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For your aromatic brew


Coffee goal: a perfectly balanced taste! The digital refractometer SmartRef determines coffee %TDS and calculates the extraction yield with an in-app calculator to help you find the right balance between strength, acidity and sweetness for your coffee.

In combination with the mobile app Lab Meister measurement results can be managed and stored for later reference.

Lab Meister App for SmartRef Digital Refractometer TDS Measurement and Extraction Calculator for Coffee

With a small sample volume of only 0.4 mL, the SmartRef delivers accurate results with automatic temperature compensation (ATC):

  • Total dissolved solids [% TDS]
  • Brix [°Bx]
  • Refractive index current temp. [nD]
  • Temperature [°C], [°F]

The corresponding Lab Meister app offers additional in-app features like:

  • Automatic temperature compensation
  • Coffee extraction calculator
  • Data storage, management, visualization & export
View all specifications
Coffee TDS measurement with SmartRef Digital Refractometer

Coffee TDS measurement with SmartRef Digital Refractometer

The TDS value describes the amount of the total dissolved solids in a sample in percent. Simply put, it describes how much of the coffee bean has been dissolved into your coffee and how concentrated (strong) or watery (weak) the coffee is.

This makes it possible not only to speak subjectively about the strength of the coffee, but also to make the taste measurable.

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Device features

High accuracy

High-precision measurement sensor with an accuracy of 0.2 °Brix

Wide measuring range

Measuring range from 0 to 85 °Brix with automatic temperature compensation


Free mobile app for iOS & Android with smart measurement guidance for precise results

Waterproof design

IP66 dust-tight and protected against powerful water jets

Why SmartRef?

Other refractometers
One device for all units
Continuous measurement mode
Simple cleaing & adjustment
Sample verification for reliable results
Smart data management via mobile app
Over-the-air updates with new features & scales
Automatic in-app calculations
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