Today, with the increasing popularity of intelligent and automated technology, liquid level monitoring has become an indispensable part of many fields. Among them, the double-rod capacitive level sensor has been further strengthened in medium perception and signal transmission, and has won the favor of the majority of users. So, how does this mysterious "hero behind the scenes" achieve accurate level measurement? Let's uncover how a double-rod capacitive level sensor works.
The core of the double-rod capacitive level sensor is to use the capacitance change to sense the change of liquid level. The basic structure consists of a pair of parallel and fixedly spaced electrodes (so-called "double rods"), which are usually completely submerged in the liquid to be measured after being encapsulated.
As the liquid level rises or falls, the liquid gradually fills or drains the space between the electrodes. Since the dielectric constant of a liquid is different from that of air, the capacitance between the two electrodes changes as the liquid level changes. This is because the size of the capacitance is closely related to three factors: the plate area, the distance between the plates, and the relative permittivity of the medium.
In other words, a double-rod capacitive level sensor indirectly measures the level height by detecting changes in capacitance between electrodes. This change is converted into an electrical signal, which is processed and converted by the built-in circuit to output an analog or digital signal corresponding to the actual liquid level, so as to achieve real-time accurate measurement of the liquid level.
In general, the double-rod capacitive liquid level sensor relies on scientific principles and takes exquisite design as a means to achieve a high degree of intelligence and precision in liquid level measurement, which shows strong practical value and technical charm in both industrial production and environmental protection monitoring.