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๐ง Stay dry, stay smartโnever miss a drop with YoLinkโs wireless water watchdog!
The YoLink LoRa Smart Water Level Monitoring Sensor is a wireless, battery-powered float switch alarm with a powerful 105dB siren. Utilizing LoRa technology, it offers an exceptional 1320-foot range, enabling placement in hard-to-reach areas without WiFi. Compatible with YoLink Hub and smart home platforms, it provides real-time alerts via app, SMS, email, and siren for multiple water monitoring applications including sump pumps, toilets, tanks, and AC condensate overflow. Easy DIY installation and robust notifications help prevent water damage and costly repairs.







| ASIN | B0C3KXCY8B |
| Audible Noise | 105 db |
| Battery Description | AA |
| Best Sellers Rank | #13,805 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Water Detectors & Alarms |
| Brand | YoLink |
| Built-In Media | Detector |
| Color | Water Leak Sensor 2 |
| Compatible Devices | Android Phone, iPhone |
| Control Method | App |
| Customer Reviews | 4.5 out of 5 stars 933 Reviews |
| Item Dimensions L x W x H | 2.44"L x 2.44"W x 0.8"H |
| Item Type Name | Water Level Sensor |
| Manufacturer | YOSMART |
| Manufacturer Warranty Description | 2 Years |
| Maximum Range | 1320 feet |
| Mfr Part Number | YS7904-UC |
| Model Number | YS7904 |
| Mounting Type | Wall Mount |
| Number of Batteries | 2 AAA batteries required. (included) |
| Power Source | Battery Powered |
| Product Dimensions | 2.44"L x 2.44"W x 0.8"H |
| Sensor Technology | Sound Sensor |
| UPC | 810121540848 810121540565 |
| Unit Count | 1 Count |
D**E
Water Level Sensor is an elegant method for monitoring my sump pumps
I've been a little paranoid about my sump pump recently. I have three pumps in my sump well, a primary pump with its built-in vertical float sensor, a secondary backup pump with a vertical float sensor positioned so that it will not activate unless the primary pump stops working, and a 12-volt pump that runs off a 100 amp-hour AGM battery kept charged using a battery tender. This 12-volt sump pump is my pump of last resort in case of a power outage, and its float will not activate unless the sump water level gets above both the primary and secondary pumps. With this setup, it's not easy to tell when my primary sump pump stops working. This YoLInk Water Leak Sensor 3 solves this problem. The sensor comes with a water sensor probe, which I did not use. For sump wells, they suggest that you use a float switch instead of the included probe since the probe terminals could become covered with mineral deposits and reduce their water detection sensitivity. I ordered the 'Level Sense 15 Feet Water Level Float Switch with Mounting Bracket' from Amazon and it works perfectly for this sump well application. I just had to wire in a standard 3.5mm male plug to the end of the float switch wires to be able to plug into the YoLInk Water Leak Sensor. The YoLink Water Leak Sensor requires the use of an inexpensive central hub (I bought the YoLInk SpeakerHub). It communicates with the hub by use of a long-range radio that has up to a 1/4 mile range and uses very little power. The two standard AA batteries in the Water Leak Sensor should last for one to two years. Setup was quick and easy. You just install the YoLink App onto your cell phone, plug in the hub anywhere in your house, and connect it to your home WiFi. Then you can easily add the Water Leak Sensor to your system by scanning the QR code on the sensor. The YoLink ecosystem has many different types of sensors, alarm speakers, switches, etc. for constructing very elaborate home automation systems. This Water Leak Sensor is a good introduction to this ecosystem, and I'll certainly be considering other home automation options. I attached the small Water Level Float Switch in my sump well so that it would not activate unless the sump water level rose above the normal maximum level permitted by my primary sump pump (but below the level where my secondary sump pump would activate). Now, if my primary sump pump stops working, I receive both an email alert as well as an app notification on my cell phone letting me know that the primary sump pump has stopped working. You can also set up the app to text you an alert, which I have not yet done since you are limited to 25 free SMS texts per month. Since the YoLInk system is compatible with Alexa, I also have all my Alexa devices announce that my primary sump pump has stopped working (easily done with an Alexa routine). In addition, I have set up my YoLInk system to notify me when the float switch opens back up, since this tells me that my secondary pump has run successfully, giving me peace of mind. The YoLInk Water Level Sensor is an elegant method by which to monitor my sump pumps. Now, no matter where I am, I'll know if my primary pump has failed and needs attention as well as whether my secondary backup pump has successfully run. I'm also impressed with the entire YoLInk ecosystem.
