The SolidSpec 3700/3700DUV works as a UV-VIS-NIR spectrophotometer with a PMT detector for ultraviolet signals as well as PbS and InGaAs detectors for near-infrared materials. These are designed to analyze the inside areas of any unit and will work with a sensitive setup that is capable of analyzing materials in many forms. It has a greater sensitivity level than older models that used photomultipler tube detectors to analyze visible light and PbS detectors that only cover near-infrared materials. This SolidSpec model can also analyze materials in switchover procedures with a wider wavelength than what you may experience in some older models. This can work with low absorption rates for deep UV light sources to make the analysis process easier to maintain.