YoLinkWater Leak Sensor 3, with Built-in Siren Up to 105dB, Compatible with Alexa and IFTTT - YoLink Hub Required

This device is great. You can combine it with your Alexa and you can even use a smart plug to turn off your washing machine. If the drain backs up based on the trigger from this device combined with a smart plug and an Alexa.

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.

I purchased both types of the water leak sensors. I purchased this one which has a probe for my A/C unit. The probe sits down into the A/C over flow tray. while the unit itself is connected to the wall above the tray. I could have used the other type of leak sensor, just my A/C unit, if the drain get plugged up, the over flow tray will fill up to over an inch of water before my A/C unit automatically turn off (A/C emergency cut off switch is attached to the over flow tray). The over flow tray is over three inches deep. This would mean that the other leak sensors would be almost if not all the way submerged in the A/C over flow tray. The reason for this is, I have had my A/C flood my entire house with almost an inch of water in every room, destroying my wood floor. Yes the A/C turn off automatically, I just want to know if any water gets into the over flow tray. This sensor, not just beeps like my old one did, but using the YoLink hub, I get notified via message on my phone that water was detected in the tray. I also have Alexa send a message to several device the same message. Now I can resolve the A/C drain issues before the A/C turns off. If I am not home, I know what the A/C is not on when I do get home. So I do recommend both types of sensors. I use the other ones under each sink and around my washing machine and hot water heater. I want to know if any leak is detected. These sensors are much less expensive than replacing an entire wood floor throughout your home.By the way, using the Yolink hub, the sensors does interact with other devices and Alexa. And if you ever need any help from Yolink C/S, they are top notch. 👍👍

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.