A question regarding the detection method of vortex flow meters
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Vortex flowmeters can be classified by their detection method into thermal type, stress type, capacitive type, strain type, ultrasonic type, vibrating-body type, fiber-optic type, photoelectric type, etc. What is the detection method used in the Rosemount 8800D vortex flowmeter?
The vortex flow sensors from Rosemount, Yokogawa, and ABB are piezoelectric, while those from E+H are differential capacitive. The principle of piezoelectricity is that when vortices are generated on either side, a transverse alternating lift force perpendicular to the direction of fluid flow is produced simultaneously. This force acts on both sides of the sensing probe, causing the piezoelectric crystal to deform and generating an alternating charge signal with the same frequency as the vortex frequency. However, Rosemount has a removable structure; unlike Yokogawa and ABB, it should also belong to the stress-type category.
The Rosemount 8800D is piezoelectric, with high-resolution images of the impulse response.
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