YoLinkWater Leak Sensor 2,1/4 Mile World's Longest Range Smart Home Water Leak Sensor,Water Leak Detector with Built-in Siren Up to 105dB,Works with Alexa and IFTTT-YoLink Hub Required,YS7904-UC

I am a huge fan of YoLink products, especially their water sensors. I generally use the Water Sensor 2 which is the one with the 3 foot cord that senses water. I like this style because you can coil it around a water heater, under a washer or dishwasher and be assured that if water touches anywhere on the cord, you will get an alarm. I like that you can buy additional cords and connect them to the sensor so you can have even greater coverage. We had our steam dryer malfunction and was spraying so much water that is was coming out of the drum of the dryer and accumulating on the floor. This happened when we weren't home and the YoLink sensor under the washer alerted us immediately. Because we had the rope style, it alerted more quickly than if we had a point sensor. As we live on the 6th floor of a building, this could have been disastrous but wasn't thanks to our YoLink. Bonus is that you can dry out the cord, put it back and continue to be protected. Some alarms must be thrown away after they've gotten wet - not YoLink!

I purchased the corded water sensor to put under my dishwasher. I found through other reviews you can use a splitter to run another cord in a different direction. I bought the 10 foot cord to go with this. I also used a 6 foot momo audio extension cable. So, I have the extension cable running from the sensor under my kitchen cabinets to get to my dishwasher, the attached the 10 foot cord to that. I have that cord routed in circles and back and forth so I have full coverage under the dishwasher. From the other port in the splitter the 4 foot cord goes around my supply pipes under the kitchen sink. I've tested this by using a wet napkin, anywhere I touch the cable sets off the alarm. The cord seems to be a cloth mesh of some type, but once it's set, you have to dry it, I used a hair dryer and that worked well. One thing to note the picture shows a cord with dual connector. I recieved mono connetors. So any extension or splitter has to be mono. I tested using dual or stereo cable and splitters. They just dont work. It's a mono system. Also, if the siren is enabled on your hub, it sounds like the red alert on the original star trek. That will jolt you out of bed if it goes off at night. Also, Customer Service said it was OK to tack the cord to the floor with electric tape so it won't move, or help it lie flat. They were very helpful.

I do not often write reviews, but the YoLink sensors have been a great addition.Today, 12/3/2023, I was out and about. I received a notification on my phone that a leak was detected in the crawlspace. When I got home and went into the crawlspace I found water in the reported location (I use a naming convention so I know the type and location of the sensors).The leak was a slow drip and the water had pooled. Once the "tail" of the S2 sensor was wet I received the alert. This was a very slow leak and it took some time for the water to build up to touch the "tail". Sometimes it is hard to get the tail to lay perfectly flat. I try to place them in lower areas too. Perhaps if a simple change like rolling the "tail" sensor vs folding them would help, but I really can't complain. They are easy enough to straighten out.I mean how many times to do go into the crawlspace in a give year. A handful? So these play an important role in being proactive.I have looked at other sensors that are cheaper, but I do like the ecosystem and they are very reliable.I have water sensors (S1's and S2's) at key points in the crawlspace to detect this very thing. The battery life is amazing. They have been deployed for over a year and they still report having full batteries.It would have take a long time for us to know that we had a slow leak. That is if we found it in the first place. Like I said before we do not often go into the crawlspace or attic. So for what is worth these add value.I do wish they were priced a bit lower though.In my case I have Yo-Link sensors in the following areas:1) S1 - Crawlspace2) S2 - Crawlspace3) Motion Sensor - Mailbox4) Temp and Humidity - Crawlspace (to help monitor the duhimidifier) and Attic5) Outdoor Power Outlet - This allows for the remote control of the pump in the water feature (schedule control). Last year the water froze and part of the feature broke and had to be replaced. So I got this and am able to change the schedule when it is going to freeze. On the second plug I put an aquarium water heater stick that I can turn on to help keeping the water to freeze. The combination was way cheaper than other options.6) Vibration Sensor (available on the YoLink site) - I am going to buy one of these to put on the dehumidifier in the crawlspace. We had an error that we did not notice for about two weeks. This can trigger an alert in the absence of any vibration. I am going to give this a shot too once I save some money.

Great product, was a little complicated to get setup but the customer service for responding to all questions was remarkable, quick and very detailed response even outside of regular business hours. Thank you!

It detects a leak, great! You clean up the leak, then, when you are most concerned about a repeat leak, set this product aside and let it dry for a few hours! NOT! Others say the cable takes so long to dry (even a hair dryer does not help much) they have a spare cable or have (at increased cost) bought a cable from another companies' water sensor. I took a star off for design of cable.

Purchased and installed these in what I considered potential problem areas before leaving on an extended trip. I was able to monitor them anytime I desired, and that gave (still gives) me great peace of mind.

Had bought other Yolink sensor for around the house but found out it wouldn't fit in the hot water heater leak pan. Bought this so I could run the wire around hot water heater and pipes coming up to hot water heater. Added it to my HA notifications to alert household of leak.

I'm sure their lawyers have scoured over the text used for this product to make sure it's 'technically' not false advertising. For anyone else, you should know that this is NOT a LoRa device, and is in fact completely and utterly incompatible with LoRa and LoRaWAN.It's a completely, 100% proprietary protocol that vendor locks you in to YoLink. In this case, it's particularly dishonest to call it LoRa-based, since the entire point of LoRa is building a mesh network.