The reliability of the level data is based on the Sonic Intelligence echo processing algorithms. A filter discriminates between the true echo and false echoes from acoustical or electrical noises and agitator blades in motion. The ultrasonic pulse propagation time to the material and back is temperature-compensated, and converted into distance for display, analog output and relay actuation. <hr /> <li>Easy to install, program and maintain </li> <li>Accurate and reliable </li> <li>PVDF copolymer or ETFE transducers available </li> <li>Sanitary models available </li> <li>Patented Sonic Intelligence&reg; echo-processing </li> <li>Integral temperature compensation </li></span>"