The viscosity facility has been designed for very high accuracy and uniformity in temperature, pressure, and composition implying careful design and advanced instrumentation. The infrastructure is unique due to its particular adaptation to CCS applications, and is qualified for corrosive, toxic, and explosive mixtures. The setup is utilizing a two-capillary design, with a design range between −60 and 150 °C in temperature and up to 800 bar in pressure. Except for in the immediate surroundings of the critical point, the setup is designed for an accuracy of the order of 0.1 % in viscosity and pressure, and 10 mK in temperature. Thermal stability and uniformity are achieved through the use of highly accurate thermostatic baths. In order to get full benefit of the viscosity measurements, it is important to measure density of the same mixtures under identical conditions such that both kinematic and dynamic viscosities are found. Hence, an Anton Paar oscillating tube densimeter is connected to the viscometer, which can be used down to -10 °C.