Madison Company's microprocessor-based U44xx family of ultrasonic sensors offers simple local or remote programming via USB or RS-232 interface software. These sensors are designed for non-contact level, presence/absence, volume, proximity and distance measurements. The self-contained U4466 series is supplied with hassle-free set-up software and user-selectable options that allow for a variety of easy application interface considerations. The loop-powered U4467 series was specifically designed for measuring volume and open-channel flow of liquids. These low-powered sensors are suitable for hazardous locations when used with an approved barrier.