Donate |

CO & smoke alarms

First Alert OneLInk SCO501CN
Price range:
$49.94 - $233.82
Price it button
Summary: This model was tested by our experts.
Dividing line
Community icon9 people have reviewed this model.
Type: Interconnected alarms
About - First Alert OneLInk SCO501CN

The First Alert OneLInk SCO501CN is part of the CO & smoke alarm test program at Consumer Reports. In our lab tests, carbon monoxide alarm models like the OneLInk SCO501CN are rated on multiple criteria, such as those listed below.

High CO levels:
High CO levels rates a model's response to CO of 300 parts per million.

Low CO levels:
Low CO levels rates a model's response to CO of 150 ppm.

Display/voice rates the accuracy of the CO level either displayed digitally or conveyed by voice message.
About This Brand

First Alert owns the BRK branded units, and the ONELINK line of wireless, talking units. Product offerings include plug-in, battery, hardwired, and hardwired with battery-backup units. Carbon monoxide units range from $20 to $100. First Alert also offers combination units that detect carbon monoxide and smoke.

These combo units use electrochemical and photoelectric technologies. First Alert is available at Home Depot, Lowes, Walmart, Target, and at food and drug stores.

Smoke alarm prices range from $13 to $100. Product offerings include dual sensor units, which combine ionization and photoelectric technologies.

Features & Specs - First Alert OneLInk SCO501CN
info Power supply Battery
info Peak memory Yes
More features and specs
User Reviews - First Alert OneLInk SCO501CN
User Reviews
Already own it? Write a review
(2 of 3 customers found this review helpful)
Frustrating Product
Best Uses
I have rarely bought a product more frustrating. I bought three. The location program didn't work on any of them. I put up with these units screaming at me in the test mode, but could not get the program to work. You will have a hearing loss when you are done with the installation process.
How long have you owned it:
A month or less
Bottom Line
No, I would not recommend this to a friend.
(3 of 4 customers found this review helpful)
Effective & reliable
Battery Life
Location Announced
Best Uses
Detector Error
Every bedroom
We have had these units for at least seven years. Initially, we had a problem with all units reporting low battery prematurely. All were replaced at no cost, and alkaline battery life has been about one year. (Because of the initial battery problems, I started noting the date of each battery replacement on a small piece of paper taped in the back of each unit. Since the life is sometimes a little less than a year (battery make? time unused on shelf?), I recommend replacing batteries when the units report the need. (If you are away for an extended period, run the test.)<br /><br />These detectors are located near the kitchen, near our bedroom (just my wife and I are here normally), in another furthest bedroom, and at the foot of the basement stairs. Because these units form a network and repeat each other rather loudly, that is something to keep in mind when choosing where to place them, aside from assuring that all risk areas are covered.<br /><br />The kitchen detector has gone off two or three times, properly. The third time, a house guest was cooking with oil and got the oil much too hot. There was much smoke in the air.<br /><br />Now, about a month later, the alarm spoke an announcement twice. I did not quite catch what it said. Then the kitchen alarm, by itself, beeped every minute or two. Batteries tested slightly low. New batteries (tested first) installed: alarm still beeping. Pressed the test button. The alarm announced testing, followed by the others, then the usual sequence, until I heard something like detector error reported in kitchen smoke alarm, see owners manual. Not a word about this in the one-sheet manual. Also no help at the manufacturer's web site.<br /><br />Also not in the manual. I did not want to hear the beeping once I knew what it meant, and put the battery holder out. Then I tested one of the other detectors to be sure the others were communicating. The network re-established itself without the kitchen detector. I don't know if this was necessary, but would recommend it as a precaution.<br /><br />These alarms were warranted for five years. The manufacturer's site now indicates they are warranted for seven years. I suspect the detector error is the result of fouling by too much smoke, but it could just be too old. I will know only if the others start failing.<br /><br />I intended to replace the failed unit.<br /><br />They are a bit expensive, but provide voice announcements identifying the problem and its location. The voice network feature justifies the price.<br /><br />They are easy to remove from the base, usually in order to replace the batteries (and test), and relatively easy to remount on the base.<br /><br />While the owner's manual, I now know, doesn't tell you all it probably should, that is a minor flaw.
How long have you owned it:
More than six months
Bottom Line
Yes, I would recommend this to a friend.
(2 of 2 customers found this review helpful)
I am surprised at the negative reviews.
Easy To Install Program
Good battery life
Strong Warning
Best Uses
We have had three of these for several years, and although we have had no fires or CO alerts yet, they seem to work just fine. Pushing the test button will send all three into an unignorable cacophany. Someone has recommended to me to buy separate CO and CO2 detectors, and to mount them at different levels above the floor. If I make that switch when these wear out, I will look for this brand of wireless versions for sure.
How long have you owned it:
More than six months
Bottom Line
Yes, I would recommend this to a friend.
See all Models
Nobody Tests Like
We Do
Our testers put 100s of products through their paces at our National Testing and Research Center. Learn more about how we test for:
Learn more