QC-STMⅢQC-STMⅢ Stormer Viscometer is an instrument applicable to determining the viscosity of the paints and other coating materials that are expressed in KU values. The design of the viscometer is based on the standards ASTM and GB/T 9269-88. It is controlled by microprocessor; the operator can directly read out the KU values of the tested samples from the display panel and do not need to look up the table.