... feature. Technical featureControl by microcomputer,frequency control of motor speed,touching panel,can be operated by programming,programmdble operation ... RCF automatic computing and setting,adjustable Rise-And-fail speed from grade0 to 9.Ensure safety inlusing the instrucment ... and used by customers Technical DataModel CNWT-20M Max Speed 20000r/minMax RCF 27800×gMax Capacity 250ml×4Speed Accuracy ...