Measurement principle and advantages and disadvantages of magnetostrictive liquid level gauge (sensor)

What is the measurement principle of the magnetostrictive level gauge? What are the advantages and disadvantages of magnetostrictive level gauges? 1. Measuring principle The magnetostrictive liquid level sensor part is designed based on the principle of magnetostriction. It is composed of a sensitive waveguide wire, a waveguide, a movable magnet and an electronic component that emits electrical pulse signals and receives return signals. When the electric pulse generated by the microwave generator is transmitted along the waveguide wire in the steel pipe, the electric pulse is accompanied by an annular magnetic field perpendicular to the waveguide wire and is transmitted along the waveguide wire at the speed of light at the speed of light. When the pulsed annular magnetic field and the magnetic float magnetic field meet, the magnetic field vectors of the two are superimposed to form a spiral magnetic field, which generates an instantaneous torsion force and forms a mechanical torsion wave on the waveguide wire. The terminal generates pulse induction. By measuring the time difference between the generated pulse and the inductive pulse generated by the return of the torsional wave, the measured liquid level can be accurately calculated. At the same time, the temperature sensor is placed in the measuring rod, and the temperature of the medium can be continuously measured. 2. Features ● Widely used in high temperature and high pressure liquid and corrosive liquid environments; Rod probe with a maximum measurement distance of 6 meters, temperature range: -40-400℃; Cable probe with a maximum measurement distance of 20 meters; For corrosive liquids, special Flon, PTFE probe rod and float; For layered liquids, it can measure boundary level and liquid level at the same time; ● High precision, ±0.5mm or ±mm; ● High resolution, fast response, ● Multiple data output options; 4 -20mA analog signal Modbus RS485 ● A variety of output methods are available; ● With reverse polarity protection; ● Anti-lightning, anti-radio frequency interference, easy installation, no need for regular calibration and maintenance; Disadvantages: Advantages: 1. The magnetostrictive liquid level gauge is suitable for the liquid level measurement of the clean liquid level with high precision requirements, and the accuracy can reach 1mm. 2. It can be used to measure the interface between two different liquids. 3. It has a very high resolution and can achieve micron level. 4. The explosion-proof intelligent electronic circuit design can calculate the volume. 5. The movable part of the magnetostrictive liquid level gauge is a float, and the maintenance is low. Compared with liquid level gauges such as radar, it is cost-effective in short-range measurement. Disadvantages: 1. Poor resistance to electromagnetic radiation interference (not recommended for use in places with strong electromagnetic radiation such as power plants). 2. Must be contact measurement. 3. The medium is in direct contact, and the floating ball sealing requirements are strict, and the viscous medium cannot be measured. 4. Installation is limited. Higher installation and maintenance requirements are not widely available in the market.
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