There is Clamp On Ultrasonic Flow Meter offered by us that measures fluid flow in main applications. By using sound waves to determine the transit time of a gas or liquid, ultrasonic flow meters can accurately monitor any changes in flow, both upstream and downstream. The flow meters come in either single or dual-sensor versions. In the single-sensor version, the transmit and receive crystals are potted into the same sensor body. The Clamp On Ultrasonic Flow Meter is made for use in the various places.