Updated November 2026
Data from the official Flume and YoLink sites.
2026 verdict
One watches the meter and one watches the floor, yet the YoLink Water Leak Sensor 1 is the winner for a point leak.
It is an IP68 puck on LoRa through a YoLink hub, rated up to 5 years on two AAA cells, with a local light, low-battery alerts, a 2-year warranty and Home Assistant. The Flume 2 Smart Water Monitor straps to the water meter, reads whole-home use over Wi-Fi through an indoor bridge, and works with Google Home and Home Assistant, including leaks that never reach the floor. It has no on-device siren or light. Battery life and warranty are not documented for it. Choose the YoLink Water Leak Sensor 1 under a sink or in a crawlspace. Choose the Flume 2 Smart Water Monitor to track usage and hidden flow.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Winner
Works with
News by email
Still comparing? Get what's new by email
New releases and the smart home news worth knowing, in your inbox.
No spam. Unsubscribe in one click.
| Feature | Flume 2 Smart Water Monitor | YoLink Water Leak Sensor 1 | Winner |
|---|---|---|---|
| Rating | 4.0 | 4.6 | YoLink Water Leak Sensor 1 |
| Connectivity | 2.4 GHz WiFi, Other | Other | Flume 2 Smart Water Monitor |
| Integrations | Google Home, Home Assistant | Home Assistant | Flume 2 Smart Water Monitor |
| On Device Alert Light | NO | YES | YoLink Water Leak Sensor 1 |
| Weather Resistance | YES | IP68 | Tie |
| Sensors | Water Leak | Water Leak | Tie |
| Alerts | Water Leak Alerts, Low Battery Alerts | Water Leak Alerts, Low Battery Alerts | Tie |
| On Device Alert Sound | NO | NO | Tie |
What the differences mean
Meter flow versus a wet floor
The Flume 2 Smart Water Monitor reads the existing water meter and reports use to an indoor Wi-Fi bridge, so it can flag flow that never pools on a floor. The YoLink Water Leak Sensor 1 only knows that water touched its electrodes. A silent toilet or a buried irrigation leak is a Flume problem. A puddle under a heater is a YoLink problem. Buying one does not do the other job.
How far the radio goes
The YoLink Water Leak Sensor 1 uses LoRa to a YoLink hub, which the product describes as long range through walls, rated in open air out to a quarter mile. It has no Wi-Fi radio of its own. The Flume 2 Smart Water Monitor uses 2.4 GHz Wi-Fi plus another radio between the meter strap and the indoor bridge. The bridge needs a mains outlet in range of the meter. A detached garage favors the YoLink path. A meter in a sidewalk pit favors Flume.
Alarm, seal and battery paperwork
The YoLink Water Leak Sensor 1 is IP68, has an on-device light but no sound, is rated for 5 years on two AAA cells, documents low-battery alerts, and carries a 2-year warranty. The Flume 2 Smart Water Monitor has weather resistance marked yes, no sound, no light, a proprietary lithium pack, and no documented battery life or warranty. Low-battery alerts are supported. Automations are supported on the YoLink and not documented on the Flume.
Platforms
The Flume 2 Smart Water Monitor supports Google Home and Home Assistant. Alexa, Apple Home, SmartThings and Matter are not supported. The YoLink Water Leak Sensor 1 supports Home Assistant only on that list. Google Home, Alexa, Apple Home, SmartThings and Matter are not supported, despite the way some shopping blurbs group it with voice assistants. Both still need their own bridge or hub.
Which one to buy if
- you need to know about a puddle under a sink or in a crawlspace
The YoLink Water Leak Sensor 1 is the floor sensor, IP68, with a light and a 5-year AAA rating, through a YoLink hub.
- a leak may never touch the floor, like a running toilet
The Flume 2 Smart Water Monitor reads the meter, so it sees flow that a puck will never feel.
- you want Google Home to hear about water use
Google Home is supported on the Flume 2 Smart Water Monitor and not on the YoLink Water Leak Sensor 1. Home Assistant is on both.
- the sensor has to live far from the Wi-Fi router
LoRa to a YoLink hub is how the YoLink Water Leak Sensor 1 stays in range. It does not join Wi-Fi itself.
