The AVSPro automatic sampler operates according to the most precise method, in terms of physical chemistry, used to determine the viscosity of liquids - the capillary method. Using this method, measurements with an accuracy of more than 0.1% can be achieved. Due to the versatility provided by viscometers with optical and TC sensing systems, an extremely wide range of applications is now possible. This includes the measurements of clear liquids and opaque petroleum products. The AVSPro automatic sampler has been developed primarily for viscosity measurements for applications in the polymer and petroleum industries. The main feature of the new automatic unit is the three-axis-positioning sample dosing system. The new X-Y-Z positioning mechanism provides parallel operation of up to eight viscometers in two thermostatic baths at two different measuring temperatures. This method is used in the oil industry in order to determine the viscosity index.