... digital quantity, high anti-interference,reliable measurement,high precision,flow range reach to 1500:1;4.Converter adopts to 16 ... by two way: forward and reverse flow; integrated type output one wayFrenquency range:0~5KHz,uper limit 1~5 ... pipe,fault condition,forward and reverse flow,simulation volume exceeds range,pulse volume exceeds range,disconnect pulse small signalTransistor switch output ...