Sultan Sonar from Hawk Measurement America was designed to provide reliable and accurate sludge level measurement on various clarifier processes. The versatile, powerful 150 kHz transducer can measure down to the sludge bed layer or up to the light flocculent layer. It propagates a high-frequency sound pulse from a submerged transducer to the interface or bed level. Using time-of-flight calculations, the sound signal is reflected, interpreted by the transducer and sent to the transmitter. User-friendly configuration and easy calibration allow tracking of specific densities dependent on the process. The maintenance-free impact plate scum cleaner uses the surface sweeper mechanism common to most tanks to keep the sensor face clean without interrupting the measurement. A range of communication options and 3G remote support capabilities are available. 978/304-3000; www.hawkmeasure.com.