







💧 Never miss a drop—smart water level alerts that keep you ahead of leaks!
The YoLink LoRa Smart Water Level Monitoring Sensor is a wireless, battery-powered float switch alarm designed for diverse water level detection needs. Featuring an ultra-long 1320-foot LoRa wireless range, a loud 105dB siren, and seamless app notifications (push, SMS, email), it enables proactive water management for sump pumps, toilets, tanks, and more. Easy DIY installation and compatibility with Alexa, IFTTT, and Home Assistant make it a must-have smart home water safety device. Requires YoLink Hub for operation.






| ASIN | B0C3KXCY8B |
| Batteries | 2 AAA batteries required. (included) |
| Batteries Required? | Yes |
| Batteries included? | Yes |
| Battery Cell Type | Alkaline |
| Battery description | Alkaline |
| Best Sellers Rank | 264,901 in DIY & Tools ( See Top 100 in DIY & Tools ) 95 in Water Detectors |
| Control method | App |
| Coverage | 1000 Feet(Open Air) |
| Customer Reviews | 4.2 4.2 out of 5 stars (144) |
| Date First Available | 10 Jun. 2023 |
| Included Components | Detector |
| Item Package Quantity | 1 |
| Item Weight | 240 g |
| Item model number | YS7904 |
| Manufacturer | YOSMART |
| Material | Plastic |
| Maximum range | 1320 Feet |
| Mounting type | pendant mount |
| Noise level | 105 Decibels |
| Number of batteries | 2 AAA batteries required. (included) |
| Part Number | YS7904-UC |
| Product Dimensions | 6.2 x 6.2 x 2.03 cm; 240 g |
| Sensor technology | Contact Sensor |
| Style | Without Hub |
| UPC | 810121540848 810121540565 |
| Usage | Amateur, Inside, Professional |
K**T
Good choice
Well made and easily installed. Works effectively and support service professional if required.
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!
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.
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.
M**Z
Great sensor
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.
Trustpilot
1 month ago
1 week ago