Level gauge

According to the design selection specifications, electrical level measurement is related to the dielectric constant; therefore, when the temperature and pressure of the medium remain stable and the dielectric constant stays constant, the measurement is accurate.

Capacitive level gauges can be used to measure non-conductive materials (liquids) without any problem. I agree with what was said above: the properties of the medium must not change, and it is necessary to determine its dielectric constant accurately; if the dielectric constant remains constant, the measurements will be precise.

The object being measured by a capacitive level gauge has no inherent relationship with whether it is conductive or not. A capacitive level gauge consists of a capacitive level sensor and a corresponding measurement circuit. The measured liquid level is converted into a corresponding capacitance by a capacitive level sensor; the changes in this capacitance are detected by the measurement circuit, thereby allowing an indirect determination of the changes in the liquid level. Capacitive level sensors operate on the principle of cylindrical capacitors. Depending on the electrical conductivity of the fluid being measured, these sensors can be divided into two types: those designed for measuring conductive fluids such as water, and those designed for measuring non-conductive fluids such as oil. The two electrodes of traditional level gauges for measuring non-conductive liquids both come from capacitive level sensors. The change in capacitance is caused by the variation in the electrolyte constant between the electrodes, which results from changes in the liquid level of the liquid being measured. A level gauge for measuring conductive liquids is simply an electrode covered with insulating material, with the other electrode coming from the conductive solution (including the container wall if it is also conductive). This involves using the change in height of electrodes coated with insulating material and immersed in a conductive solution to induce changes in the electrodes. When using capacitive liquid level timing, care should be taken regarding the adhesion of viscous liquids to the electrodes to avoid affecting measurement accuracy ； When measuring the level of non-conductive liquids, measurement errors resulting from changes in the liquid’s dielectric constant due to temperature, impurities, and composition must be taken into account. That’s all; I hope it’s useful