Viscosity of an oil is defined as its resistance to flow and Viscometer measures the flow. Monitoring viscosity is one of the most important components of any oil analysis program. Minute changes in viscosity at operating temperatures can be magnified to the extent that an oil is no longer able to provide adequate lubrication and efficiency in preventing friction between moving parts. - It adopts micro-controller control technology, program control, automatic washing. It needs less solvent oil and it is convenient, efficient. It can be widely used in the enterprises producing and using petroleum products, colleges and universities, and scientific research institutes and so on, where capillary viscometer are used. High degree automation.