The SMF 2 - SMP (Surface Monitoring Probe) is a direct reading spectrofluorimeter which uses short wavelength UV to excite materials of interest on surfaces and detects the resulting fluorescence. The materials efficiently detected by this technique include all fluorescent dyes, which may be incorporated in products as diverse as inks, polymers, oil and water, paper and domestic products, as well as naturally occurring fluorescent materials such as some pharmaceuticals and environmental pollutants.