This instrument is a new upgrading product of our rotational viscometer. The adoption of advanced mechanical design technology, manufacturing process, microcomputer control technology guarantees accurate data collection. ultra-bright LCD display with blue back-light guarantees clear data display. With the microcomputer technology, it is easier to set measuring span (rotor number and rotating speed), take digital process of the data measured by sensor, and clearly display rotor number, rotating speed, viscosity value of the tested liquid and its full-scale percentage on the screen.Besides, its automatic switch is set for free selection of proper rotating speed or rotor number.