The S460 ultrasonic flow meter uses the proven clamp-on transit-time correlation technique. The ultrasonic transducers are simply clamped onto the outside of the pipe and never come in contact with the fluid. The transducers are connected to a controller which is available as hat rail, or portable version. The stationary models can be connected to the S330 / S331 series of displays and data loggers where the portable model is connectable to the S551.