ESMDR200 Two-electrode capacitance level gauge for liquid oil solid

This capacitive level meter measures liquid level based on the principle of capacitance sensing, with the core idea being to reflect the height of the liquid level by detecting changes in the capacitance between the two electrodes of the sensor. The specific working process is as follows:

1.Capacitance Formation: The metal probe of the level meter acts as one electrode, while the wall of the measured container serves as the other electrode. The dielectric between the two electrodes consists of the measured liquid and the gas (or other medium) above it.
2.Capacitance Change: Because there is a difference between the dielectric constant ε₁ of the liquid and ε₂ of the medium above the liquid (usually ε₁ > ε₂), when the liquid level rises, the overall dielectric constant between the two electrodes increases, resulting in an increase in capacitance; conversely, when the liquid level falls, the dielectric constant decreases, and the capacitance decreases accordingly.
3. Signal Conversion and Output: The specialized circuitry inside the sensor detects and processes the changes in capacitance, converting them into an electrical signal proportional to the liquid level. After amplification, calibration, and other steps, a standard 4–20 mA analog signal or digital communication signal is output, enabling real-time monitoring and transmission of the liquid level.For conductive measured media, an insulating layer is applied to the surface of the metal probe to prevent direct conduction between the electrode and the medium, ensuring measurement accuracy.

1. Dual-electrode induction design, stable detection, high resolution, not easily false-triggered
2. No moving parts, no float, no wear, no jamming, long lifespan
3. Compatible conductive liquids: water, sewage, chemical solutions, acidic and alkaline liquids, emulsions
4. Small size, easy to install, thread/insertion types available, suitable for small tanks
5. Waterproof and dustproof, temperature and corrosion resistant, suitable for harsh industrial environments
6. Fast response, foam-resistant, accurate liquid level detection
7. Simple signal output, can be directly connected to PLC, relay, or controller

Water purification equipment, sewage treatment, chemical medicine boxes, air compressor water replenishment, refrigeration units, lithium battery equipment, food machinery, boiler water shortage protection, automated circulating water tanks, small sealed tank liquid level monitoring.