---
product_id: 437757041
title: "THIRDREALITY Zigbee Contact Sensor 2 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: "€ 65.08"
currency: EUR
in_stock: true
reviews_count: 13
category: "Thirdreality"
url: https://www.desertcart.it/products/437757041-thirdreality-zigbee-contact-sensor-2-pack-door-and-window-monitor
store_origin: IT
region: Italy
---

# Zigbee 3.0 compatible 2-year battery life OTA firmware updates THIRDREALITY Zigbee Contact Sensor 2 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:** € 65.08
**Availability:** ✅ In Stock

## Summary

> 🔐 Stay ahead of your home’s security game with THIRDREALITY’s reliable Zigbee sensor!

## Quick Answers

- **What is this?** THIRDREALITY Zigbee Contact Sensor 2 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?** € 65.08 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/437757041-thirdreality-zigbee-contact-sensor-2-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 triggered by door/window activity for ultimate control.
- • **Effortless Setup in Seconds:** Just say 'Alexa, discover devices' and get instant smart home integration.
- • **Seamless Zigbee Compatibility:** Works flawlessly with Echo (4th Gen), SmartThings, Home Assistant, Aeotec, and more.
- • **Unmatched 2-Year Battery Life:** Powered by two AAA alkaline batteries for long-lasting, worry-free monitoring.
- • **Real-Time Monitoring & History:** Track sensor status and battery levels via the upgraded Third Reality app with detailed logs.

## Overview

The THIRDREALITY Zigbee Contact Sensor 2 Pack offers robust, reliable door and window monitoring with seamless Zigbee 3.0 compatibility. Designed for effortless setup and long-lasting performance, it supports major smart home hubs including Echo devices with built-in Zigbee, SmartThings, and Home Assistant. Featuring a 2-year battery life, OTA firmware updates, and smart Alexa routine integration, it empowers professionals to automate and secure their living spaces with confidence and ease.

## Description

THIRDREALITY Zigbee Contact Sensor 2 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

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
- 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 | B09XCWRHCT |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Best Sellers Rank | #108 in Home Security Systems |
| Brand | THIRDREALITY |
| Color | White |
| Customer Reviews | 4.4 4.4 out of 5 stars (1,114) |
| Date First Available | December 3, 2021 |
| Included Components | Detector |
| Item Package Quantity | 1 |
| Item Weight | 4.6 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 | Metal |
| Measuring Range | Binary: Open - Closed |
| Mounting Type | Door Mount |
| Output Type | Digital |
| Part Number | P1DSA2 |
| Power Source | Battery Powered |
| Product Dimensions | 1.97 x 0.83 x 2.36 inches |
| Sensing Distance | 2 Meters |
| Smart Home Compatibility | Smart Home Compatible |
| Specific Uses For Product | Contact Sensor |
| Style | Door Sensor 2 Pack |
| Voltage | 3 Volts (DC) |

## Product Details

- **Brand:** THIRDREALITY
- **Item Weight:** 0.13 Kilograms
- **Item dimensions L x W x H:** 1.97 x 0.83 x 2.36 inches
- **Material:** Metal
- **Style:** Door Sensor 2 Pack

## Images

![THIRDREALITY Zigbee Contact Sensor 2 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/41fC3cyJTaL.jpg)

## Available Options

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

## 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 2 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 2 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 Italy*
*Store origin: IT*
*Last updated: 2026-05-09*