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First Alert SCO5CN Battery Operated Combination Carbon Monoxide/Smoke Alarm

4.2 out of 5 stars 463 customer reviews
| 33 answered questions

Price: $34.87 & FREE Shipping on orders over $49. Details
In Stock.
Ships from and sold by Amazon.com. Gift-wrap available.
1 Pack
Include installation
What's
included
  • Service provided by a local pro
  • Mounting/wiring of new detector in current location
  • Completing unit test cycle
  • See more
  • Demonstrating proper usage and maintenance

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What's included See more details
  • Service provided by a local pro
  • Mounting/wiring of new detector in current location
  • Completing unit test cycle
  • Demonstrating proper usage and maintenance
How it works
  • Pro will contact you within 1 business day to schedule
  • Kick back and only pay when the job is done
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Estimate: $57.95
86% positive ratings (14 reviews)
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  • Battery-operated combination smoke and carbon monoxide alarm
  • Photoelectric smoke sensing technology & electrochemical CO sensing technology
  • Simple to use silence/test button; low battery warning; Does not contain voice feature
  • Includes 2 AA batteries; 5 year limited warranty
  • Tested to the highest industry standards, meets UL safety standards
28 new from $26.98
$34.87 & FREE Shipping on orders over $49. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

  • First Alert SCO5CN Battery Operated Combination Carbon Monoxide/Smoke Alarm
  • +
  • First Alert SA320CN Dual Sensor Battery-Powered Smoke and Fire Alarm
Total price: $57.96
Buy the selected items together

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Size: 1 Pack
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Product Description

Size: 1 Pack

Amazon.com

Carbon monoxide (CO) is the leading cause of accidental poisoning deaths in America, yet many people don't know they are suffering from CO poisoning until its too late. Since symptoms of CO poisoning are like the flu, you might not even know you're in danger at first. That's why a carbon monoxide alarm is an excellent way to protect your family. It can detect the CO you can't see, smell or taste in the air.

The First Alert SCO5CN carbon monoxide and smoke alarm uses an electrochemical carbon monoxide sensor-the most accurate technology available. The alarm uses photoelectric smoke sensing technology which is environmentally friendlier and which reduces nuisance alarms, making it ideal for cooking areas. It is also great for sensing slow smoldering fires quickly. The permanent sensors last the lifetime of the alarm. The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. A low battery signal alerts you to replace the battery and end-of-life alarm of three chirps alerts you to replace the unit. Two AA batteries are included. 5-year limited warranty. UL listed. Not available for sale in Massachusetts.--Bree Norlander

What's in the Box
One combination carbon monoxide and smoke alarm, two AA batteries, and user's manual. This does not contain voice feature.


Product Information

Size:1 Pack

Technical Details

Part Number SCO5CN
Item Weight 10.4 ounces
Product Dimensions 8.2 x 6.8 x 2.5 inches
Item model number SCO5CN
Size 1 Pack
Color WHITE
Power Source battery-powered
Item Package Quantity 1
Batteries Included? No
Batteries Required? No

Technical Specification

Additional Information

ASIN B000MXJ498
Customer Reviews
4.2 out of 5 stars 463 customer reviews

4.2 out of 5 stars
Best Sellers Rank #301 in Home Improvements (See top 100)
#4 in Home Improvement > Safety & Security > Fire Safety > Combination Smoke & Carbon Monoxide Detectors
#8 in Home Improvement > Safety & Security > Household Sensors & Alarms
#36 in Home Improvement > Contractor Supply
Shipping Weight 10.4 ounces (View shipping rates and policies)
Domestic Shipping Item can be shipped within U.S.
International Shipping This item can be shipped to select countries outside of the U.S. Learn More
Date First Available September 14, 2004

Warranty & Support

Product Warranty: For warranty information about this product, please Click here [PDF ]

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From the Manufacturer


Customer Questions & Answers

Customer Reviews

Top Customer Reviews

By K. Stuckey VINE VOICE on December 5, 2008
Size: 1 Pack
I spent a good amount of time in the fire safety aisle of a local store, reading packages and comparing units before selecting this particular one to replace an aging smoke-only alarm. This one has two different-sounding alarms (3 beeps for fire and 4 beeps for carbon monoxide) and runs on 2-AA batteries. The batteries can be replaced without taking the unit off the ceiling and the compartment won't close without batteries in it. I installed it by myself in just a couple of minutes with a pencil, drill, hammer and flathead screwdriver. It has several features I chose not to use, most involve locking systems to prevent tampering, but it is nice that they are offered. Also has a photoelectric sensor claiming to prevent false alarms from food smoke and shower steam. I think it's a great value for my family's safety.

