The refractometer is a measuring device for determining the refractive index of liquid or solid materials. It uses the behaviour of light at the transition between a prism with known properties and the substance to be tested.

Vaisala EN

Vaisala (Finnland) develope and produce In-line process refractometers for industrial process instrumentation and control applications. Vaisala offers a range of products based on refractometer technology meeting the liquid measuring needs of different industries. The inline-concentration-measurment show permantly the concentration in the liquid.

Rudolf Research EN

One of the leading producer from labor equipement. simple and high precision diagnostic device. In the parts of density, refractometer, polarimeter and automatic analysis systems. Rudoph Research is our partner