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


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.


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