Ultrasonic radar level meter

Ultrasonic radar level gauges are actually divided into ultrasonic level gauges and radar level gauges. These two level gauges are also two commonly used measurement tools for level measurement on the market. As non-contact level gauges, because they will not come into contact with the medium, they are often used in some complex working conditions or occasions with special requirements. If you are interested in ultrasonic radar level gauges, you must have an understanding of their principles, applications, characteristics, and parameter selection.　　 First is the basic principle of ultrasonic level gauge. The ultrasonic level meter is a digital level meter controlled by a microprocessor. The ultrasonic level meter consists of three parts: ultrasonic transducer, processing unit, and output unit. In the measurement, the ultrasonic pulse is emitted by the sensor (transducer), and the sound wave is reflected by the liquid surface and then received by the same sensor or ultrasonic receiver, converted into an electrical signal by a piezoelectric crystal or magnetostrictive device, and transmitted and received by the sound wave The time between to calculate the distance from the sensor to the surface of the liquid being measured. The principle of the radar level gauge is to use the microwave pulse measurement method, and it is normal in the industrial frequency band, and the beam energy is low. It can be installed in various metal and non-metal containers or pipelines. The level of pellets is continuously measured in a non-contact manner. The radar level gauge is suitable for occasions with large changes in dust, temperature and pressure, and the presence of inert gas and steam. The radar level gauge is not harmful to the human body and the environment, and it is not affected by the specific gravity of the medium, not affected by the change of the dielectric constant, and does not need on-site calibration. It is not for industrial needs or economical for customers. Consider it, both are good choices.　　The second is the application. Ultrasonic level gauges and radar level gauges use non-contact measurement, and the measured medium is almost unlimited. They can be widely used for measuring the height of various liquids and solid materials. Common application conditions, such as manholes, factory water tanks, tanks, municipal engineering, tap water, sewage treatment, water conservancy and hydropower, steel, coal, electricity, petrochemical, urban rivers and lakes, transportation and food processing industries.　　 Next is the characteristic. Ultrasonic level meter has the following advantages. 1. Automatic power adjustment, gain control, temperature compensation 2. Physically sealed, integrally sealed with the housing to prevent the probe from affecting the performance of the whole machine when the probe is damp 3. Waterproof design, streamlined housing, working in the open air, rainwater cannot enter the housing along the cable , Avoid internal circuit damp 4. Multiple output forms: programmable relay output, high-precision 4-20mA current output, Rs-485 digital communication output split ultrasonic level probe 5. Strong anti-interference. The upper and lower limit nodes and online output adjustment can be set arbitrarily, with on-site display, analog quantity, switch quantity and RS485 output can be selected, and it is convenient to interface with related facilities.　　 And the radar level meter is more powerful than the ultrasonic level meter in some functions. Some measurement conditions that the ultrasonic level meter cannot achieve can be realized by the radar level meter.　　 Finally, there are parameters and selection. Taking the most common parameters, measuring ranges, the common ones are 5m, 10m, 15m, 20m, 30m, 40m, 50m, 60m, 80m. In addition to the range, there are other accuracy. Theoretically, the accuracy is divided into 0.5% and 1%, but in fact, because of the different working conditions on site, the accuracy is often poor, but the accuracy of the radar can reach the highest accuracy of 3mm. In addition, there are output signals, which can be divided into analog output, digital output, switch output, HART output, etc. Analog output can be divided into 2-wire system 4-20ma output, 4-wire system 4-20ma output, digital output can choose RS485, RS232, relay switch output can choose AC250V/5A or DC30V/5A, HART output is divided into two-wire system And four-wire system. In addition, there is power supply, standard 24vDC, optional 220v, 50Hz. The last is installation, which can be divided into thread and flange installation.　　 In summary, it is the principle, application, characteristics, and parameter selection of ultrasonic radar level gauge. I believe that after reading it, you must have a general understanding of the ultrasonic radar level meter, right? At present, the product of Kaidi Sensing Co., Ltd. has a relatively large market share. Since its launch, it has been widely received by consumers in the market. Welcome. If you want to know or purchase, it is recommended that you can directly find Kaidi Sensing.
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