THIRDREALITY Zigbee Water Leak Sensor with Dripping Detection,120dB Alarm,App Notifications Enabled When Work with Home Assistant and Compatible Zigbee HUB Like SmartThings,Aeotec or Third Reality Hub

THIRDREALITY Zigbee Water Leak Sensor with Dripping Detection,120dB Alarm,App Notifications Enabled When Work with Home Assistant and Compatible Zigbee HUB Like SmartThings,Aeotec or Third Reality Hub

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THIRDREALITY Zigbee Water Leak Sensor with Dripping Detection,120dB Alarm,App Notifications Enabled When Work with Home Assistant and Compatible Zigbee HUB Like SmartThings,Aeotec or Third Reality Hub
Price: $20.99 - $15.98
(as of Dec 23,2025 07:27:21 UTC – Details)

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Customers say

Customers find the water leak sensor works well with SmartThings and Home Assistant, featuring a loud audible alarm and being easy to set up. The device runs on two AAA batteries and customers consider it good value for money. The connectivity and leak detection features receive mixed feedback – while some report seamless integration with SmartThings, others experience unreliable connections, and while some say it detects leaks effectively, others report it fails to detect them. The reliability is also mixed, with some finding it fiddly but reliable while others report failures within six months.

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FunctionalityNoise levelEase of setupBattery lifeValue for moneyConnectivityReliabilityLeak detection
87 customers mention "Functionality"74 positive13 negative

Customers report that the water leak sensor works flawlessly with various smart home systems, including SmartThings, Hubitat, and Phoscon ConBee II Zigbee gateway.

"tried it with some water on top, works great. will buy another one for downstairs kitchen." Read more
"Seamlessly connects to Smartthings system and works well. A little bit of assembly required, and disassembly to change the battery." Read more
"Works with Smartthings. Easy setup and integration as a Smartthings leak detector." Read more
"…Other than that it works well with SmartThings!" Read more
45 customers mention "Noise level"35 positive10 negative

Customers appreciate the water leak sensor's loud audible alarm, with one customer noting it's not obnoxiously loud.

"…You'll also hear a loud alarm from the sensor itself. This gives you plenty of time to take action and prevent water damage…." Read more
"Love that this water sensor has an audible alarm…." Read more
"…Buy once cry once, I guess. Pros: loud siren that goes when wet and stops when dry…." Read more
"…Very sensitive and loud! UPDATED TO 5 Stars. The second sensor paired right away!…" Read more
42 customers mention "Ease of setup"37 positive5 negative

Customers find the water leak sensor easy to set up and use, with no installation issues with SmartThings.

"…The product arrive next day and look well designed and easy to install. Some may wonder what is the position to put…." Read more
"…When connected, they work very well and are easy to set up, but just be aware they won’t stay connected when in an area that has moderately weak WiFi." Read more
"Works with Smartthings. Easy setup and integration as a Smartthings leak detector." Read more
"Easy installation. I have installed these and it already has detected two water leaks from work a contractor had done…." Read more
33 customers mention "Battery life"26 positive7 negative

Customers appreciate the water leak sensor's battery life, as it runs on two AAA batteries and can operate for years, with one customer noting it reports battery level every 12 hours.

"…I like that they use AAA batteries and that they have a local alarm. There are two problems with these devices…." Read more
"…It uses AAA batteries so I am anticipating good battery life out of this but will update if that changes…." Read more
"…The 4-pack offers great value for covering multiple areas. * Good battery life, and the required batteries are included. Cons: *…" Read more
"…Not only do these bottom screws/sensors make it inconvenient for a battery replacement or reset of the device, they are too recessed from the bottom…" Read more
28 customers mention "Value for money"27 positive1 negative

Customers find the water sensor to be good value for money.

"…Works great, good price. Would probably buy more for some additional water uses." Read more
"These are affordable water sensors that work with Samsung's SmartThings and sound an alert locally if water was detected…." Read more
"Easy to install, works very well with a loud alarm, and cost effective…" Read more
"Full disclosure – I "improved" these – but they are a great value, and great device…." Read more
63 customers mention "Connectivity"40 positive23 negative

Customers have mixed experiences with the water leak sensor's connectivity, with some reporting seamless integration with Smartthings and easy pairing with Zigbee controllers, while others mention issues with losing connection and Home Assistant compatibility.

"I like that they use AAA batteries. Easy to pair with SmartThings. Here’s hoping for no leaks!!" Read more
"Hard to change batteries, hard to reset, and loses connection…." Read more
"Paired easily with Hubitat Elevation home automation hub. Uses 2 AAA alkaline batteries which are included…." Read more
"Easy to pair. Easy to use." Read more
33 customers mention "Reliability"11 positive22 negative

Customers have mixed experiences with the water leak sensor's reliability, with some finding it fiddly but reliable, while others report intermittent issues and failures within six months of use.

