List Price : $75.99
Sale Price : $34.99
- Hardwire wireless smoke alarm with battery backup
- Uses photoelectric sensing technology which is environmentally friendlier
- Low battery warning; simple to use silence/test button; pullout battery drawer
- Add additional battery operated First Alert ONELINK alarms to expand without wires
- 120-volt with 2 AA battery backup
First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup Overview
First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup In the event of a fire every second counts. If a fire were to begin in your basement and the alarm there sounded, you may not hear it right away if you're sound asleep two floors up. With traditional battery-operated alarms, you lose valuable time waiting for the smoke to rise to another alarm, on another level, before the alarm on your floor sounds. But with First Alert ONELINK alarms, if one detects danger, they all sound. This can alert you sooner, and it increases your chances of getting out safely.
Until now, alarms that could signal each other were only available in homes with hardwired alarms requiring installation from an electrician. But First Alert ONELINK alarms communicate without wires.
The First Alert ONELINK SA501CN alarm uses photoelectric 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 alarm includes a low battery warning and a super bright escape light. You can easily expand an existing interconnected 120-volt AC system by replacing one alarm in the series with this alarm. The test/silence button both silences a non-threatening alarm or low battery warning and allows you to test the unit's functionality. The AA batteries are easy to install in the convenient pullout battery drawer. Two AA batteries included.--Bree Norlander
What's in the Box
One smoke alarm, two AA batteries, and user's manual
First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup Review
#First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup Best Review# I have 7 of the First Alert SA520 Onelink units that were installed in my home 2.5 yrs ago. They were easy to set up although getting power to each unit in an older, 3-story home was the biggest challenge. They link to each other well. You may wish to install them in a particular sequence if using many of them on different floors. That way when the first one goes off, you might have a fighting chance of knowing which one it is since that one sounds off first. The reason I say this is because ours have begun going off in the middle of the night for no apparent reason. It has happened 4 times in about 4 months, and we never know when it will happen. They start sounding the alarm but shut off after about 20 secs, by themselves. We thought we had one defective unit but after removing it several days ago, they went off again tonight (6pm). All the other times have been when we were dead asleep, and boy is that a shock! These units are LOUD!Gave it four stars for loudness and ease of setup. Minus one star for this bad habit I've described. Anyone know what might be causing this? Can they be tripped by RF interference? Says on the back that they "have to accept interference even if detrimental." (Who thought that one up?)
FOLLOW UP LATER.....
I discovered that the unit that was giving me trouble was near a ceiling fan on a dimmer switch that must have been sending dirty power into the circuit while it was running (as motors can do). when the fan is not running, i haven't had the problem with the false alarm. my suggestion is to narrow the search to find the one sending the alarm and take it off of the line power and run it only on the batteries to see if a dimmer or motor is causing the problem.
worth the $, high-quality, easy, so far so good - Jiminy Cricket - downstate NY USA
Bought 6 of these to replace my 13-year old BRKs. Easy to install. The wireless "mesh" interconnect feature was very easy to set up and seems extremely well designed. [The sensors in your "mesh" all recognize and talk to each other so that any sensor can trigger any or all the others, but they all ignore any sensors not programmed into their little network, i.e. they supposedly ignore the neighbors sensors. Also, if one sensor is remote, it only needs to be able to reach one other sensor in the net. It does not need to be able to reach all others...they will relay the alert.] They can also easily link into any existing hard-wired interconnect system in addition to the wireless.
Also I like the combination of battery backup and hard-wired power.
I also like the one button operation. Press the button to test, and press it again to silence any alert. So far so good. I think they are definitely worth the extra $ for trouble-free reliable detectors.
I also like the fact that they are optical (non-radioactive). But the instructions recommend to have both types (optical and radioactive ionizing), so I think I'll be buying 2 more of their ionizing type, one for each floor. Ionizing is supposedly better (than optical) for kitchen and wood stove areas.
I'll update this review if my opinion changes, but so far so good.
First Alert SA521CN - J. Lomonaco - USA
I installed eight of these and it was a simple process. All eight are in sync and work well. They are much better than the low cost units they replaced.
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