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Kidde Plug-In Carbon Monoxide Detector w/ Battery Backup Expired
$11.85
$29.99
Update: This popular deal is back in stock again.
Amazon has Kidde Plug-In Carbon Monoxide Detector w/ Battery Backup (KN-COP-DP2) on sale for $13.04 -> now $11.84. Shipping is free with Prime or on $25+ orders.
Thanks to community member vsspam for finding this deal.
Amazon has Kidde Plug-In Carbon Monoxide Detector w/ Battery Backup (KN-COP-DP2) on sale for $13.04 -> now $11.84. Shipping is free with Prime or on $25+ orders.
Thanks to community member vsspam for finding this deal.
- Note, eligible American Express cardholders with Rewards Points may save an additional 15% off (Up to $15 max) when redeeming a minimum of one point ($0.01) towards this purchase (learn more).
- CO (carbon monoxide) detector that alerts with a warning signal against dangerous levels of carbon monoxide in your home.
- 85dB (decibel) alarm alerts of fire
- Easy & quick installation: plugs directly into your home's standard wall outlet.
- Protects during a power failure: two AA batteries (included) provide backup service in the event of a power outage.
- 120-Volt
- UL Certified
- 10-Year Limited Warranty
Original Post
Written by
Edited November 30, 2021
at 12:09 PM
Kidde Carbon Monoxide Detector, Plug In with Battery Backup, CO Detector, KN-COP-DP2 $13.04 FS w/ Amazon Prime (or $35 purchase), AC powered w/battery backup
CO detector that alerts with a warning signal against dangerous levels of carbon monoxide in your home
Easy & quick installation - plugs directly into your home's standard wall outlet, 85 decibel alarm alerts of fire
Protects during a power failure - 2-AA batteries, included with pack, provide backup service in the event of a power outage
Whole home family protection - place 1 carbon monoxide detector on each level of your home & in your bedroom to protect from poisonous gases
UL Certified, 10-year limited warranty
https://www.amazon.com/gp/product...UTF8&
Please test your carbon monoxide detectors prior to using your gas furnace.
CO detector that alerts with a warning signal against dangerous levels of carbon monoxide in your home
Easy & quick installation - plugs directly into your home's standard wall outlet, 85 decibel alarm alerts of fire
Protects during a power failure - 2-AA batteries, included with pack, provide backup service in the event of a power outage
Whole home family protection - place 1 carbon monoxide detector on each level of your home & in your bedroom to protect from poisonous gases
UL Certified, 10-year limited warranty
https://www.amazon.com/gp/product...UTF8&
Please test your carbon monoxide detectors prior to using your gas furnace.
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Deal History
Deal History includes data from multiple reputable stores, such as Best Buy, Target, and Walmart. The lowest price among stores for a given day is selected as the "Sale Price".
Sale Price does not include sale prices at Amazon unless a deal was posted by a community member.
Sale Price does not include sale prices at Amazon unless a deal was posted by a community member.
Current Prices
Sort: Lowest to Highest | Last Updated 5/10/2024, 11:36 AM| Sold By | Sale Price |
|---|---|
 Walmart | $24.84 |
 Office Depot and OfficeMax | $35.49 |
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Community Wiki
Last Edited by vsspam
December 6, 2021
at
09:01 AM
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Not sure why the post only mentions Amazon.
Same price in-store at Walmart.
https://www.walmart.com/ip/Kidde-...2/39360952
11/29 Amazon has dropped price to $11.84 (looks like to match Walmart.com price).
Link to carbon monoxide detector with digital display for $18.98 (I have one in my MBR and use the basic one for my other BRs): DEAD - NOW $29.90
Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup, Digital Display
https://www.amazon.com/Nighthawk-...00002N86A/
https://www.walmart.com/ip/Kidde-...arm/870340
Link to combined carbon monoxide and gas detector for $29.99 (I have this one next to my gas dryer): DEAD - Now $34.50
Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In with Battery Backup, Digital Display
https://www.amazon.com/Nighthawk-...0002EVNJ6/
Amazon has raised prices, but walmart.com still has for $11.84.
https://www.walmart.com/ip/Kidde-...hbdg=L1700
12/6 After raising price, Amazon has dropped price again to $11.84 to match Walmart.com.
Once a Thread Wiki is added to a thread, "Create Wiki" button will disappear. If you would like to learn more about Thread Wiki feature, click here.
