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Model #22601LN0

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Sense Smart Water Sensor

  • Detects the presence of water leak, tracks temperature & humidity
  • Smart water sensor
  • Use with GROHE ONDUS app to monitor leaks
  • View More Details

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Product Overview

The innovative GROHE Sense water detector alerts you the moment unwanted water leaks appear with a pulsating red light and buzzer, in addition to an alert which is sent to your smartphone via the Ondus App. This early warning allows you to take immediate action before a simple leak becomes a flood. The Ondus App also provides daily updates on changes in temperature and humidity to help prevent frost damage and the spread of mold. Perfect in the kitchen, bathroom, laundry room, anywhere a water leak could pose a potential problem. GROHE Sense uses 3 AAA batteries and connects to your home Wi-Fi network.
  • For wireless LAN, battery powered
  • Instant flooding alarm
  • Senses room temperature and humidity
  • Receive updates on temperature and humidity once a day
  • Customize settings via GROHE Ondus App for iOS and Android
  • Status indication via LED light, buzzer and app
  • For placement on a flat non-conductive surface
  • Long life battery: expected lifetime up to 4-year, depending on the use of the water sensor
  • Includes 3 x AAA batteries
  • Wireless LAN 2.4 GHz
  • CE approved

Info & Guides

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Sense Smart Water Sensor
Smart Water Sensor (3-Pack)
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Product Depth (in.)
1.37795 in
Product Height (in.)
3.30709 in
Product Width (in.)
3.30709 in


Alarm Type
Water Leak
Battery Size
No Additional Features
Number of Sensors Included
Pack Size
Power Connection
Power Options
Product Weight (lb.)
.49 lb
Range (ft.)
Remote Access
Remote Access
Requires Hub?
No Hub Required
Smart Home
Smart Home Enabled
Smart Home Protocol
Voice Control Hub Required
No Voice Control
Works With
Proprietary App

Warranty / Certifications

Certifications and Listings
CE Certified
Manufacturer Warranty
2 Years

Questions & Answers

Typical questions asked about products:

