








💧 Stay dry, stay smart — your water guardian on call 24/7!
This WiFi-enabled 2-in-1 water leak and water level detector features a unique dual-probe design with 16.4ft detection lines, delivering precise left/right alerts via app and a loud 100 dB alarm. Powered by 2 included AAA batteries, it offers easy installation and remote monitoring through Smart Life or Tuya apps, making it an essential smart home device for proactive water damage prevention.






| ASIN | B0BRXSF8NY |
| Batteries | 2 AAA batteries required. (included) |
| Batteries Included? | Yes |
| Batteries Required? | Yes |
| Battery Cell Type | Alkaline |
| Battery Description | AAA |
| Best Sellers Rank | #226,014 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #147 in Water Detectors & Alarms |
| Control Method | App, Touch |
| Customer Reviews | 3.8 3.8 out of 5 stars (314) |
| Date First Available | January 9, 2023 |
| Description Pile | AAA |
| Included Components | Detector |
| Item Weight | 5.9 ounces |
| Item model number | L31 |
| Manufacturer | Tuehakny |
| Maximum Range | 5 Meters |
| Mounting Type | Wall Mount |
| Noise Level | 100 Decibels |
| Number of Batteries | 2 AAA batteries required. (included) |
| Part Number | L31 |
| Product Dimensions | 1.26 x 0.78 x 3.5 inches |
| Sensor Technology | Contact Sensor |
| Smart Home Compatibility | Smart Home Compatible |
| Style | AM 31 |
| Voltage | 3 Volts (DC) |
L**N
Great little device!
First let me start by saying this review is long but I am trying to address some problems other reviewers have had and I am trying to get more information out about this water leak / water level device. I was trying to find something exactly like this device with two floats but I couldn't so this was my best bet and after really digging into it, I found that it works great for my needs. Let's go! Note: These instructions and information are for Android devices. A. You do NOT have to pay to receive Push Notifications from this device using the Smart Life app or the Tuya Smart app. (I use push notifications and thats what the instructions below are for) B. You DO have to pay to receive a Phone call or a Text message. (I do Not pay for this.) If you already have Smart Life or the Tuya Smart app, that's great because you dont have to download an additional app. I have checked and this device goes into a sleep mode so it will disconnect from your WiFi to save power. BUT, it still polls (checks) the two sensors for any changes and when it finds a change it will reconnect to the WiFi and then your app(Smart Life or Tuya Smart) will send the notification. (Make sure your notifications are turned on for the app your using) Something I noticed; when I was receiving an alert for High Water Alarm, I was also receiving a Low Water Normal. So at first I was a bit confused but I soon realized what was happening. IF THE DEVICE GOES TO SLEEP MODE AND EITHER ONE OF THE SENSORS WAKES THE DEVICE UP, YOU WILL RECEIVE AN ALERT FOR THE STATE OF EACH SENSOR. So if my High Water Sensor wakes the device up because water is surrounding it, then I will receive a High Water Notification AND I will receive a Low Water Normal Notification because my low water float is in the UP position. Usually when I get the low water Notification, I head out immediately and fill up the tank. I will get the Low Water Level Normal and shortly after I will get the High Water Level Notification. During this time frame the device is usually still connected to the WiFi so I would not get both Notifications, just the High Water Notification. NOTE: You will not receive the additional notification if you don't set it up in Scenes. Thanks to the reviewer letting us know this device can be flashed. Most people do not want to attempt to flash a device for fear of bricking it (ruining the device). For those of us who can flash a new or better firmware, go for it! But I wanted to at least tell people that this little device can really be quite functional as it is. If you are worried about this device using to much bandwidth, be at ease. This device used a whole whopping download of 97.6kb and uploaded 36.4kb over one week. Let me tell you, this little guy is not trying to "phone home" in any way at all. However, the more alerts you get, the more bandwidth it will use. This device is very cheap and extremely simple to use without either app. Yes, you do need to keep it close to the area that you are using it in because the lines are short, but for most people, this isn't a problem. If you need more line, there are 3.5mm jack extensions just about every where. [Just a side note: Because this device is so cheap, don't expect to get the results of a $300 leak detector. Expect to get the results of the device you paid for. It works as described although it can be difficult to set up by some who may not want to spend the time to set it up properly or do just a little bit of homework to figure it out. I'm sure an expensive leak detector is not just plug and play either.] The device itself is not water proof but the sensors are able to handle being in water. So if you plan on putting this outside, you need to find a way to keep the device away