Contact Careers Investor Relations Watermark Home Products Parameters Applications Rentals Support About Home > Parameters > Refractive Index / Brix Refractive Index / Brix When light passes from one medium to another, the speed at which the light travels will change depending on the parameters of the materials. This principle can be seen when looking at a straw in a glass or an oarsman on the river, where the straw or oar appears to be bent at the water/air interface. The ratio or change in the speed of light is called refractive index and instruments that measure this are called refractometers. The refractive index of a liquid is related to its concentration and so a refractometer can display the concentration in suitable units, such as °Brix (sucrose), total dissolved solids (TDS), Baume, probable alcohol, sodium chloride, urea and urine specific gravity to name just a few. Refractometers are simple optical instruments used throughout industry for over 150 years and have now developed in to sophisticated digital instruments capable of measuring the % of dissolved solids to 3 decimal places. Handheld Benchtop Case Studies Related Documents Principles of Refractometry Principles of Polarimetry Xylem Analytics UK Xylem Analytics is a major global manufacturer of market leading brands such as YSI, SonTek, Aanderaa, MJK and WTW. The group's success is built on innovation & application expertise with water quality monitoring instrumentation and flow monitoring instrumentation. Customers around the world choose Xylem Analytics because our instruments are designed and manufactured specially for their applications. More about Xylem Analytics UK Explore Home Products Parameters Applications Rentals Support About Get in touch Unit 7 Dunham's Court, Dunham's Lane, Letchworth, SG6 1WB salesuk@xyleminc.com +44 1462 673581 @XylemAnalytics facebook.com/XylemAnalytics Aanderaa, Bellingham + Stanley, ebro, Global Water, HYPACK, MJK, OI Analytical, Royce Technologies, SI Analytics, SonTek, WTW and YSI are trademarks of Xylem Inc. or one of its subsidiaries. Specifications on all products subject to change at any time. Learn more about Xylem and Xylem Analytics. We use cookies and beacons to improve your experience on our site. Read more about this in our Privacy Policy. Transparency in Supply Chains Bellingham + Stanley, ebro, SI Analytics, OI Analytical, WTW (lab & field products) and YSI (life science products) are all Xylem brands operating in the UK from Xylem’s Tunbridge Wells facility. Registered in England and Wales No. 140250. Registered Office: Bellingham & Stanley Ltd., Xylem, Longfield Road, Tunbridge Wells, Kent, TN2 3EY, UK. VAT No. GB 220 3350 25 Aanderaa, Global Water, MJK, Royce Technologies, SonTek, WTW (process products) and YSI (environmental products) are all Xylem brands operating in the UK from Xylem’s Letchworth facility. Registered in England and Wales No. 04838831. Registered Office: Xylem Analytics UK Ltd., Xylem, 7 Dunham's Court, Dunham's Lane, Letchworth Garden City, England, SG6 1WB, UK. VAT No. GB 828 1979 85 Copyright © 2016-2021 Xylem Analytics UK Ltd. / Xylem Inc. All Rights Reserved. | Terms & Conditions | Rental Terms & Conditions STEP 1 OF 2 Privacy By providing personal data to Xylem, you acknowledge that you have read and understand the terms of our Website Privacy Statement Accept Why am I seeing this? English Dansk Magyarország Россия Nederland Français Polski Svenska Español Italiano Deutsch Norsk Suomi Português slovenčina 中文 日本語 Share to Facebook , Number of shares Share to Twitter Share to Print Share to Email More AddThis Share options