There are several types of level gauges on the electrodesalination tank

Reply 1# **Winding Magnetostrictive Level Gauge: When the sensor of a magnetostrictive level gauge is in operation, its electrical circuit generates pulse currents on the waveguide wire; as these currents propagate along the waveguide wire, they create a magnetic field of pulse currents around it. A float is attached to the sensor rod of the magnetostrictive level gauge; this float can move up and down along the rod as the liquid level changes. Inside the float, there is a set of permanent magnetic rings. When the magnetic field generated by the pulsed current meets the magnetic field of the magnetic ring produced by the float, the magnetic field around the float changes, which causes a torsional wave pulse to be generated in the waveguide wire made of magnetostrictive material at the location of the float. This pulse travels back along the waveguide wire at a constant speed and is detected by the detection mechanism. By measuring the time difference between the pulsed current and the torsional wave, the position of the float, that is, the level of the liquid surface, can be determined accurately. Advantages of using magnetostrictive level gauges for measuring the liquid level in oil tanks: 1. High reliability: Since magnetostrictive level gauges operate on the principle of waveguides and have no mechanical moving parts, there is no friction or wear. The entire converter is enclosed in a stainless steel tube, remaining in non-contact with the medium being measured; as a result, the sensor operates reliably and has a long service life. 2. High precision: Since the magnetostrictive level gauge operates using guided wave pulses, it determines the measured displacement by measuring the time between the starting pulse and the ending pulse, which results in high measurement precision. Its resolution is better than 0.01% FS, a precision that is difficult to achieve with other sensors. 3. Good safety: The magnetostrictive level gauge has high explosion-proof capabilities, featuring intrinsically safe design, which ensures safe use; it is particularly suitable for measuring chemical raw materials and flammable liquids. There is no need to open the tank lid during measurement, thereby avoiding the safety risks associated with manual measurement. 4. Magnetostrictive level gauges are easy to install and simple to maintain: They are generally installed through existing pipe openings on the top of the tank, making them particularly suitable for installation in underground tanks and those that are already in use, without disrupting normal production during installation. 5. Facilitates automated system operation: The secondary instruments of magnetostrictive level gauges use standard output signals, which makes it easy for microcomputers to process these signals. This facilitates networked operation and enhances the degree of automation of the entire measurement system.