A chemical plant uses a radar level meter to measure a process tank with a distance of 2 m. The measurement medium is chloromethane and the temperature is 13°C.
The failure phenomenon is that during the production process, after pressurization, the instrument measurement data is abnormal and the level value cannot be read.
After analysis, it is found that the dielectric constant of chloromethane decreases at high temperatures, and this radar level meter can only measure the dielectric under normal conditions, with a constant greater than 3.
The solution was to install a waveguide tube to enhance the strength of the reflected wave, which worked well after modification.