Refractometers

Refractometers for measuring light travel through various solutions. Products include sucrose refractometers, battery coolant and glycol refractometers, salinity refractometers and various others. Read More about Refractometers
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18 Products
  1. Extech RF20 Portable Salinity Refractometer
    Extech logo
    Lead Time: 1-2 Weeks
    Extech RF20 Portable Salinity Refractometer
    (no reviews)
    £76.80 £64.00
    • Features automatic temperature compensation from 10 to 30 degrees Celsius
    • Free carrying case and other necessary accessories
    • Simple focus adjustment feature for prism and lens
    64 Reward Points
    Price Match Guarantee
    RF20
  2. TPI 395 Handheld Refractometer
    TPI logo
    Only 1 In Stock
    TPI 395 Handheld Refractometer
    (no reviews)
    £77.99 £64.99
    • Suitable for use in testing propylene glycol, ethylene glycol and battery fluids
    • Cushioned eye piece
    • Smooth focus adjustment
    64 Reward Points
    Price Match Guarantee
    TPI-395
  3. Kern ORA-B Analogue Sugar Brix Refractometer
    Kern logo
    1 Option in Stock
    Kern ORA-B Analogue Sugar Brix Refractometer
    (no reviews)
    £83.28 £69.40
    • Choice of model with different measurement ranges
    • Designed for use in measuring brix (sugar) content
    • Analogue style refractometer with integrated eyepiece
    69 Reward Points
    Price Match Guarantee
    KERN-ORA-SUG
  4. Kern ORA-S Analogue Salinity/Salt Refractometer
    Kern logo
    Kern ORA-S Analogue Salinity/Salt Refractometer
    (no reviews)
    £83.28 £69.40
    • Specifically designed for measuring salt content
    • Analogue refractometer with comfortable eyepiece
    • Choose your model! Different variations with different measurements available
    69 Reward Points
    Price Match Guarantee
    KERN-ORA-SALT
  5. Kern ORA-W Analogue Fruit Alcohol Wine Refractometer
    Kern logo
    Kern ORA-W Analogue Fruit Alcohol Wine Refractometer
    (no reviews)
    £83.28 £69.40
    • Choice of model - different measurement ranges
    • Specifically designed for use with fruit
    • High accuracy, reliable analogue refractometer
    69 Reward Points
    Price Match Guarantee
    KERN-ORA-WINE
  6. Kern ORA-P Analogue Urine Refractometer
    Kern logo
    Kern ORA-P Analogue Urine Refractometer
    (no reviews)
    £83.28 £69.40
    • Choice of with/without automatic temperature compensation
    • Ideal for medical use, particularly in doping testing
    • High accuracy
    69 Reward Points
    Price Match Guarantee
    KERN-ORA-UR
  7. Kern ORA-U Analogue Industrial/Automotive Refractometer
    Kern logo
    1 Option in Stock
    Kern ORA-U Analogue Industrial/Automotive Refractometer
    (no reviews)
    £83.28 £69.40
    • Industrial-grade analogue refractometer for ethylene, propylene, fountain solution, battery fluid and more
    • Choice of model with different functionality
    • Automatic temperature compensation available on some models
    69 Reward Points
    Price Match Guarantee
    KERN-ORA-INDUSTRY
  8. Kern ORA-E Analogue Expert Refractometer w/ Large Measurement Range
    Kern logo
    Kern ORA-E Analogue Expert Refractometer w/ Large Measurement Range
    (no reviews)
    £87.96 £73.30
    • Brix/refractive index versions
    • Extra large measurement ranges
    • High accuracy
    73 Reward Points
    Price Match Guarantee
    KERN-ORA-EXP
  9. Kern ORA-H Analogue Beekeeping/Honey Refractometer
    Kern logo
    Kern ORA-H Analogue Beekeeping/Honey Refractometer
    (no reviews)
    £91.56 £76.30
    • Choice of four models
    • High accuracy analogue refractometer for use with honey
    • Optional automatic temperature compensation
    76 Reward Points
    Price Match Guarantee
    KERN-ORA-HON
  10. Extech RF41 Portable Battery Coolant/Glycol Refractometer
    Extech logo
    3 In Stock
    Extech RF41 Portable Battery Coolant/Glycol Refractometer
    (no reviews)
    £94.80 £79.00
    • Measure coolant concentration
    • Handheld, ergonomic and really easy to use
    • Automatic temperature compensation
    79 Reward Points
    Price Match Guarantee
    RF41
  11. Extech RF12 Portable Brix Refractometer (0 to 18%) with ATC
    Extech logo
    Lead Time: 1-2 Weeks
    Extech RF12 Portable Brix Refractometer (0 to 18%) with ATC
    (no reviews)
    £103.14 £85.95
    • Comes complete with a plastic pipette, screwdriver, calibration fluid and a carry case
    • Provides accurate results in two minutes with just two or three drops of fluid
    • Measure brix concentration in cutting fluids and lubricants
    85 Reward Points
