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In brief, frequency-modulated continuous-wave radar level gauges use high-frequency signals that vary linearly during measurement. The signal from the radar level gauge is emitted by the antenna, reflected by the surface being measured, and the echo is received by the antenna. The frequency difference between the emission of the radar level gauge signal and the reception of the echo is used for further signal processing; this frequency difference corresponds to the measured distance. A large frequency difference corresponds to a larger measurement distance. The FFT frequency difference is converted into a spectral difference, which is then used to determine the measurement distance. The difference between the level and the measurement distance depends on the height of the empty tank. The feature-rich FM continuous-wave radar level gauge is the first and only FWCM radar level gauge to incorporate two-wire technology. Thanks to its advanced contactless antenna technology, it is easy to maintain; it can replace switches, ultrasonic measuring devices, and pressure transmitters. It offers low cable costs, as well as high precision and high repeatability. The principle-based FMCW radar level gauge operates on the FMCW principle. Using linearly frequency-modulated high-frequency signals, the transmission frequency of the radar level gauge’s high-frequency signal increases linearly over a certain time interval (scan frequency). Since the transmission frequency changes as the signal travels, it is proportional to the distance from the reflecting object; the level height is determined by the difference between the current transmission frequency and the received reflected frequency. Xi’an Dinghua Electronics Co., Ltd., established in 1992 and currently located in Xi’an, Shaanxi Province, is a high-tech enterprise that specializes in the research and development, production, sales, and engineering services of radar level gauges. At present, the company offers a range of products including radar level gauges, external measurement level instruments, fork-type level switches, electro-hydraulic actuators, ultrasonic flow meters, and external temperature sensors. All of these products have withstood numerous complex operational conditions in real-world settings, and they are widely used in industries such as petroleum, chemicals, power generation, coal mining, metallurgy, as well as food and pharmaceuticals. Professional product selection guidance, superior product quality, reasonable pricing, short delivery times, and comprehensive “pre-sales, in-sales, and after-sales” services…