Intended for user-configurable spectroscopic transmission sampling systems, FCP-300 Series can be combined with Swagelok™ components or FCF Flow Fixtures to configure NIR or UV-visible transmission cells with pathlengths from 2 mm for liquid analysis to over 2 m for gas analysis. Each probe is sealed, evacuated, and backfilled with high grade nitrogen, preventing contamination/condensation. Welded metal sealing withstands varying chemical conditions, high pressures, and temperature extremes.