... digital electronic technology, electro-magnetic technology, magnetic flux leakage technology and microprocessor technology, real-time effective ... costs. Main Technical Data of Intelligent digital magnetic flux leakage testing machineDetection channels: 4,8,16 ( ... ~ 2000hz, high-pass: 0hz ~ 2000hzApplications of magnetic flux leakage detectorApplicable to steel parts, steel billet, round steel. ...