"False alarms appear to be related to either being be too sensitive or else too dependent on a particular battery voltage…." Read more
"…The pairing has been easy and works everytime. There are no false alerts. They work flawlessly when I test them…." Read more
"…Still have intermittent issues.I have dozens of these buttons. The buttons fall offline constantly and lose button programing…." Read more
"…they also show an invalid entity called "Opened", which never changes state…." Read more
28 customers mention "Leak detection"19 positive9 negative

Customers have mixed experiences with the water leak sensor: some report it successfully detects leaks, while others say it fails to do so.

"Excellent water leak sensors for anyone using Smartthings!…" Read more
"It detects water leaks but I can't get it to communicate with my Google Mini." Read more
"Bought this a little under a year ago. Today the water heater began leaking, and the leak detector's alarm went off super loudly…." Read more
"Added this to my AC pan to detect leaks if the main drain line clogged…." Read more





Simple, Reliable, Power Efficient, Wonderfully Sensitive

5 out of 5 stars

Simple, Reliable, Power Efficient, Wonderfully Sensitive
I purchased these to help monitor locations around the home that could have water leaks, including where the main water line comes into the house, my mechanical room, underneath various sinks and in our laundry room. 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. The ability to adjust the sensitivity by either adding or removing the arms is a wonderful bonus. For those folks frustrated that the siren/alarm cannot be disabled, I simply opened the devices and carefully de-soldered the leads that went to the alarm. I know this voids my warranty, but I wanted to use these wonderfully reliable and widely compatible sensors, just without a siren/alarm, so that's a risk I was willing to take. Removal was easy and after the leads were insulated, snap it back together and no more siren/alarm. And, if I do end up wanting the alarm back, all I have to resolder the wires and I'm good to go. Thanks for another great product, ThirdReality!
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Top reviews from the United States


  • Timothy K.

    5.0 out of 5 stars

    Loud, accurate, work with Home Assistant

    Reviewed in the United States on November 29, 2025

    Style: Drip detect 4 packVerified Purchase

    I bought these to replace several unreliable Z-wave detectors I had in Home Assistant. These paired very easily, and work flawlessly. They already warned me of a spill and have accurately gone off when we mopped too close to one. They’re very loud and I can hear one several floors away. I’m pleased with them and while they’re a bit bulky they fit into the places I need. I currently have 8 deployed across the house and plan to add 8 more to cover all possible leak locations. I love that they accurately report battery life and use standard AA batteries that I can readily swap out and use rechargeable ones.


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  • Sidecar1115

    5.0 out of 5 stars

    My Overall Pick

    Reviewed in the United States on September 2, 2023

    Style: Drip detect 1 packVerified Purchase

    The Thirdreality sensor case has a distinct form factor, but in a house with a number of other small sensors of various types, that could be a good thing. Good build quality, and reliable operation so far.

    Stuff I've liked:
    It had the best range for pairing and operating of the ones that I've tried. It had a loud, on-board alarm. The version with the drip leak function can optionally detect very small amounts of water, depending upon physical configuration. It has paired easily and worked well with my Hubitat system. It uses common AAA batteries.

    Possible issues:
    Where an audible alarm is not wanted, another brand/model sensor would be needed.

    The case is much thicker than others in its class, and may not fit beneath a refrigerator or other device.

    The first unit I received used slot-head screws. A very small screwdriver was included in the box, a really thoughtful touch. But, a jeweler's kit, like many folks use to tighten eyeglass screws, would be much easier. The sensors in a subsequent order had screws that could be worked with either a Phillips or straight-bladed driver.

    Where a low-profile case, or a sensor with a remote head, is not needed, this is my choice so far for an inexpensive Zigbee unit.

    Background:
    Most homes have many potential sources of leaks – water heater, dish washer, clothes washer, refrigerator, bathroom plumbing, etc. – that could cause expensive damage. I decided to buy and try five different, inexpensive, Zigbee leak detectors that might work directly with my Hubitat home automation hub. They were by iAlarm, Neo, Thirdreality, and Treatlife, and a generic "Water Leak Detector Zigbee" was added to the mix. At the time of my purchase (August, 2023), each was slightly less than $20.

    All worked properly with my system using the Hubitat "Generic Zigbee Moisture Sensor" driver. All but the Thirdreality also worked with the custom "Tuya NEO Coolcam Zigbee Water Leak Sensor" driver, which adds an explicit state indication of online or offline. But, both drivers support current wet/dry status and battery % reporting. A tip would be to install the custom driver first, if desired, then let Hubitat choose it during device pairing. Also, each of these should be paired within a couple of feet of the hub, then moved to the desired location.

