Measuring and testing – Liquid level or depth gauge
Patent
1987-09-14
1989-05-30
Shoap, Allan N.
Measuring and testing
Liquid level or depth gauge
73290R, 324 585B, G01F 2328, G01R 2706
Patent
active
048339180
ABSTRACT:
A device is provided for detecting the ullage level and flow in a vessel by detecting the presence of 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.
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Clark Billy V.
Jean Buford R.
Newton Richard W.
Warren Gary L.
CannonBear, Inc.
Payne Alton W.
Shoap Allan N.
Sroufe Delmar L.
Worth W. Morris
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