Identifying NanoScope AFM Equipment Controllers NanoScope IIIA NanoScope IV Small Sample Systems Including Multimode and Contact Mode Multimode Overview. B=Base, S=Scanner, H=Optical Head Small AFM (Multimode or Contact Mode) – Ordinary Scanner Small AFM (Multimode or Contact Mode) – Vertical Engage Scanner Large Sample Systems Dimension 3000 (3100 substantially similar) Dimension 5000 Dimension “G” Scanner.