Not sure why the post only mentions Amazon.
Same price in-store at Walmart.
https://www.walmart.com/ip/Kidde-...2/39360952
11/29 Amazon has dropped price to $11.84 (looks like to match Walmart.com price).
Link to carbon monoxide detector with digital display for $18.98 (I have one in my MBR and use the basic one for my other BRs): DEAD - NOW $29.90
Kidde Nighthawk Carbon Monoxide Detector, AC-Plug-In with Battery Backup, Digital Display
https://www.amazon.com/Nighthawk-...00002N86A/
https://www.walmart.com/ip/Kidde-...arm/870340
Link to combined carbon monoxide and gas detector for $29.99 (I have this one next to my gas dryer): DEAD - Now $34.50
Kidde Nighthawk Carbon Monoxide Detector & Propane, Natural, & Explosive Gas Detector, AC-Plug-In with Battery Backup, Digital Display
https://www.amazon.com/Nighthawk-...0002EVNJ6/
Amazon has raised prices, but walmart.com still has for $11.84.
https://www.walmart.com/ip/Kidde-...hbdg=L1700
12/6 After raising price, Amazon has dropped price again to $11.84 to match Walmart.com.
120 Comments
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Featured Comments
Explosive gas will not trigger carbon monoxide detectors, even at high concentrations. Usually people rely on the bad smell (like rotten eggs) that is added to natural gas/propane as a warning system. However, we have seen situations where gradual accumulation prevented detection due to nose blindness. A few years ago a man and woman came home from date night and could smell natural gas in their driveway as they pulled up. Their two teenage boys were at the back of the small house (1500 sq ft) playing video games and hadn't noticed a thing. One of them had nudged a kitchen stove burner knob and it was hissing out gas, filling the house. After that, they got one of the these alarms [amazon.com] and put it in their kitchen. Tested by leaving a burner slightly on, unlit...the alarm went off in under five minutes. I have the same unit in my own kitchen.
One last important point: if you smell gas in your house, do not start opening windows to air it out. Explosive gasses are only explosive at relatively low concentrations with air. Propane is only about 10%; methane around 15%. By the time you smell it, it's possible your concentrations could be higher than that. Opening windows could pull you back into the "danger zone". Don't ventilate; evacuate. Call the fire department. We can determine the concentrations and ventilation needs, as well as speed ventilations with fans that are low-risk for causing explosions.
Remember, as a general rule (in the US at least):
• We won't charge you for our help
• You are not bothering us
• If anything, you are probably making our day more interesting
• It is good practice for us
• We are then on-hand in case anything does explode
Alright, enough rambling from me. Be safe, everyone.
Per EPA.gov
https://www.epa.gov/indoor-air-qu...e-detector
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In my case when I asked for their help they came to the house (fire engine and a full crew).
LOL, seriously though, it is. If we take an engine out, it needs to be fully staffed (min. 3 people in my district with our engines), and we have to have all our gear so we're ready in case we get called to a fire from wherever we're at. At my station specifically, we'd have probably come with 1-2 crew members in our "Brush Rescue" (off-road pickup), just to avoid putting the engine an 3+ crew members in use. But we're a small department with only two engines and a rescue, so there may be more resources in your area (or that was just the logical crew set to go).
In my case when I asked for their help they came to the house (fire engine and a full crew).
Explosive gas will not trigger carbon monoxide detectors, even at high concentrations. Usually people rely on the bad smell (like rotten eggs) that is added to natural gas/propane as a warning system. However, we have seen situations where gradual accumulation prevented detection due to nose blindness. A few years ago a man and woman came home from date night and could smell natural gas in their driveway as they pulled up. Their two teenage boys were at the back of the small house (1500 sq ft) playing video games and hadn't noticed a thing. One of them had nudged a kitchen stove burner knob and it was hissing out gas, filling the house. After that, they got one of the these alarms [amazon.com] and put it in their kitchen. Tested by leaving a burner slightly on, unlit...the alarm went off in under five minutes. I have the same unit in my own kitchen.
One last important point: if you smell gas in your house, do not start opening windows to air it out. Explosive gasses are only explosive at relatively low concentrations with air. Propane is only about 10%; methane around 15%. By the time you smell it, it's possible your concentrations could be higher than that. Opening windows could pull you back into the "danger zone". Don't ventilate; evacuate. Call the fire department. We can determine the concentrations and ventilation needs, as well as speed ventilations with fans that are low-risk for causing explosions.
