Updated October 2026
Data from Amazon and official Shelly and YoLink sites.
2026 verdict
For most buyers in 2026, YoLink Water Leak Sensor 4 is the safer pick over Shelly Flood S Gen4 because of price, rating, and battery life.
Its clearest strengths are price, rating, and battery life, and it still looks stronger on sensors and alerts. The only strong reason to choose Shelly Flood S Gen4 is if warranty, weather resistance, and connectivity are more important to you than the overall verdict. That keeps the verdict firmly in favor of YoLink Water Leak Sensor 4.
vs
Winner
Deals by email
Water Leak Sensor prices change while you decide
We follow prices across the catalog and email you the best deals we find.
No spam. Unsubscribe in one click.
| Feature | Shelly Flood S Gen4 | YoLink Water Leak Sensor 4 | Winner |
|---|---|---|---|
| Price | $27.99 | $17.09 | YoLink Water Leak Sensor 4 |
| Rating | 4.6 | 4.7 | YoLink Water Leak Sensor 4 |
| Warranty | 3 years | 2 years | Shelly Flood S Gen4 |
| Weather Resistance | IP67 | IP66 | Shelly Flood S Gen4 |
| Battery Life | 2 years | 5 years | YoLink Water Leak Sensor 4 |
| Connectivity | 2.4 GHz WiFi, Bluetooth, Zigbee | Other | Shelly Flood S Gen4 |
| Integrations | Google Home, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Home Assistant | Shelly Flood S Gen4 |
| Sensors | Water Leak | Water Leak, Temperature | YoLink Water Leak Sensor 4 |
| Alerts | Water Leak Alerts, Low Battery Alerts | Water Leak Alerts, Temperature Alerts, Freeze Temperature Alerts, Low Battery Alerts | YoLink Water Leak Sensor 4 |
| On Device Alert Sound | YES | YES | Tie |
| On Device Alert Light | YES | YES | Tie |
$27.99
- + Warranty: 3 years
- + Weather Resistance: IP67
- + Connectivity: 2.4 GHz WiFi, Bluetooth, Zigbee
- - Price: $27.99 vs $17.09
- - Rating: 4.6 vs 4.7
Winner
29% OFF
$17.09
$23.99
- + Price: $17.09
- + Rating: 4.7
- + Battery Life: 5 years
- - Warranty: 2 years vs 3 years
- - Weather Resistance: IP66 vs IP67
Price history compared
Every price change of both, in the same store, so the gap between the two lines is what one costs more than the other.
- Shelly Flood S Gen4
- YoLink Water Leak Sensor 4
Loading price history...
Frequently Asked Questions
Which is better overall: Shelly Flood S Gen4 or YoLink Water Leak Sensor 4?
YoLink Water Leak Sensor 4 has the stronger overall profile in this comparison, especially for price, rating, and battery life.
What is the biggest difference between Shelly Flood S Gen4 and YoLink Water Leak Sensor 4?
Price is one of the clearest differences: Shelly Flood S Gen4 lists $27.99, while YoLink Water Leak Sensor 4 lists $17.09.
Which one looks better on price?
Shelly Flood S Gen4 is listed at $27.99, while YoLink Water Leak Sensor 4 is listed at $17.09. YoLink Water Leak Sensor 4 (better spec).
Who should buy Shelly Flood S Gen4?
Choose Shelly Flood S Gen4 if your priority is warranty and weather resistance and that matters more than price.
Who should buy YoLink Water Leak Sensor 4?
Choose YoLink Water Leak Sensor 4 if your priority is price and rating and that matters more than warranty.
Full comparison table
Compare all 34 Water Leak Sensors side by side
You are looking at two of them. The full table lines up all Water Leak Sensors in the catalog with the same specs, so you can filter by what you need and sort by price or rating.
