THIRDREALITY Zigbee Contact Sensor 4 Pack, 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 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!

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.

Brilliant product, I have it installed all over the house and haven’t had to touch it since I got it into HomeAssisstant. Batteries might have to be changed at some point, I recommend getting rechargeable ones for that.

Overall I’m pleased with these sensors. I like that they use AAA batteries Compatibility is fine - I haven’t had any issues with their connectivity (I use a mix of Zigbee vendor devices off a Sonoff Zigbee dongle). Detection range of the magnet is OK, but can be a little tight depending on this next factor: Something that is very strange about them is that the two parts of the sensor are not the same thickness. The main body is quite a bit thicker than the small magnet. This means that if you mount them on a level surface, they will not be level with each other! Depending on your situation, this can affect detection. A strange choice, but not a deal breaker for my use cases.

Love these sensors. They pair almost instantly and are a great addition for my home assistant setup to automate all my lights. I’m also using them for my own local security system. Definitely the best value out there for sensors. You can’t go wrong with any Thirdreality product.

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.

Works as expected with an Abode Smart Security System. Pairing is a little finicky. It seems if you put the hub into 3rd party device pairing mode, put the sensor into pairing mode, wait for the blue light to stop flashing, then trigger the sensor, it pairs quickly. If you don’t trigger it, it seems to not want to pair. It may take a few tries but it pairs and works reliably with good range.

These are GREAT sensors so far. Had them installed for about two weeks now and zero issues. The install and integration to my Smarthings environment was easy. In fact, these were the simplest devices to find and add to the n/w I’ve ever experienced - normally I have to stand on my head, face north and contact some spiritual being to add sensors 😜 One other functional item I’ll note is the distance between the two parts can be fairly large, like over an inch, and still work. There’s an embedded LED in the receiver that lights when the transmitter (magnet) is sensed, which is super helpful when installing and checking functionality. Anyhow, I’m planning to buy more!