--- product_id: 330583391 title: "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" brand: "thirdreality" price: "29587CFA" currency: XOF in_stock: true reviews_count: 13 category: "Thirdreality" url: https://www.desertcart.sn/products/330583391-zigbee-contact-sensor-door-and-window-monitor-home-automation-works store_origin: SN region: Senegal --- # Zigbee 3.0 compatibility 2-year battery life OTA firmware updates 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 **Brand:** thirdreality **Price:** 29587CFA **Availability:** ✅ In Stock ## Summary > 🚪🔔 Stay ahead of every open door moment—smart security that just works! ## Quick Answers - **What is this?** 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 by thirdreality - **How much does it cost?** 29587CFA with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/330583391-zigbee-contact-sensor-door-and-window-monitor-home-automation-works) ## Best For - thirdreality enthusiasts ## Why This Product - Trusted thirdreality brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Long-Lasting Power:** Powered by two AAA batteries delivering up to 2 years of uninterrupted monitoring—set and forget. - • **Custom Alexa Routines:** Trigger lights, alerts, or even jokes when doors/windows open—turn security into smart entertainment. - • **Seamless Zigbee Integration:** Effortlessly pairs with Echo (4th Gen), SmartThings, Home Assistant & more for unified smart home control. - • **Real-Time Monitoring & Alerts:** Track battery status and event history via Third Reality app with low battery email notifications. - • **Instant Setup & Auto Discovery:** Get started in seconds with Alexa voice commands—no tech headaches, just smart convenience. ## Overview The THIRDREALITY Zigbee Contact Sensor is a compact, plastic door/window monitor compatible with major Zigbee hubs including Echo devices, SmartThings, and Home Assistant. It features a hassle-free setup with Alexa voice discovery, a robust 2-year battery life powered by AAA batteries, and supports OTA firmware updates. Enhanced by the Third Reality app, it offers real-time battery monitoring, event history, and customizable Alexa routines for a smarter, safer home experience. ## Description 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 - desertcart.com Review: Works really well, simple to set up, very responsive - 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. Review: I wouldn't bother buying something more expensive, these are perfect - Cheap, simple, and functional. They pair easily to home assistant and are very responsive. ## Features - ZIGBEE STANDARD COMPATIBLE DOOR SENSOR: Works with compatible Zigbee hubs or Echo devices with Zigbee hub built-in. Such as Echo (4th Gen), Echo Plus (1st Gen and 2nd Gen), Echo Show 8 Gen3, Echo Show 10 (Gen2 and Gen3).Echo Studio, Eero 6, Eero Pro 6, Home Assistant, SmartThings 2015/2018, Aeotec, Hubitat, Homey Bridge, Homey Pro, Third reality Hub and Third Reality Smart Bridge. - HASSLE-FREE SETUP: Installs in a few seconds. Just make sure device in paring mode and compatible Echo device automatically discovers it by saying “Alexa, discover devices”. - SUIT FOR MOSTLY DOORS AND WINDOWS OF THE HOUSE AND 2-YEARS LONG BATTERY LIFE: Door Sensor uses two AAA 1.5V Alkaline batteries for power, the batteries can last for up to 2 years and it is very easy to replace them. Note: Indoor use only and do not install the Door Sensor on metal door or window. - MORE FUN WITH ALEXA ROUTINES: Using the Alexa app, create your own routines that are triggered When door or window is open, turn on a light, send an alert to your phone, let Alexa make a voice alarm or make a joke, etc. - UPGRADED THIRD REALITY APP AND SKILL FUNCTIONS: Connected with Third Reality Hub/Speaker, you can check the battery level in the APP, then replace the batteries in time; history record is also open to the users, so you can know when the state of the movement has been detected and deal with it in time. Enabled Third Reality Skill in the Alexa APP, you will have a low battery warning by emails. - More Smart Assistant Supported: Enabled by Smart Bridge MZ1 (Sold Separately), integrates with Apple HomeKit, Google Home, desertcart Alexa (Smart Speaker required) and SmartThings, to achieve easy control and monitoring. Additionally, it supports software OTA (Over-The-Air) updates, allowing for effortless firmware upgrades ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08R9PH4JT | | Best Sellers Rank | #18,580 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #37 in Home Automation Hubs & Controllers | | Brand | THIRDREALITY | | Brand Name | THIRDREALITY | | Customer Reviews | 4.4 out of 5 stars 1,152 Reviews | | Included Components | AAA Battery × 2, Door Sensor, Double-sided Tape, Screws | | Item Dimensions | 1.97 x 0.83 x 2.36 inches | | Item Weight | 2.08 Ounces | | Item dimensions L x W x H | 1.97 x 0.83 x 2.36 inches | | Manufacturer | Third Reality, Inc | | Material | Plastic | | Material Type | Plastic | | Model | P1DSA2 | | Mounting Type | Door Mount | | Output Type | Push Button | | Part Number | 3RDS17BZ | | Smart Home Compatibility | Smart Home Compatible | | Style | Door Sensor | | Style Name | Door Sensor | | UPC | 850001595285 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** THIRDREALITY - **Item Weight:** 2.08 Ounces - **Item dimensions L x W x H:** 1.97 x 0.83 x 2.36 inches - **Material:** Plastic - **Style:** Door Sensor ## Images ![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 - Image 1](https://m.media-amazon.com/images/I/41-tjH1nx-L.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: Will this work with samsung smartthings smart home hub 2nd generation?** A: A definite maybe! I bought one and did get it to work so I bought a second one. I have a 2nd gen Smarthings/ Aerotec hub. I could not get this one to work and spent 2 hours trying various solutions. The linking process could defiantly be improved. **Q: Will this contact sensor work with any tuya zigbee hub?. i need it to work with tuya or smart life app.** A: I'm using 5 3rd realty switches all via Zigbee hub....should work **Q: is the sensor affected by gravity - meaning - can I angle it, use it upside down, etc? thx!** A: Not affected by gravity (horizontal or vertical). I have sensors installed on doors and windows. It does not make a difference. They work in either orientation. Hope this helps. **Q: Is this UL 2017 approved?** A: Unable to confirm, not listed on the product or in the literature ## Customer Reviews ### ⭐⭐⭐⭐⭐ Works really well, simple to set up, very responsive *by J***E on May 6, 2026* 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. ### ⭐⭐⭐⭐⭐ I wouldn't bother buying something more expensive, these are perfect *by I***1 on May 27, 2026* Cheap, simple, and functional. They pair easily to home assistant and are very responsive. ### ⭐⭐⭐⭐⭐ A bit big, but it's ThirdReality so it just works *by C***Y on January 12, 2026* 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! ## Frequently Bought Together - 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 - THIRDREALITY ZigBee Smart Plug 4 Pack with Real-time Energy Monitoring,15A Outlet, Zigbee Repeater,ETL Certified,ZigBee Hub Required,Work with Home Assistant,Compatible Echo Devices and SmartThings - THIRDREALITY Zigbee Motion Sensor, Pet Friendly, Compatible with Home Assistant, SmartThings, Aeotec, Homey, Hubitat or Echo Devices with Built-in Zigbee Hub --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sn/products/330583391-zigbee-contact-sensor-door-and-window-monitor-home-automation-works](https://www.desertcart.sn/products/330583391-zigbee-contact-sensor-door-and-window-monitor-home-automation-works) --- *Product available on Desertcart Senegal* *Store origin: SN* *Last updated: 2026-07-15*