E39-F1 - 

Lens Kit, M2.6 x 0.45 mm Mounting Screw Size, Use with Plastic and Glass Filament Cables

A fiber-optic sensor system consisting of an optical cable and an amplifier. The amplifier emits, receives and converts the light energy into an electrical signal. The fiber optic cable, on the other-hand, is the mechanical component that transports light energy, into and out-of areas that are either too space constrained or too hostile, back to the amplifier.
Extensive selection of fiber-optic sensing heads offer many unique solutions for tough problems. For custom fit, most plastic filament cables can be cut to length. Highly flexible fibers with minimum 1 mm bending radius allows cables to conform to machine contours.