 2021

Kidde Nighthawk Digital Carbon Monoxide/Gas/Propane Detector w/ Battery Backup

+ Free S/H

$30

$40

25% off
Amazon
22 Comments 14,335 Views
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Deal Details
Amazon has Kidde Nighthawk Digital Display Carbon Monoxide/Gas/Propane Detector w/ Battery Backup on sale for $29.99. Shipping is free.

Thanks to community member odbal for finding this deal

Note, must be sold/shipped by Amazon

About the Product
  • Easy installation
  • CO detector with digital display & alert modes; 85 decibel alarm alerts of fire
  • Electrochemical sensor technology - detects carbon monoxide & other forms of combustible gas such as propane & natural gas
  • Combo smoke and gas alarm is powered by a 120VAC wall outlet w/ 9V battery backup
  • Low battery warning feature indicates when the battery needs replacement
  • UL Certified
  • Two alarms in one detects carbon monoxide and explosive gas
  • Three convenient mounting options
Warranty
  • Includes a 5-years limited warranty w/ purchase of this product

Editor's Notes

Written by Discombobulated | Staff
  • Price Research: Purchase this unit today and save $10 Off (25.01% Savings) from the original list price of $39.99. This product recently dropped in price and we haven't seen it this low in years
  • The Kiddie offers a continuous digital display that shows you the level of carbon monoxide (if any) as well as sensing if gas is present; the gas sensor is a metal oxide sensor designed to detect natural gas (methane) or propane
  • Product is returnable until January 31, 2022
  • Offer valid while promotion/supplies last
Additional Note

Original Post

Written by odbal
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Amazon has Kidde Nighthawk Digital Display Carbon Monoxide/Gas/Propane Detector w/ Battery Backup on sale for $29.99. Shipping is free.

Thanks to community member odbal for finding this deal

Note, must be sold/shipped by Amazon

About the Product
  • Easy installation
  • CO detector with digital display & alert modes; 85 decibel alarm alerts of fire
  • Electrochemical sensor technology - detects carbon monoxide & other forms of combustible gas such as propane & natural gas
  • Combo smoke and gas alarm is powered by a 120VAC wall outlet w/ 9V battery backup
  • Low battery warning feature indicates when the battery needs replacement
  • UL Certified
  • Two alarms in one detects carbon monoxide and explosive gas
  • Three convenient mounting options
Warranty
  • Includes a 5-years limited warranty w/ purchase of this product

Editor's Notes

Written by Discombobulated | Staff
  • Price Research: Purchase this unit today and save $10 Off (25.01% Savings) from the original list price of $39.99. This product recently dropped in price and we haven't seen it this low in years
  • The Kiddie offers a continuous digital display that shows you the level of carbon monoxide (if any) as well as sensing if gas is present; the gas sensor is a metal oxide sensor designed to detect natural gas (methane) or propane
  • Product is returnable until January 31, 2022
  • Offer valid while promotion/supplies last
Additional Note

Original Post

Written by odbal

Community Voting

Deal Score
+32
Good Deal
Visit Amazon

Price Intelligence

Model: Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In with Battery Backup, Digital Display , White

Deal History 

Sort: Most Recent
Post Date Sold By Sale Price Activity
08/19/24Amazon$38
2
11/22/21Amazon$30
1
04/20/20Amazon$36
3
12/14/19Amazon$36
1

Current Prices

Sort: Lowest to Highest | Last Updated 7/5/2025, 12:59 PM
Sold By Sale Price
Amazon$53.07

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21 Comments

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Dec 1, 2021
1 Posts
Joined Apr 2010
Dec 1, 2021
michael00baker
Dec 1, 2021
1 Posts
No can do with the explosive gas detector. After my dinner of Bush's baked beans I'll be setting that thing off all night long!
5
4
Dec 1, 2021
73 Posts
Joined Jul 2016
Dec 1, 2021
sanden222
Dec 1, 2021
73 Posts
Quote from michael00baker :
No can do with the explosive gas detector. After my dinner of Bush's baked beans I'll be setting that thing off all night long!
Taco alarm bell
3
4
Dec 1, 2021
1,988 Posts
Joined Dec 2006
Dec 1, 2021
bob151
Dec 1, 2021
1,988 Posts
Thanks, I had no awareness of the prior hot deal. Used chase rewards for $15 off as well.
Dec 1, 2021
1,256 Posts
Joined Nov 2007
Dec 1, 2021
gerf
Dec 1, 2021
1,256 Posts
These are very sensitive and detect minuscule leaks. The local HVAC wouldn't come out until the FD checked everything. One pipe needed tightened was all.

