We sell both handheld and digital refractometers. Our refractometers are all very accurate and easy to use. We have refractometers for the most common uses, but if you need one for a special job please contact us, and we will be helpful to get the one suiting your requirements. - Refractometer specially designed for measurement of the concentration of your emulsions and metalworking fluids 0-15%. Also good for many other purposes. - Refractometer specially designed for metalworking fluids or other industrial fluids where solid content/dry matter must be measured - 0-32%. - Auto refractometer for measurement of antifreeze fluid, windscreen washer fluid and battery acid. All three scales in same instrument. - This refractometer can be used for testing the boiling point of brake fluid (DOT4 & DOT4 PLUS / Super)