---
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: "203 Lei"
currency: RON
in_stock: true
reviews_count: 13
category: "Thirdreality"
url: https://www.desertcart.ro/products/330583391-zigbee-contact-sensor-door-and-window-monitor-home-automation-works
store_origin: RO
region: Romania
---

# Zigbee 3.0 compatible 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:** 203 Lei
**Availability:** ✅ In Stock

## Summary

> 🚪🔔 Never miss a moment—secure your smart home with THIRDREALITY’s reliable contact sensor!

## 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?** 203 Lei with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ro](https://www.desertcart.ro/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

- • **Plug & Play Setup:** Get started in seconds with Alexa voice discovery—no tech headaches, just smart living.
- • **Long-Lasting Power:** Powered by 2 AAA alkaline batteries delivering up to 2 years of uninterrupted monitoring.
- • **Custom Alexa Routines:** Trigger lights, alerts, or even jokes when doors/windows open—automation that fits your lifestyle.
- • **Effortless Zigbee Integration:** Seamlessly connects with Echo, SmartThings, Home Assistant & more for instant smart home control.
- • **Real-Time Monitoring & Alerts:** Track battery status and sensor history via Third Reality app with low battery email warnings.

## Overview

The THIRDREALITY Zigbee Contact Sensor is a robust door and window monitor compatible with major Zigbee hubs including Echo devices, SmartThings, and Home Assistant. Featuring a 2-year battery life powered by 2 AAA alkaline batteries, it offers hassle-free setup via Alexa voice commands and supports OTA firmware updates. With customizable Alexa routines and real-time monitoring through the Third Reality app, it ensures seamless, reliable home automation and security.

## 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: A bit big, but it's ThirdReality so it just works - 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!
Review: Simple, Reliable, Power Efficient - 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.

## 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 |
| Batteries | 2 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #24,528 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #51 in Home Automation Hubs & Controllers |
| Brand | THIRDREALITY |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,113) |
| Date First Available | January 21, 2021 |
| Included Components | AAA Battery × 2, Door Sensor, Double-sided Tape, Screws |
| Item Package Quantity | 1 |
| Item Weight | 2.08 ounces |
| Item dimensions L x W x H | 1.97 x 0.83 x 2.36 inches |
| Item model number | P1DSA2 |
| Manufacturer | Third Reality, Inc |
| Material | Plastic |
| Mounting Type | Door Mount |
| Output Type | Push Button |
| Part Number | 3RDS17BZ |
| Power Source | Battery Powered |
| Product Dimensions | 1.97 x 0.83 x 2.36 inches |
| Smart Home Compatibility | Smart Home Compatible |
| Style | Door Sensor |
| UPC | 850001595285 |

## 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

### ⭐⭐⭐⭐⭐ 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!

### ⭐⭐⭐⭐⭐ Simple, Reliable, Power Efficient
*by S***B on December 14, 2025*

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.

### ⭐⭐⭐⭐⭐ Best choice
*by S***R on January 18, 2026*

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.

## 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
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*Product available on Desertcart Romania*
*Store origin: RO*
*Last updated: 2026-02-20*