Electrical frequency response fluid analysis

Patent metadata

Field	Value
Publication number	US-12227433-B2
Application number	US-201615569650-A
Country	US
Kind code	B2
Filing date	Feb 19, 2016
Priority date	Feb 19, 2016
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

In the examples provided herein, a system includes an electrochemical sensor having two electrodes inserted in a fluid to be tested, where an alternative current (AC) voltage is applied across the two electrodes; an electrochemical sensor having two electrodes inserted in a fluid to be tested, wherein an alternative current (AC) voltage across the two electrodes; and a frequency response analyzer to analyze the measured the electrical response across multiple frequencies. The system also includes a memory to store a baseline of the electrical response across multiple frequencies, and a processor to determine from the stored baseline and the measured electrical response whether the electrical response is outside a predetermined range.

First claim

What is claimed is:

1. A system comprising:
an electrochemical sensor having two electrodes that, in operation, are inserted into a fluid to be tested, wherein an alternating current (AC) voltage is applied across the two electrodes;
a potentiostat that, in operation, determines a measured electrical response of the fluid across the two electrodes; and
a frequency response analyzer that, in operation, analyzes the measured electrical response determined using the two electrodes across multiple frequencies, stores a baseline electrical response across the multiple frequencies, and determines from the baseline electrical response and the measured electrical response whether the measured electrical response is outside a predetermined range.

2. The system of claim 1 , further comprising:
a processor;
a first reservoir containing a first chemical or diluting water;
a first injector controlled by the processor to automatically inject a first amount of the first chemical or diluting water into the fluid if the measured electrical response is above the predetermined range;
a second reservoir containing a second chemical or diluting water; and
a second injector controlled by the processor to automatically inject a second amount of the second chemical or diluting water into the fluid if the measured electrical response is below the predetermined range.

3. The system of claim 1 , wherein the measured electrical response and the baseline electrical response correspond to a pH of the fluid or a concentration of a specific chemical in the fluid.

4. The system of claim 3 , wherein the specific chemical includes a biocide or a corrosion inhibitor.

5. The system of claim 1 , further comprising a closed loop cooling system, wherein the fluid is in the closed loop cooling system.

6. The system of claim 1 , further comprising:
a controller to:
adjust a spacing between a first electrode and a second electrode of the two electrodes; and
adjust a depth at which the first electrode and the second electrode are inserted into the fluid to be tested.

7. The system of claim 1 , wherein the stored baseline electrical response is an impedance, a phase difference between current and voltage, or both the impedance and the phase difference between current and voltage.

Assignees

• Hewlett Packard Entpr Dev Lp

Inventors

• Cader Tahir
• Long Greg Scott
• Franz John
• Githu Gardson

Classifications

• C02F2303/08

  Corrosion inhibition · CPC title

• C02F2303/04

  Disinfection · CPC title

• C02F2209/06

  pH · CPC title

• C02F2103/023

  Water in cooling circuits · CPC title

• C02F1/66

  by neutralisation; pH adjustment (for degassing C02F1/20; using ion-exchange C02F1/42; for flocculation or precipitation of suspended impurities C02F1/52; for removing dissolved compounds C02F1/58) · CPC title