The Abbe Refractometer AR4 is a classic manual refractometer designed for quick and reliable measurement of refractive index and Brix values. It is easy to use and suitable for liquids, viscous samples, films, and solids with a smooth surface. Readings are viewed through an eyepiece, and the built-in digital thermometer shows temperature on an LCD display. The AR4 can also be connected to a circulation thermostat for temperature control. With a durable body and simple handling, it is ideal for basic laboratory testing, quality checks, training, and incoming or outgoing goods inspection. It offers dependable results at a low operating cost.