The secondary instrument of the Magnetostrictive Level Transmitter adopts standard outputsignal to easily process the signal for microcomputers, it is simply to realize online work and improve the automation degree of the whole measuring system. The Magnetostrictive Level transmitter consists of three parts: probe rod, circuit unit, and float When measuring, the circuitunit generates a current pulse and this pulse transmits downward along the magnetostrictive line and thus generates a ring-form magnetic field. The float is equipped probe rodout side and the float along the probe rod moves upward and downward with the change of the liquid level. Because a group of permanent magnets is mounted inside of the float, the float generates a magnetic field at the same time. When the current magnetic field encounters the float magnetic field, a “twisted” pulse, or called “Return” pulse will be generated. Convert the time difference between the “Return” pulse and current pulse into a pulse signal, and then calculate out the actual position of the float to accomplish the liquid level measurement.