Quantity sensing system for a container
First Claim
1. A level sensor adapted to be connected to a monitor for measuring the quantity of an electrically conductive fluent material in a container, said sensor comprising an elongated pipe of uniform cross section throughout its length adapted to stand vertically within the container for sensing the quantity of material therein, said pipe being of electrically non-conducting material having chemically inert and low surface tension characteristics, a plurality of pairs of electrodes carried by said pipe at the outer surface thereof in vertically spaced apart relation, the electrodes of each pair being of the same vertical level, a pair of resistance members within said pipe, one electrode of each pair connected to one of said resistance members at equal vertically spaced apart points therealong, and the other electrode of each pair connected to the other of said resistance members at equal vertically spaced apart points therealong.
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Accused Products
Abstract
A level sensing system for determining the quantity of a fluent or flowable material in a container including a level sensor and a monitor wherein the sensor is constructed of a pipe of non-conducting material with pairs of electrodes exposed to the fluent material and connected to resistance bars to produce a proportionate voltage signal across the resistance of the sensor in accordance with the quantity of fluent material. The monitor transforms the signal into a readable output.
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Citations
12 Claims
- 1. A level sensor adapted to be connected to a monitor for measuring the quantity of an electrically conductive fluent material in a container, said sensor comprising an elongated pipe of uniform cross section throughout its length adapted to stand vertically within the container for sensing the quantity of material therein, said pipe being of electrically non-conducting material having chemically inert and low surface tension characteristics, a plurality of pairs of electrodes carried by said pipe at the outer surface thereof in vertically spaced apart relation, the electrodes of each pair being of the same vertical level, a pair of resistance members within said pipe, one electrode of each pair connected to one of said resistance members at equal vertically spaced apart points therealong, and the other electrode of each pair connected to the other of said resistance members at equal vertically spaced apart points therealong.
Specification