Measuring and testing – Liquid level or depth gauge – Immersible electrode type
Reexamination Certificate
2006-10-20
2010-10-19
Williams, Hezron (Department: 2856)
Measuring and testing
Liquid level or depth gauge
Immersible electrode type
Reexamination Certificate
active
07814788
ABSTRACT:
An apparatus and method for determining the level of liquid in a container in an analytical instrument, typically an automated analytical instrument in a laboratory. The apparatus comprises:(a) an electrically conductive support;(b) an electrically conductive platform rising up from said electrically conductive support, said platform capable of supporting at least one container that is capable of containing a liquid, said platform having an area less than that of the electrically conductive support;(c) an electrically conductive element, such as, for example, the electrically conductive tip of a probe, the distance between the electrically conductive platform and the electrically conductive element capable of being reduced or increased by relative movement between the electrically conductive element and the electrically conductive platform; and(d) a capacitance sensor coupled to the electrically conductive element (c) and arranged to provide an electrical signal representing the capacitance.
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Kirk Othmer Encyclopedia of Chemical Technology, Fourth Edition, vol. 15 (John Wiley & Sons, Inc.:1995) pp. 409-434.
Halaka Folim G.
Kukla Ronald E.
Safar Scott G.
Abbott Laboratories Inc.
Devito Alex
Weinstein David L.
Williams Hezron
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