Light-Guiding Flow Cells And Analytical Devices Using The Same

A flow cell for a photometric device includes a module having a body with a distal face defining an annular channel. The body also defines an axial central passage and an axial flow channel. A second module has a body with a proximal face defining an annular channel. The second body also defines an axial flow channel in fluid communication with the first axial flow channel. A light guiding member is within the central passage for exposing a fluid in the flow channels of the modules. An assembly seals an interface between the distal and proximal faces such that the fluid does not leak from the flow channels. The assembly has a metal gasket between the distal and proximal faces, the metal gasket defining a flow path between the flow channels, a first sealing member in the first annular channel and a second sealing member in the second annular channel.