- + Connectivity: 2.4 GHz WiFi, Other
- + Integrations: Google Home, Home Assistant
- - Rating: 4.0 vs 4.6
- - On Device Alert Light: NO vs YES
Winner
15% OFF
$16.99
$19.99
- + Rating: 4.6
- + On Device Alert Light: YES
- - Connectivity: Other vs 2.4 GHz WiFi, Other
- - Integrations: Home Assistant vs Google Home, Home Assistant
What owners say
These owners are not reviewing the same job, which is why the praise barely overlaps. Flume 2 Smart Water Monitor owners write about leaks a floor puck could never see, such as a toilet flapper running into the bowl, and about installation with no plumber, plus minute-by-minute history they actually open. Their complaints are a proprietary replacement battery and per-fixture guesses that feel less precise than the marketing. There is no siren, so every alert is in the app. YoLink Water Leak Sensor 1 owners write about setup in minutes, alerts by app, email and text with no subscription, and years on two AAA cells, including spots where Wi-Fi sensors drop off. They complain that the puck is silent unless you add a YoLink siren, that a hub is sold separately, and that a single stray drop may not bridge both electrodes.
Frequently Asked Questions
Which is better overall: Flume 2 Smart Water Monitor or YoLink Water Leak Sensor 1?
For a point leak, the YoLink Water Leak Sensor 1. It is an IP68 floor sensor with a light and a 5-year rating. The Flume 2 Smart Water Monitor is the better tool only when you need whole-home meter flow, including leaks that never reach a sensor on the floor.
What is the biggest difference between the Flume 2 Smart Water Monitor and the YoLink Water Leak Sensor 1?
They answer different leaks. Flume straps to the water meter and tracks use over Wi-Fi. YoLink sits where water pools, uses LoRa to its own hub, and does not read a meter. Flume has no siren or light. YoLink has a light and no sound.
Does the YoLink Water Leak Sensor 1 sense temperature like later YoLink leak sensors?
No. Temperature and freeze alerts are not supported on the YoLink Water Leak Sensor 1. The product's own notes say that is unlike the Water Leak Sensor 4. The Flume 2 Smart Water Monitor does not sense temperature either.
Do the Flume 2 Smart Water Monitor and the YoLink Water Leak Sensor 1 work with Google Home?
The Flume 2 Smart Water Monitor supports Google Home and Home Assistant. The YoLink Water Leak Sensor 1 supports Home Assistant and does not support Google Home, Alexa, Apple Home or SmartThings.
Who should buy the Flume 2 Smart Water Monitor?
Buy the Flume 2 Smart Water Monitor to watch whole-home use and leaks inside the plumbing, with no plumber, if your meter is compatible. It will not scream in the room, and battery life is not documented.
Who should buy the YoLink Water Leak Sensor 1?
Buy the YoLink Water Leak Sensor 1 for attics, basements and outbuildings on a YoLink hub, with an IP68 body and a long AAA rating. Add a separate YoLink siren if you need a sound. The puck itself is silent.
Spotted something wrong on this page? Tell us and we will fix it.
Our store on AmazonShop our ideas on AmazonLists of the smart home setups we would put together ourselves, ready to add to your Amazon cart.Shop on AmazonFull 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
- 37 specs compared
- 34 filters
- Water Leak Sensors
Water Leak Sensor 4
- Water Leak Sensors
Tapo T300
- Water Leak Sensors
Water Guard
- Water Leak Sensors
Wi-Fi Water Leak Detector
- Water Leak Sensors
Water Leak Sensor
- Water Leak Sensors
Water and Freeze Sensor
- Water Leak Sensors
Zigbee Water Leak Sensor
- Water Leak Sensors
Flood S Gen4
- Water Leak Sensors
Water Leak Detector 2
- Water Leak Sensors
Water Leak Detector
- Water Leak Sensors
Water Leak Sensor T1
- Water Leak Sensors
Water Leak Detector (Sensor Cable Edition)
- Water Leak Sensors
Flood Sensor (Z-Wave)
- Water Leak Sensors
Flood & Freeze Sensor E20
- Water Leak Sensors
Water Leak Sensor
- Water Leak Sensors
Water Sensor Alarm
- Water Leak Sensors
Smart Water Leakage Sensor
- Water Leak Sensors
Flood Sensor (HomeKit)
- Water Leak Sensors
Water Leak Sensor
- Water Leak Sensors
Flood Gen4
- Cameras
Uno
- Door & Window Sensors
LoRa Smart Outdoor Contact Sensor
- Door & Window Sensors
Solar Outdoor Door Sensor
- Hubs
Hub
- Motion Sensors
Indoor Motion Sensor RT
- Motion Sensors
LoRa 1/4 Mile Motion Sensor
- Plugs
Mini Plug
- Plugs
Smart Outdoor Energy Plug
- Smoke & CO Detectors
Photoelectric Smoke Alarm
- Temperature & Humidity Sensors
Smart Wireless Thermometer Hygrometer
- Water Leak Sensors
Water Leak Sensor 4
- Water Shutoff Valves
FlowSmart All-in-One Water Meter & Shutoff
- Water Shutoff Valves
Valve Controller 2 with EVO Valve Operator
- Water Timers
Smart Sprinkler Timer