An acoustic sensor for simultaneous density and viscosity measurements in liquids

Abstract

Articles you may be interested inSimultaneous determination of density and viscosity of liquids based on quartz-crystal resonators covered with nanoporous alumina J. Appl. Phys. 98, 014305 (2005); 10.1063/1.1942646 Simultaneous liquid viscosity and density determination with piezoelectric unimorph cantilevers Simultaneous measurement of liquid density and viscosity using remote query magnetoelastic sensors Rev. Sci. Instrum. 71, 3822 (2000)We studied theoretically the properties of a vibrating sensor, constituted of a cylindrical tip partly immersed in a liquid. The tip is driven axially by a stepped horn and by a piezoelectric element. Equations of the fluid flow around the tip are solved and show that longitudinal and transverse waves are emitted in the fluid. This allows the device to be sensitive to the density and viscosity of the fluid. It is shown that the properties of the fluid can be deduced by measuring the frequency shift at resonance and the corresponding electric impedance. The precision of the actual device is still low for several reasons, which are discussed. Then our apparatus seems to be more convenient to in situ reaction monitoring rather than for rheological precise measurements.

Integrated Sensing and Processing Acoustic Resonance Spectrometry (ISP-ARS) for Sample Classification

“…Versatility and Flexibility of ISP-ARS ARS has previously been applied to the study of tablets [13][14], semisolids, and colloidal dispersions [15][16], liquids [17][18][19], and powders [20][21][22]. Clearly, ARS can be used for the analysis of samples in many phases.…”

Wide-range viscoelastic measurement using resonating sensors

“…In the near-fields acoustics technique using evanescent waves [1], the tip of a sensor is placed in contact with a medium. This technique has been revealed to be sensitive to the properties of liquid.…”

Simultaneous measurement of liquid density and viscosity using remote query magnetoelastic sensors

“…A common problem in almost all viscosity measurements [1][2][3][4][5][6][7] is that the extracted information depends on both the density l and the viscosity of the fluid. A ( l ) 0.5 factor is found in most of the theoretical calculations that consider viscosity measurements, [7][8][9][10][11] including those that describe the response of surface acoustic wave sensors 8-10 and magnetoelastic sensors 6,7 upon immersion in liquid.…”