The NEW Series SX1 Sensor is part of a fixed ultrasonic flow meter system based on the transit time measurement method for measuring flow rates of relatively clean homogeneous liquids. Systems are composed of a converter (Series UFX1) and a clamp-on sensor (Dwyer Series SX1 and SX2 sensors). Two ultrasonic sensors are mounted on the pipe exterior, and each transmits an ultrasonic pulse to the opposite sensor.  The difference in the transit times of the two waves is used to calculate the flow velocity. Applications include flow measurement of any fluid through which an ultrasonic signal may be transmitted, including those of unknown sound velocities. The Series SX1 Sensor is ideally suited for liquid flow measurement for pipe diameters from 0.50 to 235 inches.