The instrument is designed and made specially for washing the capillary viscometers, which are used for testing petroleum products. It can be used to wash glass capillary viscometer of various types, such as Pinkevitch viscometer, Ubbelohde viscometer, Cannon-Fenske routine viscometer, Cannon-Fenske opaque viscometer. It is high-efficient and time saving especially for the capillary viscometers, which are used for testing heavy oil with high viscosity.  
 
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.