A review. Thanks to their unique optical and electrochem. properties, conjugated polymers have attracted considerable attention over the last 2 decades and resulted in numerous technol. innovations. In particular, their implementation in sensing schemes and devices was widely studied and produced a multitude of sensory systems and transduction mechanisms. Conjugated polymers possess numerous attractive features that make them particularly suitable for a broad variety of sensing tasks. They display sensory signal amplification (compared to their small-mol. counterparts) and their structures can easily be tailored to adjust soly., absorption/emission wavelengths, energy offsets for excited state electron transfer, and/or for use in soln. or in the solid state. This versatility has made conjugated polymers a fluorescence sensory platform of choice in the recent years. In this review, the authors highlight a variety of conjugated polymer-based sensory mechanisms together with selected examples from the recent literature. [on SciFinder(R)]