Float Pro digital hydrometer

 

Real-time fermentation monitoring without opening your fermenter

Float Pro digital hydrometer
Float Pro digital hydrometer

€ 129,95Add to cart

  • 30-Day money-back guarantee
  • Ships within 3-5 days across Europe
  • Designed & produced in The Netherlands
  • 2-year warranty

Stop guessing, start tracking your fermentation precisely

Don’t rely on occasional hydrometer readings. Every time you open your fermenter you risk contamination and add oxygen to the fermentation tank.

Float Pro digital hydrometer continuously measures your fermentation, without opening your fermenter.

  • Continuous gravity and temperature measurements
  • Automated graph of fermentation curve
  • You won’t miss important fermentation changes
  • You’ll know when fermentation has finished
  • You have a track record of every fermentation

If you’re new to brewing or testing recipes for your professional brewery; Float Pro is the digital hydrometer for you.

Why track fermentation continuously?

Continuous tracking lets you see detailed changes during all the stages of fermentation, giving you full insight and control over your brew.

Understand your fermentation – watch real time density and temperature changes and see exactly what’s happening in each stage.

Optimize recipes – continuous data lets you make adjustments if needed. Compare batches and refine your brews with real data.

Brew with confidence – know exactly when fermentation is done without opening your fermenter.

 

Curious about how continuous fermentation tracking can improve your brew? Read our blog post to learn more.

Float Pro - digital hydrometer and thermometer unboxing

How to start tracking your next batch

Float Pro works straight out of the box. No complicated setup — just connect, drop, and start tracking.

Simple setup: Connect to your Wi-Fi, create or sign in to your My Brewbrain account, and switch to measure.

Drop & track: Place Float Pro in your fermenter and start monitoring instantly.

Cloud access anywhere: View your data on mobile, tablet, or desktop.

Premium quality: Easy to clean when you’re done.

Flexible charging: Wireless or USB-C charging keeps you brewing without downtime.

Ferment your next batch with confidence – Float Pro makes it easy.

Start tracking your brews: order Float Pro now

€ 129,95Add to cart

€ 129,95Add to cart

Features

Track your fermentation activity, temperature and SG and more.

Float Pro is Wi-Fi conneted

Wi-Fi connected. Measure everywhere

Track fermentation and follow trends

Track fermentation activity and temperature

Measures SG (density) and temperature

Follow sugar to alcohol transformation

Pressure rated up to 2 bar

Pressure-rated to 2 bar

QI compliant wireless charging

Charge wireless or USB-C

Multi-color feedback via lid lighting

Multi-color LED for identification and status info

Technical specifications

General

Application Fermentation monitoring of beer, wine, cider, mead etc.
What's in the package  
Float Pro With rechargeable battery, pre-installed
Charger (Wireless) charger and cable not included
Dimensions 183 x Ø41 mm (7.2 x Ø 1.6")
Weight (exluding packaging) 165 g (5.8 oz)
EAN 8 720844 085187

Usage

Temperature range +2 °C to +60 °C (+36 °F to +140 °F)
Pressure range +2 bar or 3 barg (+29 PSI or 43 PSIg)
Charging  
Wireless power QI v1.2 compliant chargers (check our charging pad guide)
USB-C Use 5V chargers, min 1A output
Battery 4 months on full charge
Wi-Fi connectivity  
Standard Wi-Fi 802.11 b/g/n - 2.4 GHz only (recommended Wi-Fi settings)
Security WPA, WPA2 Personal
Encryption WEP, TKIP, AES

Measurements

Measurement logging  
Data sent via Wi-Fi (Bluetooth: in development)
My Brewbrain platform Measurements logged every 15 mins, free account
Local / custom We are exploring options, we value your input
Specific gravity  
Range 0.970 to 1.150 SG (-8 to 34.3 °Br/°P)
Accuracy ±0.006 SG (≈ ±1.5 to ±2.5 °Br/°P )
Resolution 0.001 SG (≈ ±0.25 to ±0.40 °Br/°P )
Measurement units Brix, Plato, Oechsle, Baumé, KMW/Babo
Temperature  
Range 0 to +60 °C (32 to 140 °F)
Accuracy ±0.25 °C (±0.45 °F)
Resolution ±0.0625 °C (±0.45 °F)
Measurement units °F, K

Materials

General  
Food safety All outer materials are food-safe
Recylability All materials are recyclable, please dispose of correctly🖤
Ingress protection Waterproof according to IP67
Housing, lid PET
Sealing ring TPU, with silicone lubricant
Cleaning Conventional brew cleaning agents, FAQ for full list

Why Brewbrain

  • Built by brewers, for brewers
  • Designed and produced in The Netherlands
  • Thousands of brews tracked on our free platform

Reviews from:
BeardyMan Craft Beers (English)
Malzknecht (German)

What fellow brewers say

Frequently asked questions

Can Float Pro digital hydrometer be used for fermenting under pressure

Yes. The Brewbrain Float Pro is designed with a high-quality housing and customized seal. This ensures a watertight housing even when fermenting under pressure, making it suitable for modern brewing setups.

The Float Pro operates reliably during pressure fermentation up to +2 bar, while continuing to measure and transmit fermentation data such as gravity and temperature.

Does Float Pro integrate with Brewfather?

Yes. The Brewbrain Float Pro can connect to Brewfather through the My Brewbrain platform.

The Float Pro automatically sends fermentation data—such as gravity and temperature—to the My Brewbrain platform, which can then share this data directly with Brewfather. This allows you to monitor your fermentation progress inside your Brewfather brewing dashboard.

In addition to Brewfather, the Float Pro also integrates with other brewing platforms, including Grainfather and several third-party brewing tools.

All integrations are available free of charge, so you can connect your Float Pro to your preferred brewing software without any additional subscription fees.

Will Float Pro work in stainless steel fermenters?

Yes, Float Pro can send measurements even when used in a stainless steel fermenter inside a fridge.

How accurate is Float Pro?

The Brewbrain Float Pro measures specific gravity with an accuracy of ±0.006 SG.

While this level of accuracy is suitable for fermentation monitoring, the real strength of the Float Pro is the continuous measurements it takes throughout fermentation. With a traditional hydrometer you take a few manual readings, but the Float Pro automatically records far more measurements over time.

With continuous measurements, a clear fermentation curve is plotted, that allows brewers to see relative changes in gravity, which is useful for:

  • Tracking fermentation progress

  • Determining when fermentation has finished

  • Detecting issues such as yeast not starting or a stalled fermentation

Does Float Pro support different measurement units?

Yes. Float Pro supports the following units:

  • Gravity:
    • SG
    • Plato (°P)
    • Brix (°Brix)
    • Oechsle (°Oe)
    • Baumé (Be°)
    • Klosterneuburger Mostwaage (KMW/Babo)
  • Temperature:
    • Celcius (°C)
    • Fahrenheid (°F)
    • Kelvin (K)

You can set the units in the My Brewbrain Platform.