---
product_id: 475389727
title: "THIRDREALITY Zigbee Contact Sensor 4 Pack,Door and Window Monitor,Works with Home Assistant,SmartThings,Aeotec,Homey Bridge,Homey Pro,Hubitat or Echo Devices with Build-in Zigbee Hub,hub Required"
brand: "thirdreality"
price: "VT41365"
currency: VUV
in_stock: true
reviews_count: 13
category: "Thirdreality"
url: https://www.desertcart.vu/products/475389727-thirdreality-zigbee-contact-sensor-4-pack-door-and-window-monitor
store_origin: VU
region: Vanuatu
---

# Zigbee 3.0 standard compatible 2-year battery life OTA firmware upgrade THIRDREALITY Zigbee Contact Sensor 4 Pack,Door and Window Monitor,Works with Home Assistant,SmartThings,Aeotec,Homey Bridge,Homey Pro,Hubitat or Echo Devices with Build-in Zigbee Hub,hub Required

**Brand:** thirdreality
**Price:** VT41365
**Availability:** ✅ In Stock

## Summary

> 🔐 Secure your space smarter, not harder — join the Zigbee revolution!

## Quick Answers

- **What is this?** THIRDREALITY Zigbee Contact Sensor 4 Pack,Door and Window Monitor,Works with Home Assistant,SmartThings,Aeotec,Homey Bridge,Homey Pro,Hubitat or Echo Devices with Build-in Zigbee Hub,hub Required by thirdreality
- **How much does it cost?** VT41365 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/475389727-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

- • **Effortless Setup in Seconds:** Say 'Alexa, discover devices' and get instant smart security integration without the hassle.
- • **Reliable 2-Year Battery Power:** Powered by 2 AAA alkaline batteries, enjoy long-lasting performance with easy replacements.
- • **Seamless Zigbee Compatibility:** Works flawlessly with top hubs like Echo (4th Gen), SmartThings, Hubitat, Home Assistant, and more.
- • **Smart Alexa Routines & Alerts:** Trigger lights, notifications, or voice alarms automatically when doors or windows open—stay ahead of every moment.
- • **Advanced Sensor Tech & Firmware Updates:** Modern hall effect sensor ensures precise detection; OTA upgrades keep your system future-proof and optimized.

## Overview

The THIRDREALITY Zigbee Contact Sensor 4 Pack offers professional-grade door and window monitoring with seamless integration across major Zigbee hubs and Echo devices. Featuring a modern hall effect sensor for precise detection, a robust 2-year battery life powered by AAA alkaline batteries, and hassle-free setup via Alexa voice commands, it empowers you to automate security routines effortlessly. OTA firmware upgrades ensure your sensors stay optimized, making this pack an essential upgrade for any smart home enthusiast seeking reliable, scalable, and intelligent security solutions.

## Description

THIRDREALITY Zigbee Contact Sensor 4 Pack,Door and Window Monitor,Works with Home Assistant,SmartThings,Aeotec,Homey Bridge,Homey Pro,Hubitat or Echo Devices with Build-in Zigbee Hub,hub Required : desertcart.co.uk: DIY & Tools

Review: Pairs and OTA upgrade directly with Hubitat C7/C8/C8 Pro - Batteries Included - I bought 12 of these to replace all of another brand (S*O*N*O*F*F) which uses 2032 button cells, they paired with any of the Hubitat models within about 10-15 seconds whether they were 1m or 10m away. The driver it picked up was the built in Generic Zigbee Contact Sensor (no temp) They all needed an upgrade from 0x30 to 0x3F which was easily done via Hubitat within about 10mins, about 60 secs per 10% block, the progress can only be seen in the live logs for the Hub. This gives you: Optimized the network joining and reconnecting algorithms Optimized the power detection logic Optimized the trigger filtering algorithm From what I have experienced, the upgrade procedure is well protected and never bricked any of them, each 10% block is transferred and checksumed, at 100% the upgrade is transferred to its flash memory. The device still has live operation during the upgrade process. I made a mistake on the first one by unpairing/re-pairing while it was upgrading, simply because I did not realise anything was happening viewing the device page. When I found where I could see the progress, it had stopped at 30%, after 2 mins I realised the upgrade had been cancelled by my actions without any harm. The upgrade was just started again and completed without error. The great thing about these 3rdReality devices is that they use a modern hall effect sensor to trigger via the magnet instead of an antique reed switch, so they can be mounted offset slightly on windows and doors, the max detection range is about 25mm so best to stick with 15mm or less if the magnet is not on the same plane. As long as you dont have any poor/ chatty/ proprietary Zigbee protocol devices on the Hub and have good plug in repeater mains sockets between far off devices to create a good Zigbee mesh they operate automations in Rule Manager within a second , no matter how far away they are from the Hub. I am very impressed with this brand and have purchased 8 Temperature/Humidity lite sensors, again uses 2 x AAA supplied and also a couple of the waterproof soil moisture/temperature sensors to assist in the automated garden watering .
Review: Long lasting on battery - These are really good sensors, having 2 AAA batteries makes them more reliable. If you are using home assistant/z2m they aren't bindable

