A hydrostatic level transmitter is a type of level measurement device used to determine the level of liquids in a tank or vessel. It operates on the principle of hydrostatic pressure, which is the pressure exerted by a liquid due to its weight and the force of gravity. The hydrostatic level transmitter consists of a probe, typically made of stainless steel, which is inserted into the tank or vessel and positioned at a predetermined level. The probe contains a pressure sensor, which measures the hydrostatic pressure of the liquid above it. The pressure sensor converts this pressure into a proportional level measurement, which is typically output as an analog or digital signal. Hydrostatic level transmitters are highly accurate and reliable, and they are commonly used in applications where precise level measurement is critical, such as in the oil and gas, chemical processing, and water treatment industries. They can also be used in hazardous environments, as they can be constructed with explosion-proof enclosures and are compatible with a wide range of liquids. Hydrostatic level transmitters can be used to measure the level of liquids in open or closed tanks, as well as in applications where the liquid is under pressure, such as in pipelines or wellheads.