L**S
Easy Set Up and Reliable
Easy set up and stays online unlike my previous Flo sensors. The leak detection is VERY sensitive. It detected a small amount of rain that was coming in by the water heater vent, wasnโt causing a problem but previous sensors didnโt catch. Itโs takes awhile for the sensor cord to dry so it can be reconnected. We just got an extra cord to plug in while itโs drying.
M**G
A different use
I have my well fill my 6000 gallon tank each night for 10 minutes every hour from 10 PM until 6 AM. (don't want to run the well hole dry). I have an electric solenoid valve that controls the tank fill. It's timed with a Yolink outdoor Plug Schedule. The tank has a float that cuts off the well fill valve when the tank is full. That works great. So, as a backup, I put the Sensor 3 Probe in a 45ยบ conduit fitting so any tank condensation wouldn't drip on the sensor. Then mounted the conduit/sensor through a hole near the top of the tank at a location just above where the float turns off the well-fill valve. So, if for some reason, the float hangs up or doesn't work, the sensor will turn off the fill valve. The Yolink Automation settings are settings are: "When" Leak Sensor has Water Leak Alert, "Then" Turn off Tank Fill Plug/Valve. Alarm Strategy: Default. Alert Interval: 1 minute. Delayed Alarm: 2 seonds. So, with those settings, if water in the tank touches the Leak Sensor, the tank fill valve will turn off. And when the Plug/Valve tries to turn the fill water valve back on again and the sensor is still wet, the valve will turn off in less than one minute (the minimum time available for Alert Interval). And, it mounts from the outside of the tank so i don't have to try to get my arm inside the tank access hole cover to do anything. I guess this could be used instead of a float but I like the redundancy of the float and Leak Detector.
D**K
Unique Sensor That Works Excellent
This sensor, that can work by itself or also works along with the YoLink suite of sensors is unique in that it uses a cloth like braided material surrounding a long sensor element that when the second it gets wet sounds an audible alarm and if you have it configured with their app it will send you text and / or email alerts every 5 minutes or so. You can place it around the bottom of a water heater or sink cabinet or A/C pan to cover a larger area so a leak can be detected as early as possible. If you need to cover a larger area you can link more sensor cables together, although I have not tried this or have not seen where you buy extra lengths of sensor cable. Of course, I did test the sensor and it reacts to even a drop of water and once the sensor cable gets wet is will alarm for quite a while even if you have tried to dry it with a towel. So I thought since this was just a test that I would just unplug the sensor cable and wait for it to dry out,,,, at which point, it started sending me texts every five minutes that the sensor cable was unplugged. Now while annoying, I thought that was pretty genius on the designers part since you would really like to know if the sensor had become unplugged (Think, for example, if you had moved some items underneath a sink and it pulled it out), well the sensor would no longer be viable but you wouldn't know until the water was running across the floor. Not with this little device as it will send you a notification. I have only had the system in place for two months (they also have other sensors available) and the battery levels are all still indicating full so I have not seen how well that feature works as it is supposed to track the battery level of the sensors. ( not sure if it sends an alert about low battery level) All in all, this is a slick set of sensors and while the app is a little bit clunky to get everything named and organized, once it is setup it is transparent. I hope this company can stay around to help support their product and possibly add other sensors to their repertoire.
D**E
Works in a toilet tank to let me know the tank didn't fill up.
