---
product_id: 457585056
title: "THIRDREALITY Zigbee Contact Sensor 4 Pack, Door and Window Sensor for Home Security and Smart Home Automation, Works with Build-in Zigbee Hub,hub Required."
brand: "thirdreality"
price: "51569 kr"
currency: ISK
in_stock: true
reviews_count: 5
category: "Thirdreality"
url: https://www.desertcart.is/products/457585056-thirdreality-zigbee-contact-sensor-4-pack-door-and-window-sensor
store_origin: IS
region: Iceland
---

# Zigbee 3.0 compatible 2-year battery life Hassle-free setup THIRDREALITY Zigbee Contact Sensor 4 Pack, Door and Window Sensor for Home Security and Smart Home Automation, Works with Build-in Zigbee Hub,hub Required.

**Brand:** thirdreality
**Price:** 51569 kr
**Availability:** ✅ In Stock

## Summary

> 🚪🔒 Elevate your smart home security with effortless, long-lasting door & window sensing!

## Quick Answers

- **What is this?** THIRDREALITY Zigbee Contact Sensor 4 Pack, Door and Window Sensor for Home Security and Smart Home Automation, Works with Build-in Zigbee Hub,hub Required. by thirdreality
- **How much does it cost?** 51569 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/457585056-thirdreality-zigbee-contact-sensor-4-pack-door-and-window-sensor)

## 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:** Customize alerts, lighting, and voice alarms triggered by door/window activity for a truly connected lifestyle.
- • **Reliable 2-Year Power:** Powered by 2 AAA batteries delivering up to 24 months of uninterrupted security.
- • **Effortless Installation:** Stick-on design with quick pairing—get your home secured in seconds without any tech headaches.
- • **Seamless Zigbee Integration:** Works flawlessly with major Zigbee hubs including Echo (4th Gen), SmartThings, and more for instant smart home sync.
- • **Real-Time Monitoring & History:** Track sensor status and battery life via the upgraded Third Reality app for proactive home management.

## Overview

The THIRDREALITY Zigbee Contact Sensor 4 Pack offers professional-grade door and window monitoring with 2-year battery life, broad Zigbee hub compatibility, and ultra-simple installation. Designed for millennial managers who demand reliable, smart home automation, it supports Alexa routines and real-time app monitoring to keep your home secure and connected with zero hassle.

## Description

Door and window sensor can directly work with compatible ECHO. And its compact design can fit in most doors and windows. Most of the doors or windows have a height difference from the doors' or windows' frame. With the special design the height difference can be reduced to make sure the two parts of the door sensor have a stable contact. Simply peel off the protective layer of double-sided tape and stick the two parts of the door sensor to the door and the door frame. You can monitor every door and windows in your home and create routines to send messages to your smartphone when the door or window is open. You also can create routines that are triggered by the on/off status of the door sensor.

Review: 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: 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!

## Features

- ZIGBEE STANDARD COMPATIBLE DOOR SENSOR: Works with most of Zigbee hubs or Echo devices with build-in Zigbee hub. Work with Echo (4th Gen), Echo Plus (1st Gen and 2nd Gen), Echo Show 10 (2nd Gen and 3rd Gen), Echo Studio, Eero 6, Eero Pro 6, SmartThings 2015/2018, Aeotec, Hubitat, 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

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B09XCZJMC5 |
| Are batteries included? | No |
| Batteries | 8 AAA batteries required. |
| Brand | THIRDREALITY |
| Compatible Device | Home Security System, Smartphone |
| Country of Origin | USA |
| Customer Reviews | 4.3 4.3 out of 5 stars (153) |
| Date First Available | 8 May 2022 |
| Included Components | Detector |
| Item Dimensions LxWxH | 50 x 21 x 60 Millimeters |
| Item Height | 6 Centimeters |
| Item Weight | 290 g |
| Item Width | 21 Millimeters |
| Item dimensions L x W x H | 50 x 21 x 60 Millimeters |
| Item model number | 3RDS17BZ |
| Manufacturer | Third Reality, Inc |
| Model number | 3RDS17BZ |
| Mounting Type | Door Mount |
| Number of Memory Sticks | 1 |
| Power Source | Battery Powered |
| Product Dimensions | 5 x 2.1 x 6 cm; 290 g |
| Style | Door Sensor 4 pack |

## Product Details

- **Brand:** THIRDREALITY
- **Item Weight:** 0.29 Kilograms
- **Item dimensions L x W x H:** 50 x 21 x 60 Millimeters
- **Mounting Type:** Door Mount
- **Style:** Door Sensor 4 pack

## Images

![THIRDREALITY Zigbee Contact Sensor 4 Pack, Door and Window Sensor for Home Security and Smart Home Automation, Works with Build-in Zigbee Hub,hub Required. - Image 1](https://m.media-amazon.com/images/I/51j1EWmLzgL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*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 .

### ⭐⭐⭐⭐⭐ Review
*by C***Y on 12 January 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!

### ⭐⭐⭐⭐⭐ Review
*by D***O on 9 October 2025*

Ottimo articolo perfettamente supportato da Zigbee2MQTT per Home Assistant, il sensore del campo magnetico consente di avere una distanza considerevole tra il sensore ed il magnete, il che lo rende perfetto per finestre e porte dove la chiusura non è a filo. Funziona con batterie AAA rendendolo compatibile con comuni batterie ricaricabili e sembra consumare veramente poca batteria una volta installato. Ha inoltre un led che si accende quando lo stato cambia da aperto a chiuso, per segnalare il rilevamento. Fornito con due batterie alcaline AAA, viti per montatura e nastro biadesivo già correttamente tagliato sulla forma dei due componenti (non applicato, quindi se lo volete montare con le viti non serve rimuovere il nastro adesivo). Possibili miglioramenti: Supporto opzionale di Matter over Thread, evitare le batterie integrate in confezione per un prezzo dell'articolo inferiore (così chi vuole compra e/o usa le ricaricabili risparmiando qualcosina).

## 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 Iceland*
*Store origin: IS*
*Last updated: 2026-03-01*