- SU ultrasonic flow meters
- Get started with inline
- Performance
SU inline ultrasonic flow meter: Performance
Ultrasonic flow sensors measure flow velocity. To calculate a reliable flow rate, the sensor must also know the exact internal cross‑sectional area of the pipe. That means the geometry of the measuring section directly influences performance.
Flow rate is determined by:
- Flow velocity (v)
Determined by comparing ultrasonic signals moving with and against the flow. - Pipe cross-sectional area (A)
Defined by the internal diameter, which depends directly on wall thickness. - Flow rate
Flow rate (Q) = Velocity (v) × Area (A)
Out-of-the-box accuracy with inline technology
The SU ultrasonic flow meters consist of transducers that transmit and receive sound pulses. Medium on the opposite pipe wall diverts the direction of the transmitted pulse from one transducer to the other. A pulse is sent through the medium and the sensor measures the time of flight from one transducer to the other. Then a pulse is sent in the opposite direction. The meter measures the difference in time and calculates the flow rate.
The SU inline series features a calibrated flow tube constructed entirely of 316 stainless steel with no obstructions in the flow path. By controlling the tube specifications, including the exact outer diameter and wall thickness, we can optimize signal quality through the device and deliver reliable measurement performance with up to 2% accuracy for water right out of the box.
With a ±2% flow accuracy for water and ±5% for glycol or oil out of the box, the accuracy calculator below defines the SU inline flow meter's out of box performance.
