LEFM® flow systems use a multiple path transit time method to measure fluid velocities at key locations in a measurement section.  This allows for precise calculation of the mean fluid velocity by integration of the individual path velocity measurements.  This technology was developed specifically for measurement in larger pipes and open channels.

CaldonHydro™ LEFM systems have been installed in over 500 facilities around the world, and have been used in hydroelectric penstocks and large water delivery pipelines and canals since 1971.

CaldonHydro systems consist of LEFM ultrasonic transducers, cables, mounting hardware, and an electronic processing unit.  CaldonHydro systems can be configured to meet any application requirement, including buried pipe with internal access only, exposed pipe, or open channel or rectangular bay measurement.

CaldonHydro flow systems use four parallel ultrasonic paths, or eight paths (four parallel paths in two planes).  Ultrasonic transducers may be externally mounted, internally mounted or mounted through the pipe wall.

This method does not require a comparison calibration to achieve and maintain accuracy of ±0.5% or better since the multiple path technique achieves high performance by precision placement of the sensors and an accurate pipe survey.  CaldonHydro systems are particularly suited to applications where in situ calibration is impractical, such as hydroelectric penstocks, large water delivery pipelines and open channels.  CaldonHydro systems can be used in pipes up to 60 feet (18 meters) in diameter and channels up to 200 feet (60 meters) in width.

Virtually all penstock and large pipe applications present unique configuration and installation challenges.  Caldon in-house and contract engineers are available to provide a full range of turn-key services.

For more information on the CaldonHydro systems, please call: 724.273.9300

Questions or comments?  Contact us!