Magnetostrictive Level Transmitters: How They Work скачать в хорошем качестве

Magnetostrictive Level Transmitters: How They Work

Magnetostrictive level sensors are similar to float type sensors in that they both use a permanent magnet sealed inside a float which travels up and down a rod with a magnetostrictive element sealed inside. They provide continuous level measurement with high accuracy, and are very effective for use in a variety of liquids. In many applications they are used in conjunction with magnetic level gages (Mag Gage) to provide visual indication along with an analog or digital output. Magnetostrictive level transmitters charge a magnetostrictive element with electric current. When the element's electromagnetic field intersects the float's magnetic field, a mechanical pulse is created. The pulse then travels back down the element at the speed of sound. Similar to ultrasonic or radar level transmitters, the distance is measured by time of flight, which corresponds to the distance from the sensor detecting the return pulse.