Refractometer – Home

Refractometer

Refractometer

Inline refractometer

PR-1000 & PR-111
Inline process refractometers provide continuous control of the concentration of dissolved solids or soluble liquids.
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Abbe refractometer

Model AR-001
Designed to provide a Refractive Index measurement (nD) and Brix measurement for transparent to solid matter.
View Abbe Products

Digital refractometers

Palm Abbe handhelds
Most accurate, fast, convenient, and easy to use. Simply place a drop or two of fluid in the well and press a button.
View Digital Products

Handheld Refractometers

Hand Refractometers
Different scales to measure dissolved solids in solution. Categorized according to the type of measurement scale required.
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Hand Refractometers

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  • Handheld Dot3 Brakefluid Refractometer
    Handheld Dot3 Brakefluid Refractometer

    $350
    Dot3 Brakefluid refractometer Precision optical testing instrument for measuring the boiling point and water content of DOT3 and DOT4 brake fluids....

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  • Handheld Refractometer DOT4 Brake Fluid
    Handheld Refractometer DOT4 Brake Fluid

    $350.00
    DOT4 brakefluid refractometer Precision optical testing instrument for measuring the boiling point and water content of DOT3 and DOT4 brake fluids....

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  • Handheld Refractometer – ATC 0-50% Brix
    Handheld Refractometer – ATC 0-50% Brix

    $110.00
    Brix scale hand refractometer developed for sugar-related liquids such as fruit juices, honey, soft drinks, and wines. monitor and control the sugar concentrations of products in the food and beverage industry....

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Refurbished Refractometers

Inline Refractometers

replacement Parts

Test Meters

About Refractometers

A Refractometer works because light travels at different velocities in different mediums, the light beam is bent at the interface between two adjoining materials. This is called “refraction”. There is an angle of light propagation at which refraction no longer occurs, the light beam instead being reflected back into the original material. This is called the critical angle. Critical angle is the result of light interfacing at two mediums. The PR-111 Inline Process Refractometers measure this critical angle, thereby inferring the refractive index of the second material. Different materials have different refractive indices (RI’s), as do different concentrations. Critical angle is dependent upon these RI’s.

It is equally important to note that the critical angle and refractive index are both closely related to the temperature of the liquid. The refractive index of a liquid at 20°C will be different from the refractive index of the same liquid, at the same concentration, when the liquid is heated to 90°C. Accurate temperatures for the process to be measured are therefore critical to an accurate measurement.

Inside the refractometer's probe is the optical block. The optical block contains the key components of the PR-111 Inline Process Refractometers. The key refractometer equipment components include the LED, prism, thermistat, and silicon detectors.
During a measurement, the refractometer's LED shines through a sapphire prism. At the interface of the liquid and prism, some of the light is reflected back into the refractometer's probe, and some is refracted out into the liquid. The light that is reflected at the interface with the liquid meets the refractometer's two silicon detectors. These detectors are the reference cell and the measurement cell for the refractometer equipment.
A third cell is also applied for “backscattered” light that is reflected back into the probe from suspended particles in the liquid being measured. It is the abilities of the PR-111 Inline Process Refractometers to compensate for this “backscattered” light that give these refractometers the ability to monitor many liquids that would defeat other refractometers.

What are your Requirements?

If your manufacturing or testing procedures call for the measurement of a few parts per million, you may need to invest more than you would with the PR-111 Inline Process Refractometer. But if, like the vast majority of companies that use refractometers, your equipment readings need to be accurate and repeatable to within +/- 1% of span, you’re in luck! We specialize in manufacturing equipment that performs consistently and provides accurate results within the ranges you specify. Not more, not less.

Please visit the Contact Us section of this site, and tell us your tolerances and requirements. We’ll customize a cost efficient and effective PR-111 Inline Process Refractometer system that will provide a solution for your specific needs. Get the right equipment system for your job, and literally save thousands.