First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup
by First Alert
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List Price: Our Price: $31.95 You Save: $44.04 (58%) Availability: Usually ships in 24 hours Category: Tools See more product details |
Product Details
Manufacturer: First AlertModel: SA521CN
Product features:
- Hardwire, interconnected 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 AF400-2 Tundra Fire Extinguisher Aerosol Spray Twin Pack
- First Alert SCO501CN-3ST (Series SCO500) ONELINK Battery Operated Combination Smoke and Carbon Monoxide Alarm with Voice Location
- First Alert EL52-2 Two-Story 14-Foot Escape Ladder
- Alarm Arm 110-00 No Ladder Smoke Alarm System
Tools and Hardware Reviews of First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup
Customer Review: Unpredictable?
Summary: 4 Stars
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.
More First Alert SA521CN ONELINK Hardwire Wireless Smoke Alarm with Battery Backup Customer Reviews:
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Description of 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
Smoke Alarms Tools
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