Resonator sensors employing piezoelectric benders for fluid prop

Details Resonator sensors employing piezoelectric benders for fluid prop Resonator sensors employing piezoelectric benders for fluid prop

1996-08-28

2000-04-04

Larkin, Daniel S.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

73 32A, 73 5427, 73 5425, G01N 1116

Patent

active

060446943

ABSTRACT:
Resonator sensors namely piezoelectric benders are used for sensing fluid viscosity and density. The benders are inserted into a liquid to be monitored. An input voltage is applied to the bender causing it to vibrate in the liquid at a resonant frequency. Output voltage amplitude or frequency are monitored to determine changes in viscosity and density, respectively. The device may be used as a liquid level sensor and to control alteration of the viscosity of the fluid as, for example, by connection with a supply of ink or solvent in an ink jet printing device.

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Apparatus for sensing the level of particulate matter or liquid relative to a preselected level in a container Xerox Disclosure Journal vol. 19, No. 5, pp. 375-377, Author A. Cherian, Date Sep. 1994.

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