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The paper presents design of a Virtual Instrument (VI) for ultrasonic velocity measurements in liquids and liquid mixturesat frequencies from 1 to10 MHz. Hardware circuit designed in the laboratory with indigenous components is interfaced to PC using PCL-812 DAQ Card. Software is developed using Visual Basic. The liquid cell is designed in the laboratory and providesvariable distance between ultrasonic transducer and reflector that can be adjusted with an accuracy of ±0.01mm. This feature helps to carry out ultrasonic velocity and attenuation measurements in differential mode for increased accuracy. Ultrasonic transducers can be easily attached to liquid cell to carry out measurements at different frequencies.
Ultrasonic, Virtual instrumentation, Attenuation, Velocity, DAQ