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Customer Reviews

  • 4.4
    out of 45 reviews
  • 95% recommend this product
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Showing 1-10 of 45 reviews
We decided to use this in a basement window that seems to leak water whenever it rains and water ...
We decided to use this in a basement window that seems to leak water whenever it rains and water hits the window just right and collects in the tracks. This will help us to figure out how to best prevent the water from damaging the window sill any further than what it has so we can capture when water is entering the house. Setup is fairly straight forward and takes about 5 minutes. It took a couple of minutes before my electronic device to recognize the water sensor and pair. And the only way to tell if the device is pairing is a blinking blue light. This is why I gave this 4 stars. Once paired this device will notify you via the app to tell you if there is water detected. It will also give you daily updates on battery status, room temperature and relative humidity. all in all it's a pretty cool device.
  • Recommended
4 people found this helpful
This Smart Water Sensor from Grohe is a great product. It runs on 3 "AAA" batteries (included). ...
This Smart Water Sensor from Grohe is a great product. It runs on 3 "AAA" batteries (included). Monitoring is done through the Ondus app which I got from the Android Store (free). Installation was easy and straight forward. After install, the sensor monitors temperature and humidity, as well as senses water on whatever surface it is placed on with a set of gold contacts. I set it on the basement floor between 2 condensate pumps and next to the water heater. It connects via WiFi and alerts on my smart phone when there is an issue. I placed it on a plate and added some water, the sensor blinked red and emitted a loud series of beeps, then turned blue. About 5 minutes later my phone alerted. Perfect product for what I need.
  • Recommended
1 person found this helpful
I would highly recommend these water sensor pucks. They are approximately 3" across and use three...
I would highly recommend these water sensor pucks. They are approximately 3" across and use three AAA batteries for power. You can place it anywhere and it will monitor moisture, water, temperature, and humidity. I can't really say how the moisture/flood sensor itself works because I have not had a water emergency. But I have had the sensor inform me/my cell phone the temperature was out of the bounds I had selected and that worked well. With these types of smart home products the real test is how well they connect to your home network and how useful the product app is. This water sensor excels with both. I was able to connect the water sensor to my home network on the first try by following the clear directions supplied with the phone app. The app is simple and clear and shows temp, humidity and any current alarms (see photo). You can set the alarm parameters for temp and humidity. I placed my sensor in the basement at my beach house since the basement is the most likely place to flood. I may be buying more of these, I can see placing these in the laundry and kitchen.
  • Recommended
1 person found this helpful
The Sense Smart Water Sensor came yesterday and took me about 10 minutes to install it. You shoul...
The Sense Smart Water Sensor came yesterday and took me about 10 minutes to install it. You should first download the app and sign up before installing the batteries (included) in the unit because it will only send out the SSID for 5 minutes. It took me longer than five minutes to download and sign up, so I had to take the batteries out and put them back in to start the 5 minutes again. Setting up the unit on the app was easy. It may take a few moments for your phone to find the unit's SSID. I tested it out with in my wet kitchen sink and it detected moisture right away. It sounded an alarm and sent a notification to my phone and an email. I'm leaving it under my kitchen sink to detect any water leaks.
  • Recommended
2 people found this helpful
Great product but one issue so far
OVerall, I am happy with the product. The installation was easy enough (I have ProPress tools so that helped) and the configuration went smoothly. I have two remote sensors in locations where leaks are more likely to occur. The rest of the area is protected by the main units ability to detect leaks. I do have one issue. I have two HVAC units, both with whole house humidification. When these units are humidifying, they appear as long microleaks to the unit and water is shut off. I had to modify the settings to allow microleaks. I would like to be able to train the unit to ignore these leaks but there does not appear to be a way. :(
    • Recommended
    Piece of Mind
    [This review was collected as part of a promotion.] I set-up the GROHE SENCE leak sensor in my laundry/kitchen area. I encourage buyers to follow the set-up directions to avoid confusion and Wi-Fi connection issues. The leak sensor appears to function as advertised: give notification of liquid touching the sensors and allows users to view 24H averages for both temperature and relative humidity near the device via the GROHE APP. For larger homes, I would encourage the purchase of multiple GROHE SENCE leak sensors.
      • Recommended
      Easy set up, well designed app, nice packaging
      [This review was collected as part of a promotion.] Excellent design and very easy to set up. Tested this in the sink to see how sensitive it is. Worked every time I tested it. The app is quite easy to install on your phone (I have an Android). The app provides warnings for humidity, temperature as well as moisture. Packaging was very nice as well. In short, a very simple device that will help avoid potential damage from water. I'm using mine in our laundry room, placed on the floor next to our washing machine. Highly recommend.
        • Recommended
        just saved my day
        i added sense by the water heater and there was a lesk last nught. Sense alerted me and saved my condo today. Must get item for condo owners.
          • Recommended
          The Sensor did detect water when I tested it on a wet cloth . I got an aler...
          The Sensor did detect water when I tested it on a wet cloth . I got an alert in my email and App on my phone . Unfortunately the audible part (2 short beeps on and off till you clear it ) of the device isn’t loud enough by a long shot . I placed it next to my sump pump which is just under our bedroom and when the alarm was triggered I couldn’t hear it .During the day that wouldn’t be a big deal as I have my phone all the time but when sleeping I probably wouldn’t hear the email alert . I sent email to the company they should make it as loud as a smoke detector. I returned the unit and will be trying another with a louder db level.
          • Verified Purchase
          Initial install was frustrating; paper instructions were useless. Grohe leaves you a 5 minute win...
          Initial install was frustrating; paper instructions were useless. Grohe leaves you a 5 minute window to complete the install (which requires you previously installed the app, and setup an account), taking nearly 2 minutes in before the device wifi signal showed on my iPad. Once completing the initial connect and assigning to the router, data transfers and has to be processed - first few tries the 5 minutes were up before the connection finalized and had to start again. Did get it connected, and tested in location with water, observing both visual/audible alert as well as emails and app notifications. The online pdf manual I found was nearly 200 pages long, in almost as many languages. The table of contents pages did not seem to line up with the actual content, so I had to page through all of it looking for English. Two days later, I had to reboot the router. Exploring the app, could not find any specific way to confirm whether or not device was connected, but the app showed a temp and humidity reading. Eventually tested with water on device, and while the visual/audible alert sounded, never triggered an app warning, app alert or email. Removed batteries for extended time; app still shows a temp and humidity reading, and 100% battery level - no indication at all that the device is not active. Reinstalled batteries, went through the install process again. Used a different device name so as to know the second try was truly connected, and (again after numerous tries) finally connected, even got an email (or app alert?) stating a device had been added. Tried water on the device, and no app alert or email. Looked for web based account to manage device, but never found (many web accounts seem to be more robust than apps). The apps (the PDF referred to one app, which itself then directed me to a second app) were pretty bare bones. After that second install, tried several times over the course of a day to connect and restart, with no luck. Even created a second account, thinking maybe a fresh start would work; nope, complete the process (after numerous tries), but no more alert that device added, and the blue flashing lights kept going. While it seems trustworthy enough for the local visual and audible alerts, having paid for a device that promised wifi connection and alerts on my phone anywhere, but not getting there, I’ve had enough. The Grohe Sense is going back as soon as I can find the time.
          Response from Grohe Customer CareApr 17, 2020
          Hello, thank you for your feedback on this product and we apologize for the experience you have had so far. Please contact us at grohetechcare@lixil.com and we will be able to have a technician contact you to help complete the installation of the product. Grohe-AmericanStandard
            Showing 1-10 of 45 reviews