THIRDREALITY 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 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.

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.

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.

SIZE: Smaller than expected, it was described in millimeters, and the conversion just didn't work in my head (30mm = 1.1811inches)??? Now I can carry it with me and see what it fits into. SETUP: It was easy to connect to the Samsung SmartThings app. It reports actions very quickly, like within a few seconds, versus Wyze, which took at least 10 seconds. PLAN: Now need a way to make it waterproof so it can be used on the mailbox. The goal is to replace the Wyze contact sensor, which gave me a notification that the mailbox had been opened when mail was delivered.

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!

Very unreliable. Was using it for a laundry room and it wasn’t good for that, wouldn’t dare use this for anything involving safety / security. Disconnects from the hub which is 10 feet away. I have had to unpair and reconnect it twice and still doesn’t stay online. Do not recommend this product.

I set these up with home assistant and SLZB-06M with ZHA. Red light blinks on when closing or opening. The sensitivity is great so I can know if my door is cracked open even a tiny bit. Reliability has been great so far. I appreciate that this uses AAA batteries, which are cheaper and easier to find than button cells.