water meter adapts to measure the liquid ratr and total flowrate of low viscosity 1 ... optional.2.Wearable Tungsten carbonized shaft and bearing,be the same with medium of sully.3.Erode-resistant Be ... .Bi-direction Pulse,4~20mADC,total and rate display in the field.5.Power supply 5~24VDC6.Explode-proof Ex ... ,50,80,100,150,200,250,300mmSpecifocation:DN(mm)Flow range(m3/h)Medium temp.PN(mPa)Env.TempPressure ...