Trumsense's STT-93420I series submersible pressure liquid level transmitter is submerged directly in the liquid,like water,fuel,diesel,gasoline (PTFE vented cable is needed) to be measured and positioned as closer as possible to the tank or pool bottom,where the submersible pressure sensor (stainless probe) will measures the hydrostatic pressure, based on a specific algorithm, it is possible to directly draw conclusions about the current liquid level, that is, the height of the liquid column above it.