from any sort of water, snow, etc. Ok, I hope these instructions and pictures will help with setting up push notifications with this device. Yes, it can be a little overwhelming but after the first one, It's a little easier and you will see that it is not that bad. Even for someone who is not techy. These instructions will show you how to get a push notification for each different device with a name that you choose for yourself. I am using the float sensor for alerting me of a Low Water Level in my Irrigation Water Tank and the Leak detector for a High Water Notification in my Irrigation Water Tank. I have 4 Scenes set up in Smart Life for the Water Leak / Water Level device. There are two Scenes for the Float Sensor. One for a (Low Water Level) and another that tells me the Float is back to (Normal). There are two Scenes for the Water Leak Sensor. One for a High Water Alarm (water touching the sensor) and another scene that tells me the Leak Sensor is back to Normal (no water touching the sensor). Mine are in a barrel. The float sensor is attached to the inside of the barrel, approximately 6-8 inches from the bottom. When the water drops below the float sensor, I will receive a notification from Smart Life telling me my Tank is low on water. When I add water back to the tank and the float rises up, I will get another notification telling me the float sensor is back to normal. The Leak detector is attached to the inside of the Barrel near the top. When I'm filling the tank up and the water touches the Leak Sensor, I will receive a notification telling me High Water Level (the tank is full), so at that point, I turn the water off. When I start using the water in the tank and the water drops below the Leak Sensor, I will receive another notification telling me the Leak Detector is back to normal. This way I can easily tell if my pump is working. I get separate alerts (not related to the leak detector) telling me my pump is on/off. If I don't get the alert from the Leak Detector telling me it's back to normal, I will know my pump is not working properly and the water level is not dropping. My Float Sensor is plugged into the right jack and my Water Leak Sensor is plugged into the left jack. For example: for the float, Let's say you are using the float to tell you a water level in a barrel. You will set up a scene in Smart Life to send you a notification when the water drops down and the float sensor goes to its bottom position. You can also set up another Scene in Smart Life to notify you when the float goes back up, its called (Normal) in the settings. See picture with the Red and Green underlines. When the device detects an ALARM on one of the sensors the device sounds the alarm and then the app will send you a push notification. When the sensors return to their NORMAL position and you have the app Scenes set up to send you a (Normal) push notification, you will receive the notification. One other thing, this device does not have a (low battery) alert in the APP. However, according to the description, the device will beep every minute when the batteries get low. I hope this hasn't confused you more. I had my wife follow my instructions and she said they worked great. Hopefully they do the same for you! For a timframe reference: These instructions worked in the Smart Life app as of 3 June 2023 Note: If you want to simply receive the devices default notifications from the app all you need to do is connect the device to your WiFi per the instructions that came with the device and that's it. You do not need to follow the instructions below. The instructions below are made so you can receive a notification with a NAME that you choose yourself. Also, the default notifications do not send a notification when your float or leak detector go back to their normal position. At the end of the instructions below, there is a note describing how to create a scene to send you a notification when the float or leak sensor returns to their normal position. INSTRUCTIONS TO TURN OFF THE DEFAULT NOTIFICATIONS: A. So you don't receive the default notifications along with your Scene notification, open Smart Life or Tuya Smart app and click on your Water level/Leak detector. B. It will bring you to the information screen for the device. See Picture with the blue arrow pointing at the word (Set). Now Click (Set) C. Turn OFF the two alerts. See picture with the 2 blue arrows pointing to the bubbles to turn off. INSTRUCTIONS TO SET UP SCENES TO CREATE YOUR PERSONAL NOTIFICATIONS: 1. Open Smart Life or Tuya Smart (I believe they are identical for these instructions) 2. Click 'scene' at the bottom 3. Click the '+' plus sign at the top right 4. Click 'When device status changes'. See Picture with green circle around (When Device Status Changes). 5. Find your water leak / water level device and click on it. Mine is called (Irrigation Water Tank). See Picture with a red line under (Irrigation Water Tank) 6. Then click on (Sensor Alarm State (Right)) 7. Then click on (Sensor Alarm (Right)) This will be when the sensor is detecting an ALARM. 