List Price : $75.99
Sale Price : $36.99
- 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.
Not without problems - Ronzi -
I bought 5 of these alarms (NYS requires one for each bedroom plus one on each level of house). Three worked fine out of the box. Two had to be returned, they sounded the 3 chirp defective unit code and wouldn't stop. This code is different than the weak battery warning. An google search found other reviews with the same problem; units don't pass the self diagnostic (3 chirp code) after a short period of use.
On the plus side they have a 10 year warrenty and First Alert doesn't seem to hassle about returns.
Lightyears better than standard hardwired interlink - Robert Monk - Philly, PA
This item meets Philadelphia local building code for renovation construction short of total rehabilitation, for compliance with the interlinked detectors requirement of dwelling smoke/co detection systems. The OneLink line includes a relatively painless setup that allows you to program device locations so that the trigger point of any alarm event is announced verbally at each interlinked oneLink device. The interlink feature seems to be compatible with Kidde and FirstAlert (BRK) hardwired systems (3-conductor black-red-white-ground interlinking house wires).
I have yet to verify that two hardwired oneLink units can create a wireless bridge between two wired networks that have no wired connection between them. But I have high confidence. My case is a re-wire of a third floor in a house where the other floors have 3-conductor detector locations already wired. Using two OneLink hardwire units, I will bridge the new 3rd floor wiring with the existing basement/first floor/second floor 3-conductor system wirelessly (without disturbing the existing 2nd floor ceiling to fish wires from the new 3rd floor system).
Its really a great post and very informative.I like this post...If you know more about medical alert system.Visit on this medecialalertcenter.com
medicalalert
27 November 2011 at 23:13