Sensors based on bulk quartz resonators are being developed to monitor fluid properties such as density and viscosity and to act as in situ chemical sensors for liquids. The device is electrically excited into a shear mode of vibration that probes the mechanical properties of a contacting fluid. The small, rugged device can be operated inside engines or pipelines to monitor properties of critical fluids such as lubricants.
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| Quartz Resonator |
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