FMB50

The hydrostatic level transmitter detects liquid level by measuring the static pressure generated by the liquid column. The basic principle is based on the formula P = ρ·g·H + P₀. When the liquid density remains constant, the atmospheric pressure is introduced into the sensor’s negative pressure chamber through the vent tube to compensate for atmospheric pressure (P₀). The liquid hydrostatic pressure (P) is directly proportional to the liquid level height (H). The process pressure acts directly on the internal sensing element, such as a ceramic process isolation diaphragm. The pressure compensation tube transfers atmospheric pressure variations to the back side of the sensing element for compensation. The deformation of the sensing element generates a capacitance change proportional to the applied pressure. The capacitance variation is converted into a pressure-proportional signal. Since the signal has a linear relationship with the medium level, it is processed through temperature compensation and linearization, and finally converted into a standard 4–20 mA output signal.

Economical

Deltapilot FMB50 Integrated Transmitter uses a condensate-resistant Contite measuring cell. It is mainly designed for process industries and hygienic applications. It is suitable for level measurement of liquids or slurries in open or closed vessels, with measurement unaffected by foam. It meets SIL2 functional safety requirements.