The SmartAerator Tornado Surface Aerator from Fluence Corporation uses controls, sensors and variable-frequency drives to significantly reduce the energy required to aerate wastewater. Its adaptive AI is designed for hydrodynamic performance in wastewater processes to provide energy savings while maintaining aeration and mixing performance during all parts of the daily diurnal cycle throughout the year. It can be sold as a retrofit kit or with new Tornado aerators. Significant energy savings can be seen, particularly with projects that require high-horsepower aerators and projects with multiple aerators. The payback period for a typical installation is approximately two years or less. 800/879-3677; www.fluencecorp.com