An evolution of the miniCTD, the Fast Profiler has been designed to deliver the highest quality CTD casts at rapid drop rates. A conductivity cell designed for optimum flow-through, a fast response thermistor temperature sensor and a 0.01% pressure sensor synchronously sampling at 32Hz deliver the highest quality profiles in a lightweight and robust package. Add in an integral fluorometer based on Valeport’s new Hyperion range, an optional Bluetooth communications module and the fastCTD Profiler offers a unique and versatile package.