







💧 Stay ahead of leaks with smart, wireless water level monitoring!
The YoLink LoRa Smart Water Level Monitor Sensor is a wireless, battery-operated float switch alarm designed for versatile water level detection in sump pumps, AC condensers, toilets, tanks, and more. Featuring ultra-long-range LoRa connectivity (up to 1,320 feet), a powerful 105dB built-in siren, and easy DIY installation, it integrates seamlessly with smart home platforms and sends real-time alerts via app, SMS, or email to prevent water damage. Requires the YoLink Hub for operation.






| ASIN | B0C3KXCY8B |
| Amazon Bestseller | #1,022,366 in DIY, Tools & Garden ( See Top 100 in DIY, Tools & Garden ) #2,340 in Household Sensors & Alarms |
| Are Batteries Included | Yes |
| Battery Description | AA type |
| Battery Type | Alkaline |
| Control Method | App |
| Customer Reviews | 4.2 4.2 out of 5 stars (159) |
| Date First Available | June 10, 2023 |
| Included Components | Detector |
| Item Weight | 240 g |
| Manufacturer | YOSMART |
| Material | plastic |
| Maximum Range | 1320 Feet |
| Model Number | YS7904 |
| Mounting Type | Wall Mount |
| Name List for Name Plates | No Hub |
| Noise Level | 105 Decibels |
| Number of Batteries | 2 AAA batteries required. (included) |
| Product Dimensions | 6.2 x 6.2 x 2.03 cm; 240 g |
| Sensor Technology | Sound Sensor |
| UPC | 810121540848 810121540565 |
D**E
Wow! Love this brand. I already have some door sensors to prevent the kids sneaking out at night, and now added a high level sump pump sensor. Works like a charm, texts and alerts on my phone and the unit itself beeps in the basement. I would definitely recommend this product for many different applications.
K**T
Well made and easily installed. Works effectively and support service professional if required.
M**M
I bought this to monitor the water level in my Christmas tree stand, and it’s been perfect for that. It alerts me when the water gets low so I can refill it before the tree dries out—no more needles all over the floor. Setup was easy, alerts are reliable, and the LoRa range works great even with the tree not near my router. For a non-traditional use case, it’s worked flawlessly. Simple solution that actually does what it’s supposed to do.
B**R
This has been a great product for us. As we don’t have an auto filler for the pool, I was able to use this to warn if the pool level was low so we can fill the pool when needed. Using Alexa, we automated a routine to automatically turn the hose on when the water level is low. Also, I put the unit inside an electrical enclosure and drilled out a small hole for the level sensor. This keeps it protected from the elements.
K**.
Parfait pour avoir la tête tranquille et être averti en cas de panne de la pompe ! Je n'ai pas eu de problème avec ma pompe depuis l'achat, mais lors de mes tests les avertissements fonctionnaient bien!
Trustpilot
2 weeks ago
4 days ago