A three PZT setup for determining physical liquid properties utilizing acoustic pressure waves

Sensors utilizing acoustic pressure waves are suitable for the determination of physical liquid parameters (e.g. mass density, speed of sound and viscosity). In our contribution we introduce a sensor setup based on three PZT transducers immersed in a sample fluid utilizing transient pressure waves to determine the longitudinal viscosity of the fluid. We discuss the basic sensor setup, an according 1D-model and present a prototype device and experimental data obtained with this setup.