The ADC, Acoustic Digital Current meter, measures point velocity and automatically calculates discharge based on ISO and USGS standards. The ADC can be used in a wide range of measurement sites, including natural streams, rivers, open channels, and at weirs or flumes. The collected data is available for viewing on the graphical handheld display or on a PC with use of the QReview software.

The ADC sensor and handheld display attach to common wading rods, for example a top setting wading rod. Velocity measurements can be conducted in shallow water or deep water from a bridge. The vertical position of the ADC sensor is measured by a built-in-depth sensor and illustrated on the graphical display. The display indicates vertical adjustments of the sensor, up or down, based on the user selected velocity method.

The ADC uses the latest acoustic measurement principles to provide accurate and reliable velocity measurements. The ADC probe emits an ultrasonic burst consisting of 30 single pings. Suspended particles in the water column reflect the pings and an echo image is returned to and recorded in the ADC. A second set of pings is emitted and the returned echo image is compared against the first image. Cross correlation identifies image similarities and rejects differences to obtain a single image with a time shift. The time shift is used to calculate velocity.

Users' Benefits:

• Simple: easy setup with graphical display
• Flexible: attaches to common wading rods
• Performance: for use in a wide range of measuring sites:
• Natural streams, creeks, rivers, and open channels
• Irrigation canals and channels
• At weirs and flumes

• Advantage: designed for use in negative velocities and deep water
• Time Saver: the integrated depth sensor reduces manual sensor position calculations
• Functional: QReview software facilitates data download, post processing, analysis and data export

Additional Features:

• Accurate: acoustic measurement principle provides accurate and reliable velocity measurements
• Versatile: features automatic discharge calculations based internationally recognized ISO and USGS standards
• Environment Friendly: rechargeable batteries provide more than 20 hours of continuous operation
• Capacity: 4 MB of memory storage
• Options: three cable length options: 2.5 m, 6 m or 10m

Product Data:

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