Dinghua Radar Instrument Training School: Advantages and features of high-frequency radar level gauge products

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High-frequency radar level gauges represent an emerging technology in the field of radar level measurement. Compared to traditional low-frequency radar level gauges, their operating frequency is typically 24 GHz, 26 GHz, or 80 GHz, whereas low-frequency radar level gauges usually use 6.3 GHz or 6.8 GHz. Currently, radar level gauges have become the mainstream products in the market, and they are mainly divided into two categories: pulse radar level gauges and guided wave radar level gauges. Although low-frequency pulsed radar level gauges have certain price advantages, they are gradually being replaced by high-frequency products in key application scenarios. In comparison, high-frequency pulse radar level gauges offer the following significant advantages: 1. Higher energy and precision: High-frequency radar level gauges feature higher transmission energy, a narrower beam angle, smaller antenna sizes, and greater measurement precision, which enables them to perform better in complex operating conditions. 2. Greater environmental adaptability: In harsh outdoor environments, radar antennas are prone to accumulating pollutants such as dust and moisture. Due to its small antenna size, high-frequency radar level gauges make it easy to install antenna covers, thereby effectively reducing the impact of contamination ； Radar antennas operating at 6 GHz are large in size and heavy in weight; not only is it difficult to install radomes on them, but cleaning them is also challenging as well, which limits their versatility and ease of maintenance. 3. More suitable for measuring small tanks: In applications involving tanks with small diameters and low heights, the 6 GHz radar antenna is relatively long (300–400 mm), which results in a larger blind zone (up to 600 mm) ； At the same time, it has poor directivity and a large beam angle, which easily leads to multipath reflections. High-frequency radar level gauges feature short antennas with good directivity, which can effectively reduce blind spots and interference, making them more suitable for accurate measurement in small tanks. 4. More suitable for measuring bulk materials: The wavelength of high-frequency radar is 11 mm, which is much shorter than the 50 mm wavelength of 6 GHz radar. When measuring the level of bulk materials, radar waves rely primarily on diffuse reflection to receive echoes; the intensity of this reflection is proportional to the size of the material particles and inversely proportional to the wavelength. Since the particle diameter of most bulk materials is much smaller than 50 mm, the 26 GHz high-frequency radar exhibits better response characteristics in level measurement, making it the preferred solution for such applications. 5. Easy for contactless installation: High-frequency radar has good directionality, and under certain harsh operating conditions, it is possible to install the radar level gauge outside the container through simple isolation measures, enabling contactless measurement and thus enhancing installation flexibility as well as the equipment’s service life. The requirements for level measurement in the metallurgical industry are complex and diverse; factors such as the properties of the medium, temperature and pressure, explosion protection levels, environmental conditions (such as dust, steam, foam), and container design (such as tanks, basins, silos) must all be taken into account. Therefore, it is necessary to conduct a thorough analysis of the operating conditions before making a selection, and carry out on-site inspections if needed, to ensure accurate measurement results. The above content provides a detailed overview of the significant advantages of 26G high-frequency radar level gauges in various applications, aiming to help users understand this product more comprehensively and serve as a reference for actual selection decisions. 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 liquid level meters, fork-type level switches, electro-hydraulic actuators, ultrasonic flowmeters, and external thermometers. 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, a convenient delivery cycle, and comprehensive “pre-sales, in-sales, and after-sales” services…