The level detection of liquefied balloon containers in petrochemical companies is more complicated. Radar level gauges or fiber optic level gauges are generally used. However, they must be opened in the spherical tank. As a pressure vessel, the more openings in the container, the lower the safety factor of the pressure vessel, and the use of sonar-type sensors. The level gauge is a good way to avoid opening holes in the liquefied bulb.
The sonar-type external measuring level meter uses the ultrasonic equipment installed outside the tank and the pipeline to measure the liquid state of the equipment. The ultrasonic signal is continuously transmitted through the outer wall of the device into the liquid to be measured, and then the echo signal is detected by the sensing element. The reflection echo emitted and received is related to the height and density change of the liquid to be measured, and the measurement result is calculated through the electronic circuit. The calculated measurement can be a binary output, analog or digital.
In sonar-based external level gauge applications, the measured liquid contains a small amount of gas or solid particles. There should be no or a small amount of sediment at the bottom of the tank. The tank can be made of the same material (such as: plastic, glass, stainless steel, carbon steel, etc.).
The sonar-type external measuring level meter is a transmitting unit that emits ultrasonic waves through the container wall, and the velocity of the ultrasonic signal propagating in the liquid at the speed of sound is between the filtered signal reflected by the inner wall of the container and the signal reflected by the liquid surface. intermediate. The time difference of the secondary sensor receiving the reflected signal is proportional to the height of the liquid surface, and any other multiple reflections in the calculation are compensated.
Sonar-type external level gauges measure continuous level. The ultrasonic sensor is installed at the bottom of the tank or container, and the ultrasonic wave indicates the height of the liquid surface when the time difference through the liquid is reached, and is converted into an analog output signal, and a switch output signal of high and low liquid level alarm can also be provided.
The installation of sonar-type external measurement level gauge does not require hot-swap and hole-opening. It is an external measurement. The installation is magnet adsorption, and it is extremely convenient for installation and maintenance. It is widely used in measurement and control of the liquid level of spherical tanks and horizontal tanks in the petrochemical industry.
The sonar-based external measurement level meter produced by Dinghua Electronics adopts a unique algorithm and technology to overcome the impact of liquid fluctuation caused by tank feeding or temperature change on the liquid level measurement and ensure the stability of the measurement. Easy to install personnel to operate, save time and improve efficiency.
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