The Mass Flowmeters have two type as.

  1. Thermall Mass Flowmeter mostly for air or gas principle as generate constant heater, When flowing measurement difference Temperature from two sensor T1 -T2
  2. Corioris Mass  Flowmeter mostly for liquid principle as generate constant frequency into two (2) vibration tube, When liquid flowing trough the two tube, then the tube are bending , We measurement phase angle between two tube are shift.