OPTi Digital Handheld Refractometers

The Bellingham + Stanley OPTi range of application-specific instruments and custom models cater for a wide range of industrial uses, particularly where expression of the reading needs to be displayed in units relevant to the solution under test or must comply with local regulations.

Bellingham + Stanley designed OPTi digital hand held refractometers are manufactured in the UK as highly reliable premium quality instruments suitable for use in the harshest of environments across a wide application scope.

OPTi refractometers are constructed using the latest manufacturing techniques including stainless steel injection moulding to construct the easy clean prism dish, ultrasonic welding to bond the housings and a rubberized switch membrane to further protect against moisture ingress and excess wear. The OPTi refractometer may be used to control the dissolved solids or blend ratios of numerous products from fresh fruit to industrial chemicals.

Portable and Precise

Portable and simple to operate, the OPTi provides excellent “on-the-spot” concentration analysis with automatic temperature correction. Accurate one-button measurement and a clear display present reliable results, no matter who takes the reading.

Thanks to its compact design and clever marriage of smart software and ergonomic hardware, OPTi refractometers are perfect for taking measurements anywhere.


  • – Quick 2 second read time of sample
  • – Onboard library of over 40 scales
  • – Up to 3 active scales on a single device
  • – High Ambient Light (HAL) detection – warns of too much light entering the sensor
  • – Unique “AG Test Mode” that allows the use of long-life non-sucrose based certified reference materials
  • – Programmable read delay for sample temperature stabilization


  • – Clear digital LCD display
  • – Ergonomic and durable handheld design
  • – IP65 rated
  • – Easy-clean, stainless steel prism dish
  • – Rapid temperature stabilisation
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An OPTi® For All Occasions

The OPTi Digital Handheld Refractometer can be used for measuring fruit ripeness, fruit juices and concentrates, carbonated beverages, alcohol content and grape must, confectionery and jams, sugar and many other food applications. Industrial applications include the measurement of soluble oils, quenchants, glycols, antifreeze, air-conditioning and heat transfer fluids, aviation fuel inhibitors, aeroplane wing de-icing surfactants, starch, textile surfactants and more.

Food and Beverage

Used for testing the ripeness of fresh fruits such as grapes and tomatoes simply by squeezing a small amount of juice directly onto the refractometer prism. OPTi refractometers are used in the manufacturing of jam, marmalade, syrup and other high sugar content products as well as quickly testing for moisture in honey direct at the hive. They are ideal for testing finished juices and other soft drinks.

Scales include: Brix, °Butyro, HFCS, Salinity, Water in Honey, and more.

Beer and Wine

From home-brew beer to the microbrewery and beyond, our refractometers have been helping brewers for years. In the beer world, refractometers are used to measure Wort prior to fermentation as well determining alcohol content. We supply OPTi refractometers to vineyards around the globe so that grape ripeness can be checked before harvest, sugar content assessed and alcohol content measured in the final stages of production.

Scales include: Brix, Wort SG, °Baume, Alcohol Probable, Oechsle, Salinity, and more.


Bellingham + Stanley’s industrial refractometers cover a broad spectrum of applications. A common scale used within the industrial sector is Glycol % – useful for engineers working on air-conditioners, heat exchangers or even pasteurisers. When using the Brix scale, refractometers can be used for fire fighting foam and industrial coolants. In the aviation industry there is a need for determining the concentration of aircraft anti-icing fluids.

Scales include: Brix, RI, Calcium Chloride %, Ethanol %, Ethylene Glycol % and more.


OPTi automotive instruments are able to test coolant fluids (measurable in either °F or °C frost protection) and battery acid, as well as AdBlue® (DEF) concentration – ideal for vehicle service centres, garages, car manufacturers and fleet managers. Keep your vehicles runing smoothly and safely with OPTi.

Scales include: Brix, RI, Sulphuric Acid SG, AdBlue®, and more. AdBlue® is a registered trademark of the VDA Verband der Automobileindustrie e.V

Veterinary and Life Science

Bellingham + Stanley offer a selection of scales for veterinarians and farmers for testing colostrum, blood and urine samples taken from animals. Thanks to needing only a small drop of sample to give a clear and accurate reading, OPTi refractometers are perfect for measuring samples that are often difficult to obtain or, in the case of colostrum, being a valuable commodity.

Scales include: Brix, RI, Colostrum Quality, Urine Specific Gravity, Serum Protein, and more.

Servicing, Calibration and Support

Imbros’ local engineering department can service, repair and calibrate your instrument without expensive shipping costs or wait times.


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