I'm totally blind. I got this sensor mainly to play with initially. The sensor is square in shape. It has a wire that plugs into it 3.5MM and the wire at the other end has 2 round contacts that stick out about 1/4 of an inch to detect water. The Battery compartment is on the back of the sensor with a screw mount whole. The end of the wire that has the two contact probes also has a screw whole too. Their is a button on the front of the sensor for allowing you to put it in set mode and to cause it to pick up settings afer you have made them. However you could just wait and the settings would be picked up the next time it checks for updates and the like. Their is also a sticky mount that you could stick to something to hold the sensor itself. The wire just guessing is about 2 to 3 feet long. I didn't check the length of it. I got the sensor online in the YoLink App. For those that are blind, you'll need to go to the 3rd unlabeled button if you already have sensors online to add this one. At least that is true for Android. In the App, you can go into the configuration for the sensor to either have it alert you when water found or not detected. You can also turn off the beep as well. You can also set the amount of time if the problem exist to be reminded about the problem. That a blind person will ahve trouble setting being it is a slider bar and not a combo box, edit box or flick control. So in my case! Like I said, I initially got this to play with. I got around to putting it in a spot that I can get some use out of it. I put the wire probe in the toilet tank and using the sticky hook mounted it on the side of the tank. Why I did this is twice within the last 6 months! I had the toilet tank handle get stuck down and the water ran for a few hours before I noticed it. So put this sensor wire in the toilet, went into the app and set the sensor to alert me when no water detected and turned off the beep. After all, I don't want it beeping each and every time someone flushes the toilet. Set the alert to remind me after two minuts if the tank hasn't filled back up. The amount of time you set is up to you! If you have a few people in your house! Depending on how fast your toilet takes to fill! You may want to increase the reminder time. I did have a case of the sensor alerting me about the tank being empty but it wasn't. But I just have the probes in the water. So I don't know if it was the fact that some water went into the air and the probes weren't touching the water or not. But that toilet hadn't been flushed in over 24 hours. Probably was more like 30 hours. As far as I could tell they whir touching the water. when I checked out the probe. Unhooked the probe wire from the sensor checked the batteries, took the probe and dried it off and put everything back like I had it. I'll have to see if it happens again. If so, then this may not meet my needs and I'll have to down grade the number of stars I gave it. I just did this in the last 3 days before creating this review.
B**N
So good, just do it
The rope is very sensitive and reusable. The range will be reduced by walls and other obstructions. A couple of my sensors are at their range limit at 400 feet through building walls and nestled beside equipment. Overall a well built product and great value. I now have 11 installed in my apartments and already one has help me respond quickly and avoid expensive damage repair.
J**.
Consider the cable extension for a washing machine
Installed this around/under our washing machine. It was a bit difficult to hang the sensor and then string the cable in the tight space around the washer without moving it. The cable was long enough to run around the back of the washer where the water hoses are attached. It might be a good idea to get the add-on cable so we could extend it to the front of the washer as well. Overall, I'm happy with the YoLink system: easy to set up, attractive, effective, and reasonably priced.
M**Y
Very sensitive leak detection with no false positives
These sensors are a must have! They have quickly detected small leaks on two occasions before they got bad. We have had them for over three years and no false positives. So when they let you know there is a leak they mean it!
S**S
Free Monitoring App for Water Sensor
I purchased the hub and 4 sensors-great investment! There is no monitoring charge. The sensors run through the hub/base. I used water sensors for my sum pumps, floor drain and on floor to detect any water. Everything has been tested and works well. If any water is detected, the hub/base will beep, sensor will beep and my phone will notify me. This is excellent for peace of mind and also no monthly fees!
ุง**ู
Bad impression
Useless,
Y**V
Very much recommended!
This is only one of the line of YoLink products that we purchased and all of them are very reliable, easy to operate and recommended! This one I'm using as alert for sump pump. Hi availability, long range coverage and reliability. Various scenarios can be programmed and alarms will be received. Shareable monitoring.
P**A
No se puede configurar.
No se puede configurar por tanto no se puede vincular con la app
S**N
YoLink Water Level Monitoring Sensor is missing.
This review is for YoLink LoRa Water Level Monitoring Sensor Starter KIT. Water Level Monitoring Sensor with float switch is missing. Only hub received.
Trustpilot
4 days ago
3 days ago