- 34 Water Leak Sensors
- 36 specs compared
- 33 filters
- YoLink
Water Leak Sensor 4
29% OFF$23.99$17.09 
YoLinkWater Leak Sensor 1
24% OFF$19.99$15.29
TP-LinkTapo T300
$19.99- Shelly
Flood S Gen4
$27.99 
X-SenseWi-Fi Water Leak Detector
25% OFF
$15.99$11.99
AeotecWater Leak Sensor
$39.99
EufyWater and Freeze Sensor
$34.99
EveWater Guard
9% OFF$109.95$99.95
GoveeWater Leak Detector 2
14% OFF$69.99$59.99
SwitchBotWater Leak Detector
$16.99
AqaraWater Leak Sensor T1
€24.99
SwitchBotWater Leak Detector (Sensor Cable Edition)
$19.99
FibaroFlood Sensor (Z-Wave)
Last priceOct 7, 2026$61.32
Unavailable
SonoffZigbee Water Leak Sensor
10% OFF$24.99$22.48
AqaraWater Leak Sensor
$18.99
GoveeWater Sensor Alarm
$15.99
ShellyFlood Gen4
$39.99
EufyFlood & Freeze Sensor E20
$39.99
HeimanSmart Water Leakage Sensor
15% OFF$19.99$16.99
FibaroFlood Sensor (HomeKit)
Last priceJan 1, 2026$43.28
Unavailable
CamerasShellyCamera
DisplaysShellyWall Display X1i
€188.90
DisplaysShellyWall Display XL
4.1(65)$349.99
DisplaysShellyWall Display
4.4(434)€127.99
Door & Window SensorsShellyBLU Door/Window Outdoor ZB
Door & Window SensorsShellyBLU Door/Window ZB
4.5(41)$22.99
Energy MonitorsShelly3EM-63W Gen3
4.5(150)$114.99
Energy MonitorsShellyEM Gen3
4.6(270)$69.99
Energy MonitorsShellyEM Gen4
3% OFF€67.00€65.12
Energy MonitorsShellyEM Mini Gen4
4.5(138)$24.99
Energy MonitorsShellyPro 3EM 3CT63
4.4(349)$150.99
Energy MonitorsShellyPro 3EM-400
4.3(21)$329.99
Energy MonitorsShellyPro 3EM v2
4.5(79)$154.99
Energy MonitorsShellyPro EM-50
4.6(952)$119.99
Gas DetectorsShellyGAS (CNG)
4.2(45)€66.00
Gas DetectorsShellyGAS (LPG)
LED BulbsShellyMulticolor Bulb E27 Gen3
4.2(35)€9.90
Motion SensorsShellyBLU Motion ZB
4.5(47)$26.99
Motion SensorsShellyBlu Motion
4.0(1,038)Last priceMay 1, 2026$25.99
Unavailable
PlugsShellyPlug M Gen3
4.5(791)€12.90
CamerasYoLinkUno
4.2(135)$69.99
Door & Window SensorsYoLinkLoRa Smart Outdoor Contact Sensor
4.5(1,008)$24.99
Door & Window SensorsYoLinkSolar Outdoor Door Sensor
4.5(1,008)$31.99
HubsYoLinkHub
4.5(1,423)21% OFF$29.99$23.59
Motion SensorsYoLinkIndoor Motion Sensor RT
4.5(2,008)$27.99
Motion SensorsYoLinkLoRa 1/4 Mile Motion Sensor
4.5(2,008)$23.99
PlugsYoLinkMini Plug
4.6(703)$19.99
PlugsYoLinkSmart Outdoor Energy Plug
4.6(703)15% OFF$32.98$27.99
Smoke & CO DetectorsYoLinkPhotoelectric Smoke Alarm
5.0(13)$49.99
Temperature & Humidity SensorsYoLinkSmart Wireless Thermometer Hygrometer
4.7(898)$18.99- Water Leak SensorsYoLink
Water Leak Sensor 1
4.6(6,915)24% OFF$19.99$15.29 - Water Leak SensorsYoLink
Water Leak Sensor 4
4.7(1,715)29% OFF$23.99$17.09 
Water Shutoff ValvesYoLinkFlowSmart All-in-One Water Meter & Shutoff
$269.99
Water Shutoff ValvesYoLinkValve Controller 2 with EVO Valve Operator
4.5(186)$239.00
Water TimersYoLinkSmart Sprinkler Timer
4.6(31)8% OFF$59.99$54.99