Selection issues for radar level gauges

Is there a lot of foam? Is the foam height high? Do we need to measure the height of the foam? I tried to create a level gauge with foam, but it was extremely difficult. The medium was also heated, and when the temperature exceeded 100 degrees, it became impossible to take any measurements at all, regardless of whether there was foam or not

A radar level gauge, also known as a microwave level gauge, is an abbreviation derived from the initial letters of the English phrase “RAdio Detection And Ranging”. A microwave level gauge emits electromagnetic waves toward a target, and these waves return to the source after being emitted. A receiver installed at the source captures the reflected waves and compares them with the transmitted waves to determine the presence of a target and its distance from the source. The common working principles of microwave level gauges used in the market today are mainly FMCW (continuous frequency modulation) and pulse types. FMCW radar level gauges use linearly modulated high-frequency signals, typically microwave signals of 10GHz or 24GHz. It is an indirect measurement method based on complex mathematical formulas, which calculates the level distance from the spectrum. The antenna emits a continuously modulated high-frequency microwave signal for scanning, while simultaneously receiving the returning signal. The frequency difference between the transmitted microwave signal and the returning microwave signal is proportional to the distance from the surface of the medium. Pulse radar level gauges, similar to ultrasonic technology, use the time difference principle to calculate the distance to the surface of the medium. The device transmits pulses at a fixed frequency, and then receives and creates an echo pattern. The propagation time of a signal is directly proportional to the distance to the medium. However, unlike ultrasound which uses sound waves, radar uses electromagnetic waves. It uses tens of thousands of pulses to \"scan\" the container and obtain a complete echo image. The typical frequency bands for radar level gauges are 5.8 GHz, 10 GHz, and 24 GHz. We usually refer to frequencies of 5.8 GHz (or 6.3 GHz) as C-band microwaves ； A frequency of 10 GHz corresponds to X-band microwaves; a frequency of 24 GHz (or 26 GHz) corresponds to K-band microwaves. The gain coefficient and beam angle of the radar level gauge are related to the wavelength of the microwaves as well as the size of the funnel shape of the radar level gauge. Therefore, an increasing number of radar level gauge manufacturers are beginning to develop models that use high-frequency microwave technology to improve the performance of these gauges. At the same time, by using high-frequency technology, it is possible to **reduce the size of the antenna while improving radar performance, thereby making installation easier. Since the microwaves used in radar level gauges are a type of electromagnetic wave that does not require a medium for propagation, there is essentially no need to consider the effects of volatile gases and vapors, temperature, pressure (vacuum), or even dust. Moreover, since it operates on the principle of echo reflection ranging (TOF), radar level gauges do not suffer from issues such as wear and tear, so they basically require no maintenance ； The top-mounted design also makes installation easier ； Moreover, due to the properties of microwaves, its accuracy generally reaches 0.1% across the entire measurement range, compared to other level measurement methods. Due to these unparalleled advantages, an increasing number of tank users are turning to radar level gauges to replace other technologies. The light oil media of this type include gasoline, naphtha, petroleum, etc. Generally, it produces certain volatile gases, and its dielectric constant is low

This post was last edited by zxb1990 on 2015-9-9 at 10:38. Radar level gauges are used for measuring viscous liquids; their primary function is to determine the liquid level. In automated measurement systems for storage tanks, they require the use of pressure sensors and temperature sensors as well. The level, weight, and temperature can be measured with accuracy comparable to that of manual methods, but the oil-water interface and density cannot be determined in this way. However, I recommend using servo level gauges, in particular the BJLM-80H multi-functional servo level gauge produced by Beijing Junyou Xinye Technology Co., Ltd. The BJLM-80H servo level gauge is used for the automatic measurement of all parameters related to lightweight liquids; its main functions include measuring the liquid itself, its density, temperature, the oil-water interface, and the sediment at the bottom of the tank. The absorption storage tank metering system does not require any additional equipment, and it fully meets the accuracy requirements of manual metering. If you need it and want to know more, feel free to send me a private message.

Hehe, be careful to avoid this from happening in the future! Thanks for the reminder.

Radar level gauges are used for measuring viscous liquids; their primary function is to determine the liquid level. In automated measurement systems for storage tanks, they require the cooperation of pressure sensors and temperature sensors. The level, weight, and temperature can be measured with accuracy comparable to that of manual methods, but the oil-water interface and density cannot be determined in this way.

Don’t worry, OP; it’s absolutely fine to use foam for measurement. In the alumina industry, during the leaching process, the temperature is 200 degrees, there is a high amount of steam, stirring also takes place, and the foam generated can reach a thickness of 1 meter. I can show you photos of the app.