Magnetostrictive level meters work based on magnetostriction effects and ultrasonic time-of-flight measurements. A pulse current passing through a waveguide creates a circumferential magnetic field that interacts with a permanent magnet inside the float, inducing a torsional wave due to the magnetostrictive effect. By measuring the time difference between the emission of the current pulse and the return of the torsional wave, the precise liquid level can be calculated. Known for high accuracy (typically ±0.01%FS), resolution down to 0.1 mm, and non-contact measurement, these meters are widely used in industries like petroleum, chemicals, and food. Installation should avoid strong magnetic interference, ensuring free movement of the float, and regular maintenance checks on the waveguide and float status are necessary to ensure measurement accuracy.