50-2000mm Micronics Portaflow 333 Portable Ultrasonic Clamp-On Flow Meter, With ‘B’ type transducers (50-2000mm OD), Includes 100 million point data logger which logs energy and flow, all date and time stamped, Cross correlation flow measurement system, Display shows flow rate, total flow, signal and battery level, Transducer Operating Temp: -20°C to +135°C (high temp -20°C to +200°C available), Flow Range – 0.1m/sec to 20m/sec bi-directional, Sensor cables, blocks and temp sensors: IP54 with IP68 option, Display – 64 x 240 pixels graphic display, Set-up via 16 key control panel, Battery (14 hr life) or mains operation