ATO Portable Ultrasonic Flow Meter is a handheld, non-invasive clamp-on ultrasonic flow meter designed for quick, accurate flow measurements (±1% accuracy) without cutting pipes or stopping flow. Suitable for a wide range of pipe diameters (DN40 to DN1200) and various pure liquids like water, gasoline, and oils, it delivers high repeatability with zero pressure loss. The lightweight 500g main unit features an intuitive LCD screen, a built-in data logger storing over 2,000 lines of records, and rechargeable Ni-H batteries providing over 12 hours of continuous operation. Compatible with standard and high-temperature IP67 transducers, it is an efficient, portable solution for field testing across industrial and municipal applications.