1. Mechanical scraper
In this system, each electrode is equipped with a rotary scraper, and the blade of the scraper is perpendicular to the surface of the electrode. The shaft of the scraper is driven by an external motor or manually through a hydraulic seal. It can run continuously or intermittently. The shaft of the scraper is driven by an external motor or manually through a hydraulic seal. It can run continuously or intermittently. This method is generally seldom used in modern electromagnetic flowmeters.
2. Detachable electrode
The detachable electrode adopts mechanical valves and sealing devices, so the electrode can be disassembled (usually under the working pressure of the pipeline) for external inspection and cleaning.
3. Electrolysis or "burning off" method
In this method, the voltage of the power supply is connected between the two electrodes (the secondary device is automatically disconnected during this operation), which causes electrolysis to occur on the surface of the two electrodes, and quickly releases gas, which leads to the removal of deposits. This method is generally used for oily, oily, and sludge coverings. The heating of the electrode can also remove the fat and oil deposited from the sewage.
4. Ultrasonic cleaning
An external oscillator and sensor are used to induce high-energy ultrasonic waves on each electrode axis. By selecting the length of the motor shaft and the frequency of the ultrasonic wave, antinodes are generated on the surface of the electrode, so that the local cavitation formed on the electrode can remove the deposits. This method is generally used for the cleaning of crystalline coatings.