Patent ID: 7578172
Filing Date: 2009-08-25
Classification: G01N

Abstract:
1. A symmetrical viscosity sensor, comprising: a coupling shaft comprising a first end, a second end, and a center portion; a first torsion oscillator coupled to the first end of the coupling shaft; a second torsion oscillator coupled to the second end of the coupling shaft; at least one insulator coupled to the center portion of the coupling shaft; at least one first oscillation means between the first torsion oscillator and the insulator; at least one second oscillation means between the second torsion oscillator and the insulator; a signal transmission/reception line for transmitting and receiving a driving and detection signal of the first and second oscillation means; and a control unit for controlling the driving and detection signal via the signal transmission/reception line, wherein the first and second torsion oscillators are geometrically symmetric and configured to be immersed in a fluid.