Electrochemical process measuring device

By using pressure balance channels and sensor unit heating devices made of hydrophobic materials, the problem of evaporation loss of reference electrolyte liquid in the electrochemical process measurement device is solved, and higher measurement accuracy and longer reaction time are achieved.

CN120500623APending Publication Date: 2025-08-15HACH LANGE HACH LANGE
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Patent Information

Application Number
CN202480006842.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2023-03-22
Filing Date
2024-03-21
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

In the existing electrochemical process measurement devices, the evaporation loss of the reference electrolyte liquid is severe, resulting in a decrease in measurement accuracy and shortening of reaction time, especially in a high pressure differential environment, gas-selective membranes are susceptible to damage.

Method used

The pressure balance channel made of hydrophobic materials, combined with a gas-selective membrane and a sensor unit heating device, reduce droplet adhesion, extend the evaporation loss interval, and maintain constant conditions by controlling the temperature.

Benefits of technology

The evaporation loss of the reference electrolyte liquid is significantly reduced, the depletion interval is extended, the measurement accuracy and reaction time are improved, and the damage of the gas-selective membrane is avoided.

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Abstract

The invention relates to an electrochemical process measuring device (10) having a process sensor unit (30), the sensor unit (30) comprising a reference electrolyte tank (50) having a reference electrolyte and a reference electrode (54), and a measurement electrolyte tank (60) having a measurement electrolyte liquid (62), a measurement electrode (64), a gas selective membrane (90) separating the reference electrolyte (52) from the sample (13 '), and a pressure equalization channel (84) fluidly connecting the tank interior