The Q-Eye PSC and the Q-Eye PSC Portable flow meters are designed for flow monitoring of slightly to heavily polluted media in full or partially full pipes or open channels. The Q-Eye PSC systems use advanced “Doppler profiling technology” to directly measure velocity profiles, making them the best choice for sites with non-uniform, rapidly changing, backwatered, near zero, negative or reverse flow conditions. This technology eliminates the need for on-site calibration, thereby significantly reducing the cost of installation.