---
product_id: 461983830
title: "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"
brand: "thirdreality"
price: "¥7723"
currency: JPY
in_stock: true
reviews_count: 13
category: "Thirdreality"
url: https://www.desertcart.jp/products/461983830-thirdreality-zigbee-contact-sensor-door-and-window-monitor-home-automation
store_origin: JP
region: Japan
---

# Zigbee 3.0 compatibility 2-year battery life OTA firmware upgrades 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

**Brand:** thirdreality
**Price:** ¥7723
**Availability:** ✅ In Stock

## Summary

> 🔐 Stay ahead with smart security that just works — because your home deserves the best.

## Quick Answers

- **What is this?** 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 by thirdreality
- **How much does it cost?** ¥7723 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/461983830-thirdreality-zigbee-contact-sensor-door-and-window-monitor-home-automation)

## 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 2-Year Power:** Powered by 2 AAA alkaline batteries, enjoy up to 24 months of uninterrupted security without the hassle of frequent replacements.
- • **Future-Proof OTA Updates:** Keep your sensor optimized with over-the-air firmware upgrades, ensuring cutting-edge performance without manual intervention.
- • **Advanced Hall Effect Sensor:** Modern sensor technology allows flexible mounting with up to 25mm detection range, outperforming traditional reed switches.
- • **Seamless Zigbee Integration:** Works flawlessly with leading Zigbee hubs and Echo devices, ensuring smooth connectivity across your smart home ecosystem.
- • **Instant Smart Alerts & Routines:** Trigger Alexa routines or receive instant notifications when doors or windows open, keeping you connected and in control.

## Overview

The THIRDREALITY Zigbee Contact Sensor is a sleek, battery-powered door and window monitor designed for seamless integration with popular Zigbee hubs and Echo devices. Featuring a long-lasting 2-year battery life, advanced hall effect sensing technology, and support for over-the-air firmware updates, it delivers reliable, flexible, and future-proof home security automation. Compatible with major smart home platforms like Home Assistant, SmartThings, and Hubitat, it empowers users to create personalized Alexa routines and receive instant alerts, making it an essential upgrade for any connected home.

## 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.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 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 Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Alkaline |
| Battery description | Alkaline |
| Best Sellers Rank | 74,948 in DIY & Tools ( See Top 100 in DIY & Tools ) 73 in Home Security Door & Window Sensors |
| Colour | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (842) |
| Date First Available | 21 Jan. 2021 |
| Included Components | AAA Battery × 2, Door Sensor, Double-sided Tape, Screws |
| Item Package Quantity | 1 |
| Item Weight | 58.9 g |
| Item model number | P1DSA2 |
| Manufacturer | Third Reality, Inc |
| Material | Plastic |
| Part Number | 3RDS17BZ |
| Plug profile | Wall Mount |
| Power Source | Battery Powered |
| Product Dimensions | 5 x 2.1 x 6 cm; 58.97 g |
| Style | Door Sensor |
| Usage | home automation, indoor door/window monitoring |

## Product Details

- **Brand:** THIRDREALITY
- **Item dimensions L x W x H:** 50 x 21 x 60 millimetres
- **Item weight:** 2.08 Ounces
- **Material:** Plastic
- **Style:** Door Sensor

## Images

![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 - Image 1](https://m.media-amazon.com/images/I/41-tjH1nx-L.jpg)

## 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

### ⭐⭐⭐⭐⭐ 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, 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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- THIRDREALITY Zigbee Motion Sensor, Pet Friendly, Compatible with Home Assistant, SmartThings, Aeotec, Homey, Hubitat or Echo Devices with Built-in Zigbee Hub

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-02-01*