Index Instruments U.S., Inc. is an independent company incorporated in the USA with its own staff to give service to all American customers. The management of Index Instruments U.S., Inc., Index Instruments Ltd. and Optical Activity Ltd. is the same and so, when dealing with Index Instruments U.S., Inc., you are dealing with part of the company that manufactures the range of high quality polarimeters and refractometers for which Optical Activity Ltd. and Index Instruments Ltd. are world famous.


Optical Activity Ltd. has been making polarimeters since 1975 and offers a wealth of experience in this specialized field of scientific instrumentation. The instruments are designed, assembled, calibrated and tested on the Optical Activity premises located in rural Cambridgeshire, England. They are then dispatched to our office in Florida for rechecking before onward dispatch to our American customers. All Optical Activity polarimeters are designed with simplicity of use in the forefront; even our programmable models, once set up, can have no operator controls for routine work, and unskilled personnel can obtain accurate results, freeing qualified technicians or chemists for other work. Training time is minimized and maintenance costs are very low.

Optical Activity polarimeters can be found in laboratories and factories around the world, in places as far apart as Mexico and Japan, Australia and Canada. Optical Activity is a field leader in automatic polarimetry and many companies that are household names, especially in the sugar and pharmaceutical industries, have been using their instruments for many years.

You can select a polarimeter from Optical Activity's wide range of models with confidence; we take pride in the instruments they produce and in maintaining their reputation for both quality and reliability. The Optical Activity Quality Control Laboratory is a UKAS* accredited laboratory for polarimeter calibration and your polarimeter can be supplied with a UKAS calibration certificate if required.

UKAS (The United Kingdom Accreditation Service responsible for providing national accreditation - www.ukas.org.)

Index Instruments U.S., Inc. was set up as a sales, service and repair center for the refractometers, polarimeters and other instruments manufactured in England by Index Instruments Ltd. and Optical Activity Ltd.


Index Instruments Ltd., the UK refractometer manufacturing company, is based on the same site in rural Cambridgeshire, England as Optical Activity Ltd. and takes equal pride in producing instruments of a high quality and reliability.

Index Instruments has been designing and making refractometers since 1982 and are leaders in the field of automated refractometry. The staff have many years of experience in both the design and use of refractometers. Close contact with customers ensures that user requirements are taken into consideration in future product developments.

Index Instruments refractometers are currently in use in measuring widely diverse substances; jams/jellies/candies, crude oil, sugars, edible oils, plastics, beers, adhesives, fruit juices, to mention just some of the products quality controlled by Index refractometers. The instruments are exported worldwide.

Specialized products for the measurement of sugar color analysis and others are also produced by Index Instruments Ltd.


The opening of the Index Instruments U.S., Inc., premises in Central Florida in 1990 ensured that a high level of sales information and after sales service became available to U.S. Index Instruments U.S., Inc. has been established in Florida since 1990. Index Instruments U.S., Inc. was set up as a sales, service and repair center for the refractometers, polarimeters and other instruments manufactured in England by Index Instruments Ltd. and Optical Activity Ltd.