Sensor and method for ullage level and flow detection

Details Sensor and method for ullage level and flow detection Sensor and method for ullage level and flow detection

G - Physics

01

F

343/2, 343/38

G01F 23/28 (2006.01) G01F 23/284 (2006.01)

Patent

CA 1288151

SENSOR AND METHOD FOR ULLAGE LEVEL AND FLOW DETECTION ABSTRACT OF THE DISCLOSURE A device is provided for detecting the ullage level and flow in a vessel by detecting the presence or a solid or liquid material in proximity to a microwave detector. The device may be mounted to the side of the vessel or suspended inside the vessel so as to bring the microwave sensor into proximity with the surface of the contents of the vessel. A microwave bridge circuit may be used to detect a change in either the amplitude or phase of a signal reflected by the material within the vessel compared to a reference signal tuned to either the presence or absence of the anticipated solid or liquid material. In one embodiment, the reflected material signal is compared to the signal from a sample chamber containing the material to be detected. The device can reliably detect the level of multiple interfaces for various materials having distinct electric or magnetic properties.

546957

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