The Instant Screener is a compact sample fluorescence analyzer based on Spectral Fluorescence Signature (SFS) technology. The ability of the Instant Screener to detect and quantify substances in non-water environments is the next step in the application of SFS technology. The real-time capabilities of the Instant Screener offer unique applications in permanent process monitoring as well as for instant spot or random sample analysis. The majority of Instant Screener applications do not require sample pre-treatment nor do any tests require complex compound separation. This makes the Instant Screener an extremely versatile instrument for a variety of diverse applications.