The TD-4100 XDC is a ‘closed-cell’ version of the rugged, world industry-standard TD-4100 XD oil-in-water monitor. It was designed for clean water and dirty water applications, where fouling can be controlled by chemical injection or optional on-board cleaning systems.

It utilises a clear tube flow cell to contain the sample water at pressure to prevent oxygen contamination in steam systems and to return the sample to the process at pressure. It uses a unique internal cell condition monitor to alert operations of the need for cleaning or to trigger the optional on-board cleaning system. As with all Turner monitors, it includes a field validation method.