... .Compact, light 5. Auto-measure Eddy Current Metal Detector for pipe ,bar ,tubeEddysun is one of the well ... :AC 220VMagnetic memory detection with expandable 8-frequencyFlux Leakage detection with expandable 8 channelsWeight :6KgApplicationSMART-35++ metal detector is specialy applied ... ,it is used for the pre-service and offline detection for four boiler tubes,pipeline,water gas pipeline ,the material ...