What type of level measuring instrument is suitable for closed tank?


#1

If the level measurement is required for a fixed and small height, a Leveltrol is more suitable.

If it is for a total height, then either a static head or a differential pressure transmitter with its HP leg connected to the bottom of the liquid level and the LP leg connected to the top of the tank to gas phase.


#2

Most of the industrial process require the amount of material in a tank or closed vessels .Close tank is also called as pressurized tank. When a liquid level measurement needed in a close tank the gauge pressure will not work because gauge pressure measures the pressure exerted by liquid and vapor pressure above the liquid.

There are two main types -

  • Dry leg level measurement
  • Wet leg level measurement