The handled Ultrasonic Flow Meter utilizes two transducers that function as both ultrasonic transmitters and receivers. The transducers are clamped on the outside of a closed pipe at a distance from each other. The transducers can be mounted in the V method in which case the ultrasound transverses the pipe twice, or W method in which case the ultrasound transverses the pipe four times, or in the Z method in which case the transducer is mounted on opposite sides of the pipe and the ultrasound transverses the pipe only once. The selection of the mounting method depends on pipe and liquid characteristics. When the flow meter works, two transducers transmit and receive the ultrasonic signal which travels firstly downstream and then travels upstream. Because ultrasound travels faster downstream than upstream, there will be a difference in time of flight (delta t). When the flow is still, the time difference (delta t) is zero.

• Easy maintenance