PLAATO Airlock V3 - Wireless Hydrometer and Airlock

  • Front view or PLAATO Airlock with 3 LEDs one
Front view or PLAATO Airlock with 3 LEDs one PLAATO Airlock box PLAATO Airlock on with stopper on top of plastic carboy Screen image of the PLAATO app. Close up of bubbles moving through PLAATO Airlock Waterproof PLAATO Airlock dripping with liquid while powered on Front view of PLAATO Airlock on while in a stopper Image of PLAATO Airlock with dimensions Parts view of PLAATO Airlock at an angle Parts view of PLAATO Airlock Three PLAATO Airlock in a row first one is on

PLAATO Airlock V3 - Wireless Hydrometer and Airlock

SKU 43378



Product Details

Gravity measurements without touching the beer!

PLAATO Airlock is a brand-new way of analyzing your ongoing fermentation. This wireless hydrometer and airlock connects to your local WiFi and sends information about your fermentation straight to your phone. You can track specific gravity, fermentation activity, alcohol percentage, and ambient temperature. And you can do so 100% non-invasively, no contact with the wort needed! By knowing the rate of CO2-release, PLAATO Airlock can estimate the Specific gravity and alcohol content of the batch. Best of all you can use it on all types of fermentation; beer, wine, cider, mead, and hard seltzers!

Monitor your batch from anywhere with the PLAATO App!
With the PLAATO App you are able to monitor the fermentation of your batch from anywhere in the world. This gives you time for other things and peace of mind knowing everything is going as it should with your batch. The same app is used to monitor both PLAATO Airlocks and PLAATO Kegs. Track your fermentation and kegerator stock level all in one place.


Real-time and historical data tracking.
During the fermentation, you have access to the essential parameters in real-time, giving you a unique insight into how different strains of yeast work, how temperature affects the rate of fermentation, and much more. 

Fermentation management.
Keep track of all your fermentations in one place. Each airlock has its own dashboard, letting you type in batch-specific data. There is no limit to how many fermentations you can track simultaneously or to how many people can access the data.

Know when your beer is finished.
When the BPM (Bubbles per Minute) reaches zero, you can be absolutely sure that the beer is finished fermenting - the yeast has fully consumed the sugars - and you can with peace in mind continue with dry-hopping or cold-crashing.

Integratable to your favorite brewing software.
Get everything in the same place - and track your fermentation directly from Brewfather or other brewing platforms.

The science behind the PLAATO Airlock.
Understanding the delicate and yet versatile processes behind brewing is key to unlock its amazing potential, and produce great products with high repeatability, quality, and integrity. The release of CO2 is directly proportional to the chemical reaction rate - ie. how fast the yeast works. 

  • By knowing the rate of CO2-release, we also know how fast alcohol is produced.
  • If we know the total volume of CO2 released, we also know the total amount of ethanol produced and gravity.

PLAATO Airlock measures both the rate and the total amount of CO2 generated, and is, therefore, able to measure and estimate:

  • Fermentation activity
  • Specific Gravity

We know what all you hop heads are thinking, but can I dry hop!?!
YES! No worries, you can open your fermenter and dry hop as normal. The small amount of CO2 that escapes when the lid is taken off only affects the measurements marginally.

Note: Compatible with rubber stoppers. NOT recommended for use with small or medium universal stoppers.

Additional Information

Support Documents - Instructions Click here for instructions


Great for tracking wine fermentation!

Track multiple batches with additional PLAATO Airlocks!


  • Measures Fermentation Activity
  • Temperature Sensor
  • Specific Gravity Calculation 
  • Alcohol Content Calculation 
  • 100% Non-Invasive

V3 Updates:

  • Redesigned bubbler. The bubbler is slightly smaller than the previous versions, which allows it to expand in contact with water and remain functional for long fermentations.
  • Redesigned lid. The lid is flexible, which makes room for the expanding bubbler. It is optimized for extra-long fermentations.

App Features
The free PLAATO app lets you have all your PLAATO Kegs and PLAATO Airlocks in the same place. Each airlock has its own dashboard, letting you type in batch-specific data, including:

  • OG & FG
  • Fermentation Activity in BPM (Bubbles per Minute)
  • Temperature
  • ABV%
  • Chart with fermentation rate, gravity, and temp.
  • Share data with friends

Airlock Specs:

  • Operational Batch Size: 1-13 US Gallons
  • WiFi Connectivity
    Note: WiFi is only compatible with 2.4Ghz networks and is NOT compatible with routers using WPA & WPA2 Enterprise security.
  • Free iOS/Android App
  • Waterproof
  • USB Powered
  • 3m magnetic USB cable - color may vary (included)
  • Works with any USB wall charger (not included)

Check out this quick set up video and see how easy it is to have all your fermentation stats in one place!

Customer Reviews

Based on 7 reviews
Fermenting made easy

I am very happy with how it tracks the fermentation process and helps take the guess work out of when it has completed

Kathleen F.
Happiness is ...

Midwest's web site is easy to use, ordering is a snap, and delivery was FAST.
As a gift for my son who had been considering purchasing one, he was certainly surprised and excited when he unwrapped it. He's happy, I'm happy.

James G.
Great product

This airlock works very well. Only issue is it overestimates the change in SG, giving me falsely low numbers. I’ve been calibrating, but this issue still persists. I’ve only used it 4 times, so hopefully it will improve.
I still think that it’s a helpful device and plan to continue to use it. It can warn you if you have a stuck fermentation or if the ambient temps are out of whack.

Love it - Better than Tilt

Yes the setup isn’t straightforward. But stick with it and you’ll get it. I’ve got a Tilt and PLAATO. PLAATO is much better for me - I want to know when fermentation starts and stops and everything inbetween. I’m never going to rely entirely on an electronic instrument for my SG; I always double check with a hydrometer anyway. However, I like the PLAATO because I have a good idea when fermentation is complete and most importantly it’s not something directly in contact with my beer, like the Tilt is. I’ve had my Tilt leak, and won’t use it again. I have a PLAATO valve as well, which is necessary to compensate for negative pressure from temperature drops (lagering) but they need to work on getting it to seal better with the airlock. Still, the PLAATO is great. I brewed in Kentucky and was checking the fermentation 2 days later in Pennsylvania - nice!

Christopher C.
Good product-tough setup

One clear and concise start-up document included in the box would be helpful. It's a little confusing to click between multiple related, but slightly different articles on the startup site, though I did find it to be a good resource for information after the setup. I was also a little disappointed that the product isn't battery-powered and requires access to an outlet.

Startup critiques aside I found the Plaato v3 was relatively easy to physically set up and connect to the app. I really enjoy the peace of mind that comes from being able to monitor my homebrews remotely and enjoy the streamlined user-friendly interface of the app. Overall I'm pleased with my initial purchase after 2 weeks of use and I just purchased a second to monitor both of my 5-gallon fermenters.