The new Sonic-Pro® S4 from Blue-White Industries is an inline ultrasonic flowmeter featuring flow measurement technology with no moving parts, and no internal liners to wear out. The S4 Inline pipe fittings facilitate installation of the meter. The S4 is capable of measuring water flow using the Transit Time method. A low power mode permits battery operation for limited functions. The Sonic-Pro S4 Ultrasonic flowmeter is NSF 61 Certified, the housing is NEMA 4X (IP 66) for wash-down.