Portable Ultrasonic Flowmeter Model 220 The portable device has been designed to meet the needs of Service, Maintenance and Commissioning Engineers wishing to check the flow rate of liquids at different locations in the plant. The set-up of the unit is simple and user friendly with the required flow information obtained in minutes. The ultrasonic sensors are clamped onto the outside of the pipe, thus eliminating the need to dismantle the pipework and interrupt the process. - Portable dual mode flowmeter - Easy to install clamp-on sensors with no process interruption - Non-invasive flow measurement of liquids, no pipeline disturbance, no pressure loss - Suitable for all commonly used pipe materials with pipe diameters from 6mm to 6.5m (1/4" to 256") - Integrated wall thickness measurement, 2 flow channels as standard Specification -Measuring Principle Ultrasonic time difference correlation principle and Doppler-NoiseTrek%u2122 -Flow Velocity Range 0.01 - 25 m/s -Resolution 0.25 mm/s -Repeatability 0.15% of measured value ± 0.01 m/s -Accuracy Volume Flow - ±1-3% of measured value depending on application, ± 0.5% of measured value with process calibration -low Velocity - ±0.5% of measured value -Rangeability 1/2500 -Turn down Ratio 1/100 -Measurable Liquids All acoustically conductive liquids with a gas or solid content of < 10% of volume