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  • Digital Refractometers & Polarimeters

    For precise measurement of concentration and purity.

    Lean more

  • Handheld Instrumentation

    Portable Refractometers & application specific test kits

    Visit Bellingham + Stanley

  • Certified Reference Materials

    For refractometers and polarimeters.

    Browse all B+S Accessories


For a century Bellingham + Stanley has been one of the world’s leading manufacturers of Refractometers and Polarimeters. Our expertise in optical engineering, electronics and software design has enabled us to create instruments that are used extensively throughout the world’s food, drinks, pharmaceutical, chemical and petroleum industries.

Bellingham + Stanley Product Categories

Industries & Applications

Food & Beverage

Food & Beverage

For over a century, Xylem’s well known global brands have served the food & beverage market. We offer deep application expertise from decades of leading innovation with products, systems and services that address the full cycle of food and beverage production.

Our products are sold into more than 150 countries. Working in true partnership with our customers and end users, we listen, learn and adapt to local environments, delivering solutions with more impact than ever before.

Engineering & Expertise

Rapidly changing technologies and more stringent demands of customers present an ongoing challenge. While Bellingham + Stanley customers experience the capabilities and benefits of current models, R&D staff are actively working on the next generation and keeping abreast of developments in the science and technologies that underpin the instrument business. Instruments are designed from the outset to meet the latest international regulations.



The Production Department adopts a forward-looking philosophy and constantly strives to improve working practices and efficiency. The company is proud of its highly skilled workforce and the factory facilities in Tunbridge Wells is equipped with state-of-the-art machinery. Every instrument is individually inspected and a temperature-controlled test facility is dedicated to instrument calibration to ensure the highest possible accuracy. Best available packing materials ensure that instruments reach their destinations damage-free.

Research & Development

Research & Development

Close co-operation with customers plays a vital role in the development process. A modern, well-equipped laboratory is dedicated to the evaluation of instruments under special conditions and for specific purposes. Customer samples are tested to demonstrate particular instrument performance. Sales staff are then able to offer qualified advice to customers and recommend the most suitable instrument and methodology for their application requirements.

Sales, Service and Calibration

Sales, Service and Calibration

Bellingham + Stanley prides itself in offering a friendly and rapid-response technical advisory service to customers, which extends to sample testing. Technical Bulletins that explain the technologies, applications and technical problems in detail are available to all customers. The comprehensive Company Website provides a principal route to product information and related technology and is updated monthly. 

Within the UK and USA Bellingham + Stanley Ltd. offer preventative maintenance programs either at the customer premises or at our dedicated service centres for customers that require regular servicing of equipment. Calibration standards for refractometers and polarimeters are also available, some traceable to national standards such as NIST or PTB.

About Bellingham + Stanley

About Bellingham + Stanley

Over one hundred years ago Leonard Bellingham and Frank Stanley were pioneers in the development of high quality optical instruments. The company they founded is today one of the world’s leading manufacturers of refractometers and polarimeters. At key stages in its history, Bellingham + Stanley achieved notable advances in the fields of refractometry and polarimetry, producing innovative designs and breakthroughs in technology that are used extensively around the world. This tradition of excellence and innovation continues today at the purpose-built manufacturing facility in Tunbridge Wells, United Kingdom and Sales & Service Centre in Atlanta, USA.

B+S Process Instruments

The drive to make manufacturing processes more efficient has created the demand for in-line instrumentation. This new division of Bellingham + Stanley was established in the late nineties to focus on the particular needs of in-line monitoring and process control.

On-line applications extend from simple interface detection and final concentration recording at the filler of a juice packaging line to the monitoring of sugar blend ratios in confectionery plants. Latest In-tek (in-line) systems provide continuous monitoring and control of engineering fluids in bulk storage tanks and provide the basis of our effluent systems.

Authorized Distribution Partners

Bellingham + Stanley is represented extensively all over the world. Outside the UK over 100 distributors have been appointed in countries in Europe, North America, South America, Africa, Middle East, Far East and Australasia. These companies are carefully selected and trained to provide technical advice on all products and to offer a local servicing facility to customers. This network of outlets is fully supported by experts in Tunbridge Wells and Atlanta, including regular overseas visits. The Company holds training courses for distributors covering the technology, products and servicing of instruments.

For more information and a full product catalog, please visit

Contact Us

If you would like to speak to a specialist or require further information, please contact us via our regional offices below.

Global & USA Regional Offices


Bellingham + Stanley Ltd.
Longfield Road
Tunbridge Wells, Kent TN2 3EY 
United Kingdom
Tel: +44 1892 500400
Fax: +44 1892 543115

United States of America

Bellingham + Stanley
90 Horizon Drive
Suwanee, GA 30024 
Tel: +1 678 804 5730
Fax: +1 678 804 5729
Toll free (USA only): +1 800 678 8573

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European Regional Offices

Germany, Austria & Switzerland

SI Analytics GmbH
Dept. Bellingham + Stanley
Hattenbergstr. 10
55122 Mainz
Tel: +49 (0) 6131 66 5111
Fax: +49 (0) 6131 66 5001

France et DOM-TOM
France Métropolitaine ainsi que les Départements et Territoires d’Outre-Mer

Xylem Analytics France
Dept. Bellingham + Stanley
91, Avenue des Pins d'Alep
Tel: +33 4 66 54 35 60
Fax: +33 4 66 54 35 69


Bellingham + Stanley Ltd.
Registered in England and Wales No. 140250 

Registered Office: Bellingham + Stanley Ltd., c/o Xylem Water Services Ltd., 106 Hawley Lane, Farnborough, Hants, GU14 8JE.