The MR (manual) series refractometers are precision optical instruments used for measuring concentrations of substances in aqueous solutions. They work using the principle of light refraction through liquids. When passing light through a liquid the refracted angle will be shown on the scale determining the amount of dissolved solids in the liquid.
Very simple to use: simply place one drop of your sample on the prism and read the results on the scale immediately!
They have adjustable focus, easy to read numbers for good resolution and zero adjustment screw for calibration.
These hand held refractometers provide direct readings and can measure concentrations of all kinds of solutions such as: Fruit juices, beverages, wine, jam, honey, milk, salt water, brine, canned foods, cleaning fluids, battery fluids, antifreeze etc.
Each refractometer is calibrated and adjusted to measure at 20° C (68°F). Models with automatic Temperature Compensation (ATC), are available and are suitable for applications where the temperature of the samples vary.