♦ 50-hour battery (rechargeable), 4.3'' color LCD multi-line display all integrated into a rugged, watertight enclosure. ♦ Data logger function. ♦ The heat measurement function by configuring with paired temperature sensors. ♦ Non-invasive transducers. ♦ Wide bi-directional flow range of 0.01 m/s to 12 m/s. Wide liquid temperature range: -35℃~200℃. ♦ Works reliably in both clean and somewhat dirty liquids with turbidity<10000ppm. ♦ Lightweight and easily transportable in box.