# US 11,079,348 B2 · Water sensor for detecting water in gas oil filters

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- Number: US 11,079,348 B2
- Document ID: US11079348B2
- Status: Granted
- Kind: B2
- Application number: 16/497,652
- Filed: 2018-03-27
- Published: 2020-08-27
- Granted: 2021-08-03
- Earliest claimed: 2017-03-30
- Assignees: Cebi Electromechanical Components Spain, S.A.
- Applicants: Cebi Electromechanical Components Spain, S.A.
- Inventors: Jose Luis Landatxe Zugarramurdi; Sergio Diez Garcia; Javier Garcia Izaguirre; Jorge Machin Mindan; Enrique Breton Cristobal
- Web page: https://patentgrep.com/patent/US11079348B2

## CPC

- G01N 27/223: {for determining moisture content, e.g. humidity (rain detectors on vehicle windows B60S1/0825)}
- B01D 17/12: Auxiliary equipment particularly adapted for use with liquid-separating apparatus, e.g. control circuits
- B01D 36/005: {Liquid level sensing means, e.g. for water in gasoil-filters}
- G01F 23/265: {for discrete levels}
- G01N 27/228: {Circuits therefor (measuring capacitance per se G01R27/26)}
- G01N 33/2847: {Water in oils}
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28)
- G01F: MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME

## Abstract

A water sensor for detecting water in gas oil filters having a first and a second electrode a first and a second earth connection for earthing the first electrode and the second electrode; a first switch arranged in the first earth connection; a second switch arranged in the second earth connection; a first and a second current connection for injecting a first current into the first electrode and a second current into the second electrode; and a current-generating circuit connected to the first electrode and to the second electrode through the first current connection and the second current connection respectively, and designed to inject the first current into the first electrode and the second current into the second electrode, the first current and the second current being the same.

## Claims

### Claim 1

A water sensor for detecting water in gas oil filters, comprising:
a first electrode and a second electrode;
a first earth connection for earthing the first electrode;
a second earth connection for earthing the second electrode;
a first switch arranged in the first earth connection;
a second switch arranged in the second earth connection;
a first current connection for injecting a first current into the first electrode;
a second current connection for injecting a second current into the second electrode; and
a current-generating circuit connected to the first electrode and to the second electrode through the first current connection and the second current connection respectively;
wherein the current-generating circuit is designed to inject the first current into the first electrode and the second current into the second electrode, the first current and the second current being the same.

### Claim 2 (depends on 1)

The water sensor according to claim 1, wherein the current-generating circuit is a current mirror.

### Claim 3 (depends on 1)

The water sensor according to claim 1, further comprising a controller designed to act alternately on the first switch and the second switch such that the earth connection of the first electrode and the second electrode is alternated.