---
product_id: 435534890
title: "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"
brand: "thirdreality"
price: "R$1227"
currency: BRL
in_stock: true
category: "Thirdreality"
url: https://www.desertcart.com.br/products/435534890-thirdreality-zigbee-contact-sensor-4-pack-door-and-window-monitor
store_origin: BR
region: Brazil
---

# Zigbee 3.0 compatible 2-year battery life OTA firmware updates 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

**Brand:** thirdreality
**Price:** R$1227
**Availability:** ✅ In Stock

## Summary

> 🏠 Stay ahead of the unexpected with smart security that just works.

## Quick Answers

- **What is this?** 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 by thirdreality
- **How much does it cost?** R$1227 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.br](https://www.desertcart.com.br/products/435534890-thirdreality-zigbee-contact-sensor-4-pack-door-and-window-monitor)

## 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

- • **Smart Alexa Routines:** Automate alerts, lights, and voice alarms to stay connected and in control 24/7.
- • **Effortless Setup in Seconds:** Say 'Alexa, discover devices' and get instant smart security without the hassle.
- • **Seamless Zigbee Integration:** Works flawlessly with top hubs like Echo (4th Gen), SmartThings, Home Assistant & more.
- • **Real-Time Monitoring & Alerts:** Track battery life and sensor history via the upgraded Third Reality app for peace of mind.
- • **Reliable 2-Year Battery Power:** Powered by AAA batteries that keep your home monitored for years, not weeks.

## Overview

The THIRDREALITY Zigbee Contact Sensor 4 Pack offers reliable door and window monitoring with easy setup, 2-year battery life, and broad compatibility with Zigbee hubs including Echo devices, SmartThings, and Home Assistant. Featuring OTA updates and smart Alexa routines, it empowers seamless home automation and real-time alerts through the Third Reality app.

## Description

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 - desertcart.com

## 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 Studio, Eero 6, Eero Pro 6, Home Assistant, Home Assistant, SmartThings 2015/2018, Aeotec, Hubitat, Homey Bridge, Homey Pro, Third reality Hub and Third Reality Smart Speakers.
- 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 | B09XCZJMC5 |
| Best Sellers Rank | #30,661 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #47 in Home Automation Devices |
| Brand Name | THIRDREALITY |
| Customer Reviews | 4.4 4.4 out of 5 stars (180) |
| EU Spare Part Availability Duration | 2 years |
| Included Components | Door Sensor × 4; AAA Battery × 8; Double-sided Tape × 4; Screw × 8 |
| Item Dimensions | 1.97 x 0.83 x 2.36 inches |
| Item Weight | 0.29 kg |
| Manufacturer | Third Reality, Inc |
| Material Type | Plastic |
| Maximum Supply Voltage | 3 volts_of_direct_current |
| Measuring Range | Binary: Open/Closed |
| Model | 3RDS17BZ |
| Mounting Type | Door Mount |
| Number of Items | 1 |
| Number of Packs | 4 |
| Output Type | Digital |
| Part Number | 3RDS17BZ |
| Specific Uses For Product | Contact Sensor |
| Style Name | Door Sensor 4 Pack |
| Unit Count | 4 Count |

## Product Details

- **Brand:** THIRDREALITY
- **Item Weight:** 0.29 kg
- **Item dimensions L x W x H:** 1.97 x 0.83 x 2.36 inches
- **Material:** Plastic
- **Style:** Door Sensor 4 Pack

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/51j1EWmLzgL.jpg)

## Available Options

This product comes in different **Style** options.

## Frequently Bought Together

- 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
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**Shop now:** [https://www.desertcart.com.br/products/435534890-thirdreality-zigbee-contact-sensor-4-pack-door-and-window-monitor](https://www.desertcart.com.br/products/435534890-thirdreality-zigbee-contact-sensor-4-pack-door-and-window-monitor)

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*Product available on Desertcart Brazil*
*Store origin: BR*
*Last updated: 2026-10-12*