Magneticinspectionoftencallsfortheuseofaspecifiedlevelofmagneticfluxwithinsteelcomponents.Ifthemagneticfluxlevelistoolow,thendefectsmaybeoverlooked:iftoohighthenspuriousindicationsmayoccur.TheMF300Bhasbeenproducedtomeasurethemagneticfluxdensityjustbelowthesurface.Themagneticfluxismeasuredsimplybyplacingtheprobeonthesurfaceofinterest.Themonitorwillmeasureconstantoralternatingmagneticfluxwhichcanbeproducedbypermanentmagnets,electromagnetsorelectriccurrents.ThemeasuredvalueisdisplayedinunitsofTesla.MeasurementsofmagneticfluxaredisplayedontheunitandcanalsobesentviaanRS232linktoaP.C.Softwareforusewiththemeterisprovidedwhichenablesdatatobesavedandenteredinspreadsheets. *磁通流量（密度）計的工作原理圖：探頭放在被檢物體上放即可。