**(12/20/08)**I would like to amend my review. A week after installing, the alarm started "chirping" 3 times at irregular intervals (once at 4:00am Sunday, then Tuesday at 1:30pm). I changed the batteries after a third incident (again in the early morning) and it was fine for another four days. The next time I took it down and noticed the back indicates the 3 "chirps" is to replace the alarm. I have had the thing less than a month and have to replace it already?!?!? What a CROCK!

**(12/22/08)**I called and spoke to a rep from First Alert on the phone who explained to me the unit runs a self-test every 90 seconds and if it fails, the alarm 'chirps'. He asked me a few questions and promised me a new unit in a week to ten days.

**(1/14/09)** I received a new unit in the mail today, hard to install with my fingers crossed.

**(3/3/09)**Another malfunctioning alarm, at five o'clock in the morning. I am through with this junk!! Buy only if you want to replace every 4-6 weeks.
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By J. Headley on January 10, 2010
Size: 1 Pack Verified Purchase
I bought two of these last year. Within a few months, we started getting false alarms. Three chirps in a row. Sometimes they would stop on their own. Other times, I would have to take them down, take out the batteries, and hang it up again later.

Each time, I tested the batteries. Each time, they were fine. I ever replaced the batteries a couple of times, just to be sure.

Don't buy these. They'll drive you to drink.
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Size: 1 Pack
Bought and installed one of these in my upstairs hallway.

Within 3 months of installation, the alarm began intermittently emitting the "3 rapid chirps" alarm, which means that the entire unit is bad and must be replaced. Extremely unreliable!
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Size: 1 Pack Verified Purchase
Like many other reviewers, the four that I bought are having intermittent spells of the dreaded "three chirps". Not sure what brings it on, but it seems to invariably happen in the middle of the night. Extremely annoying.
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Size: 1 Pack
I needed to replace a couple very old smoke detectors and decided to upgrade to a smoke and carbon dioxide detector. One of the problems with old smoke detectors is they use 9volt batteries which also are difficult to replace as well as expensive. This new First Alert dual smoke and carbon dioxide detector uses 2 AA batteries and has a separate battery compartment which allows you to replace the battery without taking the detector off the ceiling. Cheaper batteries and much easier to replace them. The cost at Amazon was only $30 and nicely cheaper than anywhere. All-around good service from Amazon. Very satisfied customer here.
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Size: 1 Pack Verified Purchase
Within 2 months of installing the alarm began intermittently emitting the "3 chirps" alarm, which means that the unit is bad and must be replaced. Very annoying and a waste!
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Size: 1 Pack
One month in place and have same 3 chirp problem. Company sending replacement, but now I expect problem to recur. Very disappointed because I bought 2 devices based on Consumer Reports recommendation for effectiveness. My model is SC501CN. Bought 4 smoke detectors too (SA302CN) and think one or two has same chirp problem.
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Size: 1 Pack Verified Purchase
I have rental properties and I decided to upgrade all units to have monoxide detectors. I decided on this unit because it is a two in one device and it used double AA batteries instead of the nine volts. My tenants keep complaining that these devices keep beeping. I looked on the back and 3 chirps = bad detector. I took a few of them down, put up the old ones and brought them to my home. They have not chirped since. Something about the other place is making these detectors fail.

Another thing is that I did not notice this but there is a 5 year life on these detectors and then they will chirp without any choice but to replace them. So even if yours works at first, you only will get 5 years out of it. I bought a total of 7 of these that cost me a few hundred and now I need to look for replacements. I wish I left all the old smoke detectors in.
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