Devices and methods of use thereof

A device comprising:

• a sample conduit providing a path for fluid flow extending from a sample inlet to a sample outlet;
• a thermal housing enclosing the sample conduit, wherein the thermal housing comprises a plurality of measurement regions;
• a detector configured to capture a spectroscopic signal from the sample conduit at one or more of the plurality of measurement regions;
• and
• a motorized stage translatable along the thermal housing from a first location to a second location, wherein the detector is coupled to the motorized stage such that the motorized stage is configured to translate the detector along the thermal housing align the detector with one or more of the plurality of measurement regions.