NEW PRODUCT MIXER!!! This new product mixer,it adopts a brulshess DC motor and runs silently.It suits for general mixing and can handle up to 25L of water.the speed range is 0/30-2000rpm,automatically adjusted by microprocessor control technology.The safety circuit design can ensure an auto stop when the motot is blocked or overloaded.It can continuously compare the actual speed of the stirring shaft with the set speed and auto adjust the speed devivation to realize constant speed during the experiment.It keeps constant even the the viscosity of the samples changes. Feature: Digital readout Stepless speed regulation Penetrating stirring paddle Overload protection Short-time overload operation Silent operation Max mixing capacity (H20):25L Motor input power:150W Motor output power:105W Motor principle:brushless DC motor Speed range:0/30-2000rpm Max viscosity:3000mPas Max output power of stirring shaft:105W Allowed continuous operation time:long time continuous operation Max torque of stirring shaft:40Ncm Speed control:stepless Speed setting accuracy:1±rpm Speed measurement deviation when n>300rpm.:1±% Speed measurement deviation when n<300rpm: 3±rpm Stirring paddle fixing:rotating chuck The min diameter of the chuck clamping range:0.5-10mm Inner diameter of hollow shaft:11mm Hollow shaft (can be inserted in when stopped):yes Bracket fixing:extension arm chuck to fix Extension farm diameter:16mm Extension arm length 230mm Speed control:electronic Rated torque:0.4Nm Housting material:cast aluminum coating/thermoplastic polymer Allowable ambient temperature:5-40 Allowable relative humidity:80% NIN EN 6-0529 protection method :IP42 Voltage:230/115w Frequency:50/60Hz