Advantages and disadvantages and selection of 4 types of liquid level gauges

by:Kaidi Sensors     2022-10-30
The liquid level gauge is to measure the height of the liquid level in the tank or box, and display the height of the liquid level inside. The liquid level has a wide range of uses. There are various liquid level gauge measuring equipment on the market. The advantages of liquid level gauges and externally mounted liquid level gauges. 1. Its structure is mainly designed and produced based on the principles of buoyancy and magnetic force. The position of the float with the magnet in the measured medium is affected by buoyancy. The change of the liquid level leads to the change of the position of the magnetic float, and the static magnetostatic coupling effect of the magnetic float and the magnetic flap causes the magnetic flip column to turn 180°, which in turn reflects the liquid level in the container. With the electronic module and transmitter module composed of sensors and precision electronic components, it can transmit and output resistance value signal, current value (4-20mA) signal, switch signal and other electrical signals. So as to realize the perfect combination of on-site observation and remote control. The advantages are: simple structure, convenient use, stable performance, long service life, easy installation and maintenance. 2. Steel belt level gauge The steel belt level gauge is a traditional level gauge. It is designed and manufactured using the principle of mechanical balance. When the liquid level changes, the original mechanical balance will reach a new balance through the movement of the steel belt under the disturbance of the buoyancy of the float. The liquid level detection device drives the steel belt to move according to the liquid level, and the displacement transmission system drives the transmission pin to rotate through the movement of the steel belt, and then acts on the counter to display the liquid level. Scope of application and characteristics: The steel belt level gauge has the advantages of strong practicability, large measurement range, high performance and stable accuracy, long service life, and easy maintenance. In addition, the large-scale counter display makes the reading clear and accurate; the manual float lifting mechanism can check the working condition of the instrument at any time; it can be connected with a variety of transmitters to form a liquid level detection system. 3. Guided wave radar level meter Guided wave radar level meter is a microwave level meter, which is an application of microwave positioning technology. It transmits energy waves through a device that can transmit pulse signals. The energy waves are transmitted in the waveguide, and the energy waves are reflected by obstacles. The reflected energy waves are transmitted from the waveguide to the receiving device, and then the receiving device receives the reflected signal. The change of the material level is determined according to the time difference of the movement process of the measured energy wave. The microwave signal is processed by the electronic device and finally converted into an electrical signal related to the material level. Guided wave microwave level instrument is used for continuous contact measurement of liquids, slurries and granular materials with relatively small dielectric constants. It has the following characteristics: strong versatility, anti-hanging material, maintenance-free, anti-interference, accurate and reliable. 4. Externally attached ultrasonic level gauge The externally measured level gauge is based on the time domain echo principle of ultrasonic pulses. The ultrasonic sensor of the externally measured liquid level gauge sends out ultrasonic pulses, and the ultrasonic wave propagates in the liquid after passing through the bottom of the tank and reaches the liquid. After the interface with the gas, it is reflected back to the detector again. The external liquid level gauge obtains the height of the liquid by calculating the time difference and the propagation speed of the ultrasonic wave in the liquid. This measurement method of the external level gauge truly realizes the non-invasive measurement of 'penetrating through the wall'. The measurement with the external level gauge does not require opening holes on the container, especially for high pressure, strong corrosion, and toxic and harmful conditions. Suitable for. The liquid level measurement in the major hazardous source tank area has great advantages. The advantages are also obvious, no need to open holes on the tank, easy installation and maintenance,
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