TQ 402 Proximity Transducer.  Probe tip Ø 8.2mm, measuring range 2 or 4mm, matching IQS 450 signal conditioner (coding B2X).  P/N: 111-402-000-012-Ax-Bx-Cxxx-Dxxx-Exxx-Fx-Gxx-Hxx  (Customer required to specify "xx" values when placing order - See datasheet 265-062 for detailed information)