The FS5 is a fully integrated, purpose-built spectrofluorometer designed to meet the highest measurement specifications in the research and analytical markets.  To achieve optimal sensitivity, resolution, and acquisition speed, we select only the optimal performance photomultipliers in temperature stabilised housings, and utilise an optical design that includes plane, spherical, toroidal, ellipsoidal mirrors and optimised mirror coatings; the FS5 is truly unrivalled in its spectral performance and sensitivity.