Remember, as a general rule (in the US at least):
• We won't charge you for our help
• You are not bothering us
• If anything, you are probably making our day more interesting
• It is good practice for us
• We are then on-hand in case anything does explode
Alright, enough rambling from me. Be safe, everyone.
I'm ordering based on your recommendation, thanks for the education.
Would you like to expand on that with further information? I don't disagree that it shouldn't be the only line of defense, and placement is important, but vague scary statements don't teach anybody anything.
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Explosive gas will not trigger carbon monoxide detectors, even at high concentrations. Usually people rely on the bad smell (like rotten eggs) that is added to natural gas/propane as a warning system. However, we have seen situations where gradual accumulation prevented detection due to nose blindness. A few years ago a man and woman came home from date night and could smell natural gas in their driveway as they pulled up. Their two teenage boys were at the back of the small house (1500 sq ft) playing video games and hadn't noticed a thing. One of them had nudged a kitchen stove burner knob and it was hissing out gas, filling the house. After that, they got one of the these alarms [amazon.com] and put it in their kitchen. Tested by leaving a burner slightly on, unlit...the alarm went off in under five minutes. I have the same unit in my own kitchen.
One last important point: if you smell gas in your house, do not start opening windows to air it out. Explosive gasses are only explosive at relatively low concentrations with air. Propane is only about 10%; methane around 15%. By the time you smell it, it's possible your concentrations could be higher than that. Opening windows could pull you back into the "danger zone". Don't ventilate; evacuate. Call the fire department. We can determine the concentrations and ventilation needs, as well as speed ventilations with fans that are low-risk for causing explosions.
Remember, as a general rule (in the US at least):
• We won't charge you for our help
• You are not bothering us
• If anything, you are probably making our day more interesting
• It is good practice for us
• We are then on-hand in case anything does explode
Alright, enough rambling from me. Be safe, everyone.
The best post on SD. Thank you for your service!
Our community has rated this post as helpful. If you agree, why not thank odbal
Carbon monoxide (henceforth CO) is indeed very slightly lighter than average air. By "very slightly", I mean that air's average molecular weight is 28.966 g/mol and CO's is 28.011 g/mol [stadealer.com]. That's a difference of only 0.9547 g/mol (less than half the molecular weight of hydrogen, the lightest known gas). In the absence of absolutely all other variables (air flow, humidity, temperature changes, flow path, etc), CO would indeed predictably rise in "perfectly average" air...but slowly, like pouring together two oils of slightly different density without agitation. But if you add in things like HVAC systems moving air, humidity variances, and even small pockets of differing air density/temperature, the miniscule difference in molecular weight quickly becomes one of the least influencing variables. Even just the route by which the CO is introduced to a room can greatly overpower the influence of the slight weight difference. CO doesn't just appear and begin to rise; it comes from somewhere...a malfunctioning pilot light that is "shooting" gas in a given direction (sometimes sideways); a smoldering fire in a wood stove with a slight leak in the side (air pressure jettisons the gas out laterally); a running car in a closed garage (shooting straight out from the exhaust pipe). Before the CO can even begin to slowly rise in the air, it has to overcome its initial trajectory. By the time it does, there may be more than enough to cause ill effects.
It would really be more accurate to say that CO diffuses with air, given these myriad variables. Imagine if you took two cups of water from the same source, then added blue dye to one and red dye to the other. One is obviously going to then weigh more at a molecular level (different pigments have different weights); quite possibly with greater difference than CO and air. Now, if you pour one into the other—even gently—they are going to first diffuse and make a whole lotta purple. It will take quite some time for them to then separate and create obvious layers of red and blue, and even then there will be some amount of purple along the middle.
I'm not trying to contradict the EPA, nor say that their advice isn't founded...but it's a sound byte. It's information distilled down to account for the law of averages. On average, yes, a CO detector placed higher up is more likely to activate sooner. I agree that, ideally, one of these items should not be a household's only warning system for CO leaks. But also, really read the EPA's advice [epa.gov] carefully: "Because carbon monoxide is slightly lighter than air and also because it may be found with warm, rising air, detectors should be placed on a wall about 5 feet above the floor. The detector may be placed on the ceiling." It says it may be placed on the ceiling, but should be on a wall about five feet above the floor. If one wants to follow that advice to the letter, it would be easier to use one of these devices with some slight modifications (extension cord) than to wire in a detector spot in the middle of a wall. You could stick a battery-operated unit at perfect height, of course, but those have their own problems.
