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