... displaying, touch screen 2.Speed range:0.1-150rpm 3.Flow range:0.006-570(ml/min) 4.Stainless steel housing ... LCD and touch screen technology, the operator can input the flow rate directly. Simple operation, the operating interface is intuitive. ... technology reduces working noise.l External high-low electrical level controls the start/stop,reversible direction and easy dispensing function, optically ...