I would not nearly agree with your assessment that "[l]ikely if you buy this and put it in your standard wall plug, by the time it alerts you, you're already dead." First off, if installing ceiling CO detectors is not an option (for whatever reason), this is absolutely better than nothing. Second, you've failed to take into account places where outlets aren't at standard floor level. Kitchens, for example, generally have several above the countertops. Standard counters are 36 inches high, and outlets are generally 15-20 inches above that, which would put one of these right near the 5-foot recommendation, and right in a room where CO release is a considerable risk (if there is a gas range). Many garages, too, have outlets midway up the wall, and that's where hot water heater, clothes dryer, furnace, and automobile dangers generally reside. As for near a fireplace (gas or wood), one could always attach this device to a short extension cord and mount it a little ways up the wall at an outlet in the same room as (but not too close to) the fireplace.
This got long-winded, so I'll just wrap up with this: these devices aren't nearly as useless as your assessment makes them out to be. As with any security device, care must be taken about proper implementation...and, as I have said before, no safety equipment is a replacement for situational awareness.
Explosive gas will not trigger carbon monoxide detectors, even at high concentrations. Usually people rely on the bad smell (like rotten eggs) that is added to natural gas/propane as a warning system. However, we have seen situations where gradual accumulation prevented detection due to nose blindness. A few years ago a man and woman came home from date night and could smell natural gas in their driveway as they pulled up. Their two teenage boys were at the back of the small house (1500 sq ft) playing video games and hadn't noticed a thing. One of them had nudged a kitchen stove burner knob and it was hissing out gas, filling the house. After that, they got one of the these alarms [amazon.com] and put it in their kitchen. Tested by leaving a burner slightly on, unlit...the alarm went off in under five minutes. I have the same unit in my own kitchen.
One last important point: if you smell gas in your house, do not start opening windows to air it out. Explosive gasses are only explosive at relatively low concentrations with air. Propane is only about 10%; methane around 15%. By the time you smell it, it's possible your concentrations could be higher than that. Opening windows could pull you back into the "danger zone". Don't ventilate; evacuate. Call the fire department. We can determine the concentrations and ventilation needs, as well as speed ventilations with fans that are low-risk for causing explosions.
Remember, as a general rule (in the US at least):
• We won't charge you for our help
• You are not bothering us
• If anything, you are probably making our day more interesting
• It is good practice for us
• We are then on-hand in case anything does explode
Alright, enough rambling from me. Be safe, everyone.
Thank you for the thoughtful and super helpful post! This is gold
Explosive gas will not trigger carbon monoxide detectors, even at high concentrations. Usually people rely on the bad smell (like rotten eggs) that is added to natural gas/propane as a warning system. However, we have seen situations where gradual accumulation prevented detection due to nose blindness. A few years ago a man and woman came home from date night and could smell natural gas in their driveway as they pulled up. Their two teenage boys were at the back of the small house (1500 sq ft) playing video games and hadn't noticed a thing. One of them had nudged a kitchen stove burner knob and it was hissing out gas, filling the house. After that, they got one of the these alarms [amazon.com] and put it in their kitchen. Tested by leaving a burner slightly on, unlit...the alarm went off in under five minutes. I have the same unit in my own kitchen.
One last important point: if you smell gas in your house, do not start opening windows to air it out. Explosive gasses are only explosive at relatively low concentrations with air. Propane is only about 10%; methane around 15%. By the time you smell it, it's possible your concentrations could be higher than that. Opening windows could pull you back into the "danger zone". Don't ventilate; evacuate. Call the fire department. We can determine the concentrations and ventilation needs, as well as speed ventilations with fans that are low-risk for causing explosions.
Remember, as a general rule (in the US at least):
• We won't charge you for our help
• You are not bothering us
• If anything, you are probably making our day more interesting
• It is good practice for us
• We are then on-hand in case anything does explode
Alright, enough rambling from me. Be safe, everyone.
Very informative and thanks for taking the time out to educate. Having had lived in my apartment for several years with a slow gas leak behind my kitchen wall due to an aged pipe, I was told I was living on a ticking time bomb. Never knew opening a window could be counterproductive. Thank you!
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