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Abstract: A novel device is being designed to determine lead in aqueous solutions for application to environmental and biological samples. Lead-templated polymers have been developed as selective sequestering agents and have been fabricated into membranes and used in ion-selective electrodes. Fluorescent lead complexing agents are now being used to develop a metal ion-templated polymer to serve as a sensing element for an optical device for the determination of lead ions. The lead complex shifted ligand fluorescence will be excited by a compact laser and monitored via an optical fibre by either a filtered photometer or a monochromator. Sensitivity based on fluorometric detection coupled with the chemical selectivity of a templated polymeric film will result in a large dynamic range of measurement and low limit of detection