What are the advantages and disadvantages of magnetostrictive level gauge

What are the advantages and disadvantages of magnetostrictive level gauge

Magnetostrictive level gauge can be applied to measure the interface between two different liquids, explosion-proof design, suitable for dangerous

Occasionally, the intelligent electronic circuit design can calculate the volume: * The movable part is a float, and the maintenance is extremely low.

The core of the magnetostrictive liquid level sensor includes a measuring sensing element of ferromagnetic material, generally called a "waveguide", a movable permanent magnet, and the magnet and the waveguide will generate a longitudinal magnetic field. Whenever a current pulse (ie, the "interrogation signal") is sent from the sensor electronics head and through the waveguide, a second magnetic field is created by the radial aspect of the waveguide. The waveguide produces a "magnetostriction" phenomenon, where a strain pulse is generated instantaneously. This pulse, called the return signal, travels at ultrasonic speed from the point of generation (ie, the point of position measurement) back to the sensor electronics head and is detected by the detector.

Advantage:

1. The magnetostrictive liquid level gauge is suitable for liquid level measurement of clean liquid level with high precision requirements, and the accuracy can reach 1mm.

2. It can be applied to the interface measurement between two different liquids,

3. The biggest advantage of magnetostriction lies in its extremely high resolution, which can be achieved in the micron level. A typical application is to measure the position of a rolling mill load hydraulic cylinder. But the design here is not the same as level measurement. The position measurement of the hydraulic cylinder is not that the hydraulic oil drives the magnetic ring (ie, the floating ball), but the movable part of the cylinder body drives the magnetic ring to move through the mechanical structure, so the position is very clear. Usually, the precision requirements of the rolling mill for the thickness of the sheet are usually several to tens of microns, so the resolution of the magnetostrictive sensor must reach the micron level.

4. The explosion-proof intelligent electronic circuit design can calculate the volume

5. Magnetostrictive liquid level gauge * The movable part is a float, and the maintenance is extremely low. It is used in liquid level measurement of various storage tanks and has the characteristics of strong environmental adaptability and convenient installation.

Compared with liquid level gauges such as radar, it has a very high cost performance and many functions in short-range measurement. The display screen has current, temperature and interface display. This is exactly why the magnetostrictive level gauge can become the most common and most common use in measuring tanks such as gas stations today.

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Shortcoming:

1. The anti-interference ability is slightly poor (generally not recommended to be used in places with strong electromagnetic radiation such as power plants).

2. It must be a contact measurement, but the real measurement unit is not in contact with the liquid, and only its protection tube is in contact with the liquid.

3. The medium is in direct contact, the floating ball sealing requirements are strict, and the viscous medium cannot be measured.

4. Installation is limited. Higher installation and maintenance requirements, so the market is not widely used.