Fuji clampOn ultrasonic flowmeters are used for measuring liquid and gas flows in full pipes without beaking into them. In use on pipes from 13mm to 6 Metres!! Particular advantage: The clamp-on mounting of the ultrasonic sensors, so that any cutting of the pipe is unnecessary and pressure loss can be avoided. The clamp-on measurement is available either as a portable, battery run version, or as a non-withdrawable type.