8. This will bring you to the picture that is marked with (Step 1) 9. Click on the little (pen) to the right of the name. See the picture with the green circle around the (pen) 10. This will open a page for you to change the name and to set a specific Effective Period to be alerted. I left my Effective Period on (All Day). See picture with the (Name) in (red) and (Your Choice) in (yellow-ish). Remove the preloaded name and insert the name you want and pick an Effective Period if you want. When your done Click (Ok) at the top right. 11. You will now be back to the screen that looks like the picture that has Step 1 but it will now have the name you picked at the top. 12. Now click on the (+) plus sign to the right of (Then). This is where you will choose a task. See Picture with the (Blue Arrow pointing at the blue plus sign) 13. Click on (Send Notification). See picture with the green circle around Send Notification 14. Now click on Message Center. The picture with the green circle around (Message Center). This is for push notifications only. They come from the Smart Life or Tuya Smart app, which ever one you use. 15. Now click (Next) at the top right. This will bring you back to the main screen for this scene. 16. Now click (Save) at the bottom. Picture with Last Step in yellow-ish 17. Now click on (Yes) when it is asking to start using it. Picture with the green circle around Yes. 18. This will take you back to your Scenes. Follow the above steps again to set up other alarms for your Water Leak / Water Level device. Just choose left/right and/or Alarm/Normal. You do not need to set up an additional scene for the sensor returning to its NORMAL state but for some people it would be nice to know it did return. Note: Your additional Scenes will change in steps 6, 7 and 10. This is if you want to receive an Alarm alert or a normal alert for either the float or the leak sensor. If I missed something, I apologize. Hopefully this will help others who want/need notifications from this device.
A**S
Counter weight?
This device is pretty neat, it connected to my wifi quickly. If your having trouble connecting to a 5g wifi just follow the procedures away from your home like out in the back yard or front yard where your 2.5g wifi is present. Once it's connected it will stay connected for use in your home. I only had to go as far as an upstairs bedroom for my wifi to connect. I'm using this device in and around my 40 gallon fish tank. I had a 40 gallon leak in the middle of the night last month and I lost a lot of aquatic life from it so I'm using this as a precaution on this new tank. The device works as advertised the alarm is not very loud but the push notification on my phone is plenty to warn me of a leak if I can't hear the alarm. I am using the tuya app and it's very easy to navigate. The reason for the 4 stars and not 5 is because the in water probe does not have a counter weight to lower it into the water of my tank, it just floats on the surface. I had to rig up my own counter weight system with some fishing string tied to a price of my aqua scape which is not ideal.
Y**.
Este aparato me ha hecho la vida más fácil y me he ahorrado cientos de dólares. Tan fácil la instalación que no podía creerlo y lo importante que el sistema de sonido tiene ajuste de volumen y adicional tienes el mensaje al celular, aun cuando no estas en casa te avisa y puedes controlarlo. Lo maximo!!!
H**S
Not reliable!
During initial setup, the sensor worked great. As soon as we installed it in the sump basin it failed to continue to notify us if water was present. The alarm only worked partially. I would not recommend buying this! If you want additional notifications, you have to purchase the services.
B**M
Had higher hopes
Sadly this product didn’t work as I hoped. I intended to use it in my hot tub to be alerted when the water level fell too low but the sensor floats instead of staying vertical. It also only triggers the notification on my phone if I’m standing next to it - just going in the house sounds the alarm when pulled out of the water but no notification. I no longer have the box so can’t return but can’t use this.
A**R
Not willing to pay fee.
Good potential. We would have to pay for SMS or Email alerts. Located in basement weak signal upstairs
H**N
Best cost effective sensor for dog’s water bowl
This sensor is a godsend for ADHD people like myself who have dogs and forget to fill the dog water. I use just the float sensor, and I had to modify our dogs water dispenser, but so worth it. I would like to knock a star off because the app isn’t super user friendly, but the pros greatly outweigh the cons. You can turn off the actual alarm from the device and have it set to send you app notifications and it will spam the heck out of your phone (which is annoying but I enjoy because access to water for my dogs is important)
O**E
Works like I need it to
I bought this mainly for the float sensor so I can monitor water levels in a bucket and alert when low. I 3d printed a mount for the float and attached it to the inside of a bucket with a command strip. Alerts quickly with or without sound. My sound is turned off and I'm using the app to notify, works well. App integration works fine with either Tuya or Smart Life. Would buy again.