## 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, SmartThings 2015/2018, Aeotec, Hubitat, Homey Bridge, Homey Pro, Third reality Hub and Third Reality Smart Speaker.
- 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.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09XCZJMC5 |
| Average Battery Life | 2 years |
| Batteries | 8 AAA batteries required. |
| Batteries Required? | No |
| Batteries included? | No |
| Battery Cell Type | Alkaline |
| Battery description | Alkaline |
| Best Sellers Rank | 108,762 in DIY & Tools ( See Top 100 in DIY & Tools ) 86 in Home Security Door & Window Sensors |
| Colour | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (843) |
| Date First Available | 8 May 2022 |
| Included Components | 4 x Door Sensors, 8 x AAA Batteries, 4 x Double Sided Tape, 8 x Screws |
| Item Package Quantity | 1 |
| Item Weight | 290 g |
| Item model number | 3RDS17BZ |
| Manufacturer | Third Reality, Inc |
| Material | Plastic |
| Part Number | 3RDS17BZ |
| Plug profile | Door Mount |
| Power Source | Battery Powered |
| Product Dimensions | 5 x 2.1 x 6 cm; 290 g |
| Style | Door Sensor 4 Pack |
| Usage | Contact Sensor |

## Product Details

- **Brand:** THIRDREALITY
- **Item dimensions L x W x H:** 50 x 21 x 60 millimetres
- **Item weight:** 0.29 Kilograms
- **Material:** Plastic
- **Style:** Door Sensor 4 Pack

## Images

![THIRDREALITY Zigbee Contact Sensor 4 Pack,Door and Window Monitor,Works with Home Assistant,SmartThings,Aeotec,Homey Bridge,Homey Pro,Hubitat or Echo Devices with Build-in Zigbee Hub,hub Required - Image 1](https://m.media-amazon.com/images/I/51j1EWmLzgL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Pairs and OTA upgrade directly with Hubitat C7/C8/C8 Pro - Batteries Included
*by R***B on 5 January 2025*

I bought 12 of these to replace all of another brand (S*O*N*O*F*F) which uses 2032 button cells, they paired with any of the Hubitat models within about 10-15 seconds whether they were 1m or 10m away. The driver it picked up was the built in Generic Zigbee Contact Sensor (no temp) They all needed an upgrade from 0x30 to 0x3F which was easily done via Hubitat within about 10mins, about 60 secs per 10% block, the progress can only be seen in the live logs for the Hub. This gives you: Optimized the network joining and reconnecting algorithms Optimized the power detection logic Optimized the trigger filtering algorithm From what I have experienced, the upgrade procedure is well protected and never bricked any of them, each 10% block is transferred and checksumed, at 100% the upgrade is transferred to its flash memory. The device still has live operation during the upgrade process. I made a mistake on the first one by unpairing/re-pairing while it was upgrading, simply because I did not realise anything was happening viewing the device page. When I found where I could see the progress, it had stopped at 30%, after 2 mins I realised the upgrade had been cancelled by my actions without any harm. The upgrade was just started again and completed without error. The great thing about these 3rdReality devices is that they use a modern hall effect sensor to trigger via the magnet instead of an antique reed switch, so they can be mounted offset slightly on windows and doors, the max detection range is about 25mm so best to stick with 15mm or less if the magnet is not on the same plane. As long as you dont have any poor/ chatty/ proprietary Zigbee protocol devices on the Hub and have good plug in repeater mains sockets between far off devices to create a good Zigbee mesh they operate automations in Rule Manager within a second , no matter how far away they are from the Hub. I am very impressed with this brand and have purchased 8 Temperature/Humidity lite sensors, again uses 2 x AAA supplied and also a couple of the waterproof soil moisture/temperature sensors to assist in the automated garden watering .

### ⭐⭐⭐⭐⭐ Long lasting on battery
*by J***N on 23 October 2025*

These are really good sensors, having 2 AAA batteries makes them more reliable. If you are using home assistant/z2m they aren't bindable

### ⭐⭐⭐⭐⭐ Great little sensors
*by D***Y on 12 January 2026*

I’ve been using these door/window contact sensors around the house for a few months now, and they’ve been great. I set them up to turn on cupboard lights when doors open, and to automatically turn on the hallway lights when the front door is opened at night. Once paired with my Zigbee setup (I’m running them through Home Assistant), the automations fire reliably and consistently, no lag or missed triggers. Installation was straightforward: the sensors are slim, powered by standard AAA batteries with up to ~2 years of life, and can be mounted with either the included adhesive tape or screws. Once connected they’ve stayed paired without any problems, and using regular batteries (rather than coin cells) makes swapping them out simple when needed. Overall these contact sensors have worked exactly as I’d hoped. They’re reliable, great value, easy to integrate into automations, and now a core part of my smart-home setup.

## 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
- 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 4 Pack, Zigbee Hub Required, Pet Friendly, Work with Home Assistant, SmartThings, Aeotec, Homey, Hubitat or Echo Devices with Built-in Zigbee hub

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-04*