    Price Match Guarantee
    RF12
  12. Extech RF11 Portable Sucrose Brix Refractometer (0 to 10%) with ATC
    Extech logo
    Extech RF11 Portable Sucrose Brix Refractometer (0 to 10%) with ATC
    (no reviews)
    £110.28 £91.90
    • Comes complete with carrying case, pipette and calibration solution
    • Really easy to use with simple focus adjustment on the prism and lens
    • Provides repeatable, accurate measurements on an easy to read scale
    91 Reward Points
    Price Match Guarantee
    RF11
  13. Extech RF15 Portable Sucrose Brix Refractometer (0 to 32%) with ATC
    Extech logo
    Extech RF15 Portable Sucrose Brix Refractometer (0 to 32%) with ATC
    (no reviews)
    £110.28 £91.90
    • Perfect for use in the liquid production industry
    • Easily measures liquids for correct sugar levels
    • Automatic temperature compensation
    91 Reward Points
    Price Match Guarantee
    RF15
  14. Extech RF153 Digital Brix Refractometer
    Extech logo
    Extech RF153 Digital Brix Refractometer
    (no reviews)
    Discontinued
    • Measures % Brix, RI and temperature
    • Displays temperature and %Brix or RI simultaneously
    • Automatic temperature compensation function and zero calibration
    View product for alternatives.
    RF153
  15. Kern ORA 1GG Gemmology/Jewellery Refractometer
    Kern logo
    Lead Time: 1-6 Days
    Kern ORA 1GG Gemmology/Jewellery Refractometer
    (no reviews)
    £231.48 £192.90
    • Designed for use by jewellers
    • Special high refractive index range
    • Easy to use
    192 Reward Points
    Price Match Guarantee
    ORA 1GG
  16. Kern ORM Digital Brix Refractometer – Choice of Range
    Kern logo
    Free UK Delivery
    Kern ORM Digital Brix Refractometer – Choice of Range
    (no reviews)
    £342.48 £285.40
    • Automatic Temperature Compensation (ATC)
    • Large, easy-to-read display with temperature indication
    • Two versions available with different measurement ranges
    285 Reward Points
    Price Match Guarantee
    ORM-X
  17. Kern ORF 2WM Digital Wine Refractometer
    Kern logo
    Lead Time: 1-2 Weeks
    Free UK Delivery
    Kern ORF 2WM Digital Wine Refractometer
    (no reviews)
    £342.48 £285.40
    • Measure sugar content to determine the ripeness of fruit and/or the predicted alcohol yield
    • Automatic temperature compensation function
    • Resilient, compact, easy-to-use design
    285 Reward Points
    Price Match Guarantee
    ORF 2WM
  18. Kern ORA 2GG Analogue Refractometer (Refractive Index 1.35 nD – 1.81 nD)
    Kern logo
    Free UK Delivery
    Kern ORA 2GG Analogue Refractometer (Refractive Index 1.35 nD – 1.81 nD)
    (no reviews)
    £622.44 £518.70
    • Handheld refractometer
    • Handy and robust design
    • Easy, efficient, and sustainable use
    518 Reward Points
    Price Match Guarantee
    ORA 2GG

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About Refractometers

As light bends through a substance, it can be then analysed using a refractometer to determine the exact properties, form, and concentration of that specific substance.

Refractometers are generally used in different forms of research such as gemmology, where measuring the way light bends through a particular gemstone allows the user to identify both the type of gem and the overall purity of the stone. They're also used quite commonly in the marine industry where identifying the way the light moves throughout the water in an aquarium allows testers to identify the salinity and specific gravity of the water, creating the perfect environment for marine life to live comfortably.

Most refractometers include a thermometer as a standard. This is because the refractive index (essentially the way the light is bending through a substance) can be affected by changes in temperature. Thanks to built-in thermometers - often with automatic temperature compensation - it is easy to maintain completely accurate testing.

The devices come in many different forms. While we stock mainly handheld and digital handheld products, there is also laboratory (Abbe) refractometers and inline process refractometers available on the market too.

The Abbe model is bench-mountable and used primarily in the laboratory for incredibly high-precision refraction testing. Inline process models are generally used inside fluid storage containers such as pipes/tanks to constantly monitor the refractive index of liquids passing through that particular area. This is extremely important in the processing industry as it depends entirely on substances being of the right consistency/type to produce multiple things such as paper, food, sugar, and medicines.