M**R
Der Sensor funktioniert für Wassermangel besser, wenn man an den Schwimmer ein zusätzl. Gewicht anbringt, wie z.B. eine Unterlegscheibe. ich habe nicht herausgefunden, wie man über die Tuya App die Meldung des Sensors (Wasserstand) erkennen kann. Es besteht die Möglichkeit, ein kostenpflichtiges Abo abzuschließen. Der Verkäufer hat sich kulant und kundenorientiert gezeigt, obgleich die Rücksendefrist abgelaufen war, daher gebe ich gerne fünf Sterne.
A**A
muy mala calidad, instrucciones complicadas muy mal producto en general
H**N
Na waterschade te hebben gehad door een lekkende pomp van mijn aquarium, wilde ik daar voortaan voor gewaarschuwd worden. En dat is precies wat dit alarm doet. De vlotter hangt in het aquarium en geeft alarm als het waterniveau ongeveer 2 cm zakt, de overstromingssensor ligt bij de pomp onderin het aquarium meubel en geeft alarm wanneer daar een plasje water ontstaat. Het alarm is luid en de app zorgt er voor dat ik ook als ik niet in de buurt van het aquarium ben gewaarschuwd wordt. De app heeft nog veel mogelijkheden, echt meer dan ik verwachtte voor de prijs van dit apparaatje. Enig minpuntje: er zit geen contragewicht bij de waterniveausensor.
V**.
I purchased this water detect/level monitor in May 2023 to give me warning when my cistern tank became low and I needed to order more water. Since 2023 till now August 2025 it has worked flawlessly and gives me push notification when the water level has gone down to my low level mark as well as a loud siren sound. I have changed the batteries twice in this time - so once a year and I do it proactively, not because it has started beeping to indicate low battery. I’m impressed that it continues to be accurate as I do double check the cistern level with my big stick that has a low level mark. This has made my life so much easier for a value added cost. Sometimes life can get so busy that checking a cistern is the last thing on my mind and now I have a back up to my memory and it has worked consistently for me. I found it easy to set up as my wifi is split and has 2.4 wifi connection that I make sure my phone is also connected to when initially setting it up. I would highly recommend it based on the longevity, performance and quality that I’ve experienced using it.
L**.
Für meine Zwecke ist er gut geeignet. Ich ich nutze ihn als Wasserstandssensor für einen IBC Tank. Dieser ist voll isoliert so dass ich nicht rein schauen kann wie viel Wasser noch drin ist. Der IBC Tank dient als Wasserreservoir für eine Pferdetränke, also sollte er, wenn er leer ist, auch wieder gefüllt werden. Eine kleine Umbaumaßnahme an dem Fühler mit dem Schwimmer sorgt nun dafür, das ich sowohl akustisch als auch per Push Benachrichtigung darüber informiert werde. Wenn der Füllvorgang dann von mir eingeleitet wurde, ist es auch schon vorgefallen, das ich einfach vergessen habe, das Wasser wieder auszudrehen. Das ist sehr ärgerlich. Der zweite Sensor sorgt nun mit entsetzlichen Gefiepe dafür, dass ich daran erinnert werde, den Wasserhahn wieder zuzudrehen. Beide Sensoren wurden von mir an einem Stab angebracht, der senkrecht im Fass steht. Die Sensoren funktionieren für meine Zwecke gut, es ist nicht super relevant wenn einer mal eine Falschmeldung macht. Akustisch sind beide Signale getrennt und man kann entscheiden welcher Sensor welches Signal bekommt Nun zu den Nachteilen: Ich hätte mir gewünscht das man den Alarm per App auch für einige Zeit stumm schalten kann, denn gerade in der Nacht stehe ich nicht auf um Wasser nachzufüllen. Das Gepiepe ist wirklich sehr laut ich habe schon Klebeband über den Lautsprecher gepappt, damit die Nachbarn nicht denken bei uns wird eingebrochen. Ich hätte mir gewünscht das man die Sensoren ("links" und "rechts") noch umbenennen kann (bei mir in "voll" und "leer"). Der Feuchtigkeitssensor (bei mir der "VOLL" Sensor) reagiert für meine Bedürfnisse zu sensibel, bei Regenässe piept er auch, obwohl meine Fass nicht voll ist. In diesem Fall habe ich mir angewöhnt ihn nur anzustecken, wenn ich das Fass gerade fülle. Das Gehäuse guckt bei mir aus dem IBC Tank oben raus und ist somit auch dem Wetter ausgesetzt. bisher gab es,bei mir keine Probleme. Im Einsatz ist die Konstruktion seit einem Jahr.
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