Developing the magnetic particle flaw detector for pump rod

Eddy current, magnetic leak, magnetic particle and ultrasonic test are the main methods used for pumping rod test. Every method has its own virtues, defects and suitable range. Magnetic particle testing is highly sensitive and displays directly the flaw, but the level of its automation is lower than other methods, the flaw should be eye observed when testing. As a rule, the magnetic particle test is usually used together with eddy current and magnetic leak tests. The article narrates circuit work principle, the composition, characteristics of the structure, major parameter and suitable range of the magnetic particle flaw detector. The detector is able to inspect minute flaw. 