FMX11

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

Foundamental

The Waterpilot FMX11 hydrostatic level transmitter is typically used for hydrostatic level measurement in environmental applications. It is certified for drinking water applications and can be used in wells, storage tanks, water towers, dams, gauging stations, lakes, and rivers.