It's a good peace of mind.
Dec 1, 2021
6,371 Posts
Joined May 2009
Dec 1, 2021
jkloisdafoiwdaf
Dec 1, 2021
6,371 Posts
Be aware that CO is lighter than air and propane is heavier than air. It can detect multiple kind of gas, but probably not at the same time because of its placement
Dec 1, 2021
1,740 Posts
Joined Sep 2005
Dec 1, 2021
livingaboard
Dec 1, 2021
1,740 Posts
I had an explosive gas detector upstairs many years ago. Turned out my then wife was an alcoholic. I decided to pour out all the alcohol we had in the kitchen sink downstairs. There was so much alcohol in the house that I poured out, that the explosive gas detector upstairs went off about halfway through emptying all the bottles. And the sink was draining the entire time. Crazy.
Dec 1, 2021
1,527 Posts
Joined Sep 2006
Dec 1, 2021
my3cents
Dec 1, 2021
1,527 Posts
Quote from jkloisdafoiwdaf :
Be aware that CO is lighter than air and propane is heavier than air. It can detect multiple kind of gas, but probably not at the same time because of its placement
But if you have gas heat or a gas stove or oven, natural gas is mostly methane, which is also lighter than air (and lighter than carbon monoxide also). I think that nearly all apartments, and many private homes, are more likely to have natural gas on premises than would have propane.

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Dec 1, 2021
681 Posts
Joined May 2010
Dec 1, 2021
MEB
Dec 1, 2021
681 Posts
Didn't know there was a difference between CO and gas as far as detectors go I thought CO detector would sense gas. We are switching from electric to gas range so I just bought 2 of these. One for the furnace and one for the kitchen. Thanks.
Dec 1, 2021
1,218 Posts
Joined Nov 2018
Dec 1, 2021
b-t-1
Dec 1, 2021
1,218 Posts
This WILL detect fart gas. I'm not making a joke. False alarms will be a constant nuisance.
1
Dec 1, 2021
681 Posts
Joined May 2010
Dec 1, 2021
MEB
Dec 1, 2021
681 Posts
Quote from b-t-1 :
This WILL detect fart gas. I'm not making a joke. False alarms will be a constant nuisance.
So best place it where you won't fart like furnace or behind the oven.
Original Poster
Dec 1, 2021
1,026 Posts
Joined Feb 2010
Dec 1, 2021
odbal
Original Poster
Dec 1, 2021
1,026 Posts
Quote from jkloisdafoiwdaf :
Be aware that CO is lighter than air and propane is heavier than air. It can detect multiple kind of gas, but probably not at the same time because of its placement
CO is very, very slightly lighter than air...a difference of less than half the molecular weight of hydrogen, the lightest known gas. In the face of all other environmental variables (air flow, temperature variances, humidity, etc), that difference becomes arguably one of the least contributing factors to where CO travels. It would be more accurate to say that CO usually diffuses with air. As for whether one location is perfect for this to detect both gases with equal effectiveness, I agree that there may not be one. Personally, I use it for its explosive gas abilities...CO detection is secondary to my primary units throughout the house. That said, if this is plugged into a kitchen outlet above a countertop, it would be well-positioned to catch either explosive gas leaks or CO from the stove. Same with a mid-wall outlet near a hot water heater in a garage.

Definitely shouldn't be one's only line of defense for CO detection, but should absolutely be incorporated on top of other CO detectors for its explosive gas detection.
Last edited by odbal December 1, 2021 at 01:26 AM.
Dec 1, 2021
86 Posts
Joined Aug 2013
Dec 1, 2021
LakeN4302
Dec 1, 2021
86 Posts
Quote from b-t-1 :
This WILL detect fart gas. I'm not making a joke. False alarms will be a constant nuisance.
You got such an atomic fart!!! That's WMD. You will need a Dick Cheney / Bush Jr. detector.
2
Dec 1, 2021
3,694 Posts
Joined Jul 2019
Dec 1, 2021
94c107ea-869c-45a5-becd-c6b552
Dec 1, 2021
3,694 Posts
One FF post and now everyone suddenly needs 'explosive gas detector', laugh out loud
Dec 1, 2021
823 Posts
Joined Oct 2018
Dec 1, 2021
dmcccdmn
Dec 1, 2021
823 Posts
Price junped up by $2

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Original Poster
Dec 1, 2021
1,026 Posts
Joined Feb 2010
Dec 1, 2021
odbal
Original Poster
Dec 1, 2021
1,026 Posts
Quote from dmcccdmn :
Price junped up by $2
Ugh! So it did! Those fools...right when the product hits FP on SD. Hopefully they swing back the other way if they see sales tapering off.

Given the timing, it may have been set to go up on Dec 1.

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