CROSSFLOW™ Ultrasonic Clamp-on Flow Meter
Full service high accuracy flow measurement without cutting any pipes. From installation of hardware, electronic data acquisition, system commissioning, data collection and analysis, to the final measurement report, AMAG has you covered.
The CROSSFLOW™ Ultrasonic Clamp-on Flow Meter measures any liquid’s volumetric flow rate with uncertainty as low as ±0.3%.
How it works
AMAG’s unique CROSSFLOW™ Ultrasonic Clamp-on non-intrusive flow meters operate via cross correlation, by transmitting ultrasonic signals through the piping and fluid perpendicularly to the pipe wall, at two nearby cross sections. The ultrasonic signals are modulated by the turbulent eddies in the flowing fluid in the pipe. The received signals are then cross correlated to produce a time signature corresponding to the travel time of the turbulent structures in the flow. Since the spacing between the upstream and downstream ultrasonic paths is known, the velocity of the flow can be calculated.
CROSSFLOW™ then uses additional information contained within the demodulated ultrasonic signals to assess and correct the measured flow velocity for variations caused by different upstream piping geometries and flow disturbances which may affect the flow profile. The proprietary signal processing algorithms used to do this have been developed and honed over decades of research, laboratory testing and plant flow measurements to provide accurate and repeatable results to within ±0.3%. These high accuracy results improve instrumentation accuracy and reduce uncertainty.
Cross correlation does not rely on the speed of sound, is not effected by temperature changes, or by harsh environments. We exclusively use cross correlation for all measurements, opposed to the transit time principle.
AMAG’s unique CROSSFLOW™ Ultrasonic Clamp-on non-intrusive flow meters operate via cross correlation, by transmitting ultrasonic signals through the piping and fluid perpendicularly to the pipe wall, at two nearby cross sections. The ultrasonic signals are modulated by the turbulent eddies in the flowing fluid in the pipe. The received signals are then cross correlated to produce a time signature corresponding to the travel time of the turbulent structures in the flow. Since the spacing between the upstream and downstream ultrasonic paths is known, the velocity of the flow can be calculated.
CROSSFLOW™ then uses additional information contained within the demodulated ultrasonic signals to assess and correct the measured flow velocity for variations caused by different upstream piping geometries and flow disturbances which may affect the flow profile. The proprietary signal processing algorithms used to do this have been developed and honed over decades of research, laboratory testing and plant flow measurements to provide accurate and repeatable results to within ±0.3%. These high accuracy results improve instrumentation accuracy and reduce uncertainty.
Cross correlation does not rely on the speed of sound, is not effected by temperature changes, or by harsh environments. We exclusively use cross correlation for all measurements, opposed to the transit time principle.
