... N400 probe Coating Thickness GaugeF1 probe ( Can match with MT2100,MT3100,MT4100)F1 probe adopted magnetic method. It can measure the ... :φ7Base critical thickness :0.5F400 Probe (Can match with MT3100/4100)F400 probe adopted magnetic method. It can measure the ... diameter:φ7Base critical thickness : 0.5mmN1Probe (Can match with MT2100N/ MT3100/4100)N1 probe adopted eddy current method. It can measure ...