    Some thoughts about the group:

    Overall build quality of the group seemed quite good, with the exception of the generic "Water Leak Detector Zigbee", which was only mediocre.

    The Thirdreality and Treatlife devices have onboard alarms, and could be used as stand-alone detectors, although there appear to be several detectors available that are only stand-alone, and less expensive than the Zigbee devices. The Thirdreality alarm is much louder than the Treatlife's.

    The Thirdreality unit had a longer range than the others, both in pairing and in operation. It and the Treatlife both use common AAA batteries, but I haven't used these sensors long enough to be able to compare battery life.

    The Neo device was the only one with a "remote" sensor – limited to the length of the attaching cord, but still may be needed functionality. However, the cord actually plugs into the wall mount, not the unit itself, so the mount must be used when remote sensing.

    22 people found this helpful

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  • Michael A.

    4.0 out of 5 stars

    Works fine, but has few issues.

    Reviewed in the United States on October 6, 2022

    Style: Drip detect 1 packVerified Purchase

    I ordered two of these. The sensor works well detecting leaks, but like others mentioned, it will need a large puddle to trigger it. This was very easy to fix by bending the metal drip detectors down a bit so they touch the floor. The audible alarm is high pitch and quite loud. The sensor connected easily to Home Assistant using ZHA and Conbee II. My only complaint is that both sensors report battery strength at 63%. I tried multiple fresh batteries, including Energizer lithium, but that didn’t make any difference.

    5 people found this helpful

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  • Scotchpb

    5.0 out of 5 stars

    Simple, Reliable, Power Efficient, Wonderfully Sensitive

    Reviewed in the United States on December 14, 2025

    Style: Drip detect 4 packVerified Purchase

    I purchased these to help monitor locations around the home that could have water leaks, including where the main water line comes into the house, my mechanical room, underneath various sinks and in our laundry room. 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.

    The ability to adjust the sensitivity by either adding or removing the arms is a wonderful bonus.

    For those folks frustrated that the siren/alarm cannot be disabled, I simply opened the devices and carefully de-soldered the leads that went to the alarm. I know this voids my warranty, but I wanted to use these wonderfully reliable and widely compatible sensors, just without a siren/alarm, so that's a risk I was willing to take. Removal was easy and after the leads were insulated, snap it back together and no more siren/alarm. And, if I do end up wanting the alarm back, all I have to resolder the wires and I'm good to go.

    Thanks for another great product, ThirdReality!

    Customer image


    Scotchpb

    5.0 out of 5 stars

    Simple, Reliable, Power Efficient, Wonderfully Sensitive

    Reviewed in the United States on December 14, 2025


    I purchased these to help monitor locations around the home that could have water leaks, including where the main water line comes into the house, my mechanical room, underneath various sinks and in our laundry room. 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.

    The ability to adjust the sensitivity by either adding or removing the arms is a wonderful bonus.

    For those folks frustrated that the siren/alarm cannot be disabled, I simply opened the devices and carefully de-soldered the leads that went to the alarm. I know this voids my warranty, but I wanted to use these wonderfully reliable and widely compatible sensors, just without a siren/alarm, so that's a risk I was willing to take. Removal was easy and after the leads were insulated, snap it back together and no more siren/alarm. And, if I do end up wanting the alarm back, all I have to resolder the wires and I'm good to go.

    Thanks for another great product, ThirdReality!

    Images in this review

    Customer image


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  • J J

    5.0 out of 5 stars

    Great insurance plan

    Reviewed in the United States on July 1, 2025

    Style: Drip detect 4 packVerified Purchase

    The batteries last long in these…I haven't changed them yet and they have been going for months now. They have saved my bathroom cabinet at least twice so far. One with a very slow leak in the drain gasket that went bad. The other time was a loose p-trap. On both occasions the product worked as designed. I have it integrated with Hubitat and configuration was a breeze. I have a rule setup to notify me continuously on my cell via the Hubitat app until the fault is addressed. Very sensitive and solid connection across the entire home. I have one in the kitchen, the bathrooms, and even one in the attic in the water heater overflow pan. The alarm volume is loud enough and will get your attention when it goes off. Again great product. Love TR's products overall.


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  • Reader

    3.0 out of 5 stars

    Work with Home Assistant but incorrect battery status reported on some of them.

    Reviewed in the United States on July 15, 2023

    Style: Drip detect 4 packVerified Purchase

    These take an extra couple minutes to pair but they work very well. I like that they use AAA batteries and that they have a local alarm.

    There are two problems with these devices.

