Hydrostatic level sensors and transmitters operate on the principle that the hydrostatic pressure of a liquid is directly proportional to its height. Using an isolated diffused silicon sensing element or a ceramic capacitance pressure sensor, the device converts hydrostatic pressure into an electrical signal, which is then temperature-compensated and linearly corrected to produce a standard output signal — typically 4–20mA or 1–5VDC — for accurate, reliable level measurement.