Capacitive Liquid Level Sensor for Pipeline Level Measurement

Capacitive level sensors do not have high requirements regarding the conductivity of the medium. They can measure both conductive media (such as water, acids, and alkalis) and non-conductive media (such as oil). The key lies in the difference in dielectric constant. If the dielectric constant of the medium is very low, the measurement performance can be improved by increasing sensitivity, adjusting calibration, or lengthening the probe. Therefore, its applicability is wider than that of electrode-type level gauges.

Generally not. Capacitive level sensors measure capacitance changes and do not rely on sound waves or optical reflections. Therefore, vapor, foam, and smoke have little impact on the measurement. This is one of the reasons why they are superior to ultrasonic and photoelectric level sensors. However, if foam adheres to the probe and forms a thick layer, it may slightly change the capacitance value, so regular cleaning is recommended.

Yes. Capacitive level sensors are suitable for high-viscosity media such as grease, syrup, glue, and sludge because the measurement is not dependent on flowability. However, if the adhesion is too thick, it can cause capacitance shift. Anti-stick probes, PTFE sheaths, or high-frequency measurement circuits can be selected to reduce adhesion errors. In high-viscosity environments, it is recommended to regularly inspect the probe surface.