    1) HA sees an extra entity after pairing. In addition to moisture detected, they also show an invalid entity called "Opened", which never changes state. This is even though these are part of the "Works with Home Assistant" list. This does not affect the use of the device for the intended purpose.

    2) Three out of twelve sensors report low battery status, even after replacing the batteries twice with fresh new ones. Two read 43% and one reads 63% with brand new and tested batteries. This makes it very hard to rely upon the reported battery status or use it in any automation routines.

    8 people found this helpful

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Top reviews from other countries

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  • Francesco C.
    5.0 out of 5 stars

    Testati, funzionano alla grande

    Reviewed in Italy on June 10, 2024

    Style: Drip detect 2 packVerified Purchase

    messe pile, collegati all’hub sonoff (SONOFF Zigbee Hub, Hub Bridge… https://www.amazon.it/dp/B09ZQQZSQZ) in un baleno, aggiunte le due lamelle, testati e posizionati. Zero problemi, spero non mi avvisino mai…



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  • MarBel
    1.0 out of 5 stars

    Gibt den Alarm nicht weiter an IOBroker

    Reviewed in Germany on August 8, 2024

    Verified Purchase

    Lässt sich zwar mit IOBroker koppeln, aber meldet nicht den Alarm weiter….piept nur…dann brauche ich auch kein ZigBee



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  • viki65
    4.0 out of 5 stars

    Sensore ok ma scarsa documentazione sulla connettività

    Reviewed in Italy on August 24, 2025

    Style: Drip detect 1 packVerified Purchase

    Non l'ho ancora usato ma il sensore sembra buono. Il problema è la scarsita di informazioni circa la configurabilità. Non essendoci dettagli e non essendoci esperto ho preso un hub MZ1 dello stesso produttore che però sopporta solo il protocollo Matter che ho scoperto non essere direttamente supportato da applicazioni qualora google home o altre (è necessario un hub addizionale)



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  • andrewgo
    5.0 out of 5 stars

    Funktioniert prima!

    Reviewed in Germany on September 6, 2025

    Style: Drip detect 1 packVerified Purchase

    Ein Zigbee Wasser-Sensor… Sehr gut daran ist die Tatsache, daß der Sensor mit AAA Batterien gefüttert wird, und nicht mit irgendwelchen exotischen Knopfzellen. Spontanes Anlernen in Home Assistant, via Z2MQTT, keinerlei Probleme. Bisher funktioniert mein Sensor ohne Macken…



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  • Paul
    5.0 out of 5 stars

    Works well

    Reviewed in the United Kingdom on August 4, 2025

    Style: Drip detect 1 packVerified Purchase

    A good value for money and very easy to use leak detection device. Simply add batteries (supplied) connect the extension arm if desired and it's up and ready to go. Noise level is adequate ( not officially measured it's decibel level) but I've been able to hear it from another room. Pleased with my purchase.



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Product Summary: THIRDREALITY Zigbee Water Leak Sensor with Dripping Detection,120dB Alarm,App Notifications Enabled When Work with Home Assistant and Compatible Zigbee HUB Like SmartThings,Aeotec or Third Reality Hub

From THIRDREALITY
HASSLE-FREE SET UP AND FIT ANYWHERE: Setup is super easy, just place it wherever you want. With a compact design and optional small size, you are able to place Water Leak sensor on the floor of your kitchen, basement, laundry room, or any other flat surface where you would like to monitor for leaks. Suggest to place your sensors near the washing machine, water heater, sinks, or dishwasher.
INSTANT ALARMS: After Water Leak Sensor setup is successful, the Third Reality APP will push APP and free Email notifications to you and the sensor will sound an alarm when a water leak occurs. Water Leak Sensor can also be used when the internet is off. It features with a loud 120dB alarm, and loud enough to be heard even if leakage happens in basement or up stair within your home.
APP FUNCTION:In the device detail page, Third Reality APP also displays the battery level, sensor’s real-time status and history view etc.
3-YEAR LONG BATTERY LIFE: Water Leak Sensor uses two AAA 1.5V Alkaline batteries for power, and the batteries are easy to replace.
APARTMENT AND HOTEL MANAGER FRIENDLY: Connected to the Third Reality Hub/Smart Speaker, Water Leak Sensor can be monitored not only through the Third Reality APP, but also through the 3R-Protect Manager APP. You can go to the detail page of the “Water Leak Sensor Kit” to learn more about 3R-Protect Manager APP.
More Smart Assistant Supported: Enabled by Smart Bridge MZ1 (Sold Separately), integrates with Apple HomeKit and Google Home, to achieve easy control and monitoring. Additionally, it supports software OTA (Over-The-Air) updates.

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