$27.95 $39.95
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NOTE: Z-Wave gateway controller required - sold separately.
Check your wiring first to confirm that you have all the following wires present in your electrical box: power, neutral, and the connection to the detector.
If you are not comfortable identifying the wiring and following the instructions, please hire a licensed electrician.
Here is an example diagram showing how to wire the ZEN55 to a smoke detector:
NOTE: If you don't see your Z-Wave controller on the list above, please ask the manufacturer of your Z-Wave hub about support for the ZEN55 before you purchase this product.
Download the Manual for the Zooz 800 Series Z-Wave Long Range DC Signal Sensor (PDF)
I had one bad smoke detector, so I was originally looking for a smart one to replace it with; one that would integrate with Home Assistant directly. I already had the SkyConnect as a Zigbee hub, so that's the way I was leaning. Then I decided that I may as well add a Z-Wave hub for more flexibility in my home. That's when I came across the Zooz stick and this DC sensor. The item arrived quickly. The packaging was nice. The instructions were easily understood. Can't ask for much more than that. I could ask that it works for real, but I'd rather not find out, if you know what I mean. ;)
After moving into a 12 year old home and getting a Home Assistant server running, I wanted to find a way to integrate the 8 wired and interconnected smoke detectors throughout the house. The smoke detectors were original (12 years old) and needed to be replaced, so I considered purchasing 8 new Z-wave detectors to replace the existing First Alert units. However, I had trouble finding wired Z-wave replacement units that I wanted to put in the house. This would have been an expensive path, but I would have gone this way if I hadn’t ‘stumbled’ onto this amazing product. The ZEN55 LR offered a creative solution for my situation, and installed easily just like any Z-wave product and provided sensors for both smoke and carbon monoxide notifications as reported by the detectors. I found hard-wired replacement First Alert smoke AND carbon monoxide detectors (upgrade to the smoke only detectors already in place) at a local big box store, and installed them, along with the ZEN55 LR. It was easy to build a few automations in HA to provide notifications on events - providing peace of mind when leaving the house for any period of time. Thank you for providing such a creative product.
Note there is a firmware update for this device -- DO APPLY IT.
If you don't it can "disappear" after a period of time and will not respond to commands (e.g. "are you alive" checks, which is important for a device of this purpose!) BUT it still does send alerts if the CO or Smoke goes off.
The firmware update fixes this -- DO OBTAIN IT and, if yours starts doing that, contact Zooz support -- they have it available.
This is a device that someone should have built YEARS ago; it is an essential in any connected-smoke-alarm house with automation (that's anything reasonably-recently built.) Contrary to the instructions you do NOT need anything fancy set up in your controller either; it sends notification frames to the Group 1 association when triggered if you do nothing other than "ordinary include stuff".
You SHOULD have any ventilation-related thing (e.g. HVAC, etc.) turn and lock OFF if there is a Smoke or CO alarm as circulating potentially poisonous air is really bad. Until this device that was hard; there was a passive listening" device that another company made which sort of did it, but not on a hard-wired basis. This does the job. Since its hard-wired if your controller "supervises" (e.g. checks that a hardwired unit is online) every now and then it also will TELL YOU if the power is off to the smokes, which is REALLY important too since even with battery backup they eventually run out and if you don't know you can't fix it.
Its small enough that it trivially fits into the box behind one of the smokes so installation is easy. My hard-wired detectors are smoke-only and I've covered that with ZCombo detectors but that it can figure out the difference between smoke and CO is nice which means I can get rid of those and swap em out.
STRONGLY recommended. I have my own controller software so no idea on other integration, but I see no reason you need anything special for this one.
Installed with my First Alert alarms and setup using Home Assistant super quick. I was surprised to see it detects Smoke and CO separately. Exactly what I've been looking for for a long time.