Zigbee Contact Sensor, Door and Window Monitor, Home Automation, Works with Home Assistant, SmartThings, Aeotec, Homey, Hubitat or Echo Devices with Build-in Zigbee Hub,hub Required

These are really good. They work very reliably and hooked into the SmartThings ecosystem and my hub without any issues. It's Zigbee based so most Zigbee systems should be compatible but check first. Your milage may vary since the ecosystem and hub interoperability of smart home tech is a mess. The mounting and installation is easy and intuitive with the ridge to ridge contact points between the door and the frame needing to line up. Manual says the gap distance can be up to 16mm but I've found it supports a wider gap close to 25mm. Which is good. The only knock I have against these is the adhesive pads aren't great and if you try to position the two sensor parts too close together the air rush of the door swing can loosen them. Getting your own better adhesive pad and widening the gap slightly worked way better. Box does have screws included if you wanted to go that route to secure these to the frame and door but I didn't personally want to go that.

Cheap, simple, and functional. They pair easily to home assistant and are very responsive.

These are great door/window sensors that have been super reliable for me so far. I was tired of a few other brands falling off my Zigbee network, so I went to trusty ThirdReality and haven't been disappointed. They are a bit bigger than alternatives, but that's because they pack a couple of AAA batteries which I expect to last a long time (given their record with other Zigbee devices). It's been several weeks and no battery issues so far; I would guess they'll last months or even years depending on usage. ThirdReality is also a Home Assistant partner, which means they actually test their stuff with Home Assistant and ZHA for their Zigbee stuff. It's perfectly compatible with my Sonoff Zigbee radio, as well as the Home Assistant ZBT-2 I recently switched to. They're a bit on the large size and not particularly pretty, but I don't think you could find a more reliable contact sensor for doors or windows (or drawers, or car chargers, or toilet lids… whatever you freaks are automating!) or a better value anywhere else. If you have the physical space, I'd highly recommend them!

Works well most of the time. Occasionally, it will not function, but still worth it. Good sensor if you have it in cold weather as it uses alkaline batteries instead of lithium ion. I have mine in my garage mounted to my attic ladder to turn the lights on when opened.

I purchased these to help with various automations around the house including turning lights on and off, warning if freezer/refrigerator doors are left open, etc. and they work perfectly with my Home Assistant setup. The devices were instantly recognized by my Sonoff Zigbee 3.0 USB Dongle Plus (connected to my Pi5 running Home Assistant) and I could setup everything from there. So far, zero complaints as they work like a charm. For those folks frustrated with the mounting tape included with these such that upon removal the devices can crack, I simply used 3M Command Damage-Free Hanging Strips to make moving them super easy. Attached is a picture of the one I have installed atop the inside of my pantry door. I moved it from one spot to another using the Command strip and it came off damage free.

Updated review 11/14/22 and reinstated 5 star rating: Apparently, during the last week or so of October 2022, there was a software issue of some sort between this device (contact & motion sensors) and my Echo Show. I think it was a zigbee issue. A lot of users of zigbee-enabled devices complained about it on reddit. I don't know the exact problem because it's all hush-hush, keep the customer uninformed. Apparently, it was corrected by Amazon after approximately one week. My Third Reality zigbee contact and motion sensors all work beautifully at the moment. Until the next glitch, of course. I reinstated my original 5 star rating because I really like how these devices work for me (except for the glitches, of course). ----------------- Updated review 10/31/22 and 1 star rating: It worked great, until it didn’t. It disconnected from Alexa and won’t reconnect. The sensor itself works. The red light lights up when the door is open, but what good is a sensor when Alexa can’t tell you the door is open? ——————— Original review 10/13/22 and original 5 star rating: This device works with my Echo Show with zigbee. I asked Alexa to "find my device" and she did. I didn't need any other hub, app, or skill, and I like that it's not wifi. I purchased a couple to use on interior doors at night so I know if a door opens or not. I set up an Alexa routine. In my house, Alexa announces the door is open within 3 seconds of opening the door. There is no down or recovery time. It'll work again within seconds. I'm very happy with it and its easy integration via zigbee with the Alexa app.

There’s nothing I love more than spending hours at a time on Friday night trying to understand how to connect devices to my 87 different ecosystems that for some unknown reason aren’t compatible with one another. Between SmartThings, Apple home, Aqara and Alexa you’d think that a stupid matter compatible device such as this would work. But in order for that to happen I’d need a matter qr code which these don’t have… I consider myself quite tech savvy but I’m just about done spending my free time trying to get these stupid things to work. That includes Aqara, Apple home and SmartThings which can all choke for all I care. I was able to get Alexa to work in the past but it’s not as if that was easy either. Waste of money, not compatible, inaccurate and frustrating. I hate this and all other smart home devices and I’m done spending my time trying to figure this out. I’d rather have a dumb home and protect myself with my small Louisville slugger as my security system.

Bought this to use in conjunction with a palm vein smart lock to monitor door status and enable routines. Super easy pairing through Hubitat, and I was able to configure it alongside the lock to lock/unlock based on the status of the sensor AND prevent errant locking when the door was closed and then quickly opened again (HUGE bonus). Don't know about the battery life yet, but I don't anticipate having to change them anytime soon.

Het item voldoet volledig aan de eisen

I’ve been using these door/window contact sensors around the house for a few months now, and they’ve been great. I set them up to turn on cupboard lights when doors open, and to automatically turn on the hallway lights when the front door is opened at night. Once paired with my Zigbee setup (I’m running them through Home Assistant), the automations fire reliably and consistently, no lag or missed triggers. Installation was straightforward: the sensors are slim, powered by standard AAA batteries with up to ~2 years of life, and can be mounted with either the included adhesive tape or screws. Once connected they’ve stayed paired without any problems, and using regular batteries (rather than coin cells) makes swapping them out simple when needed. Overall these contact sensors have worked exactly as I’d hoped. They’re reliable, great value, easy to integrate into automations, and now a core part of my smart-home setup.

Nutze die Sensoren in Verbindung mit ioBroker/NodeRed. Funktionieren einwandfrei, unauffällige Optik.

Funciona de lujo, raros son los que pueden tener tal espacio de detección. Además, usando pilas normales, fácil cambiarlas y recargarlas. La única pega es que usando pilas normal, pues es un poco más grande, claro.

Einrichtung mit homeassistant hat problemlos funktioniert. Verbindung zu Router ohne Probleme. Somit Aussage einer 2 Sterne Rezension dass kein mesh möglich ist schlicht falsch. Sendet Zustand permanent nicht nur wie Sensoren anderer hersteller beim Öffnen oder schließen. AAA Batterie kann leicht gewechselt werden. Einziger Nachteil ist dass er etwas größer ist wegen der Batterien aber das ist aufgrund dass Daten alle paar Minuten gesendet werden verständlich. Hab noch nichts besseres gefunden und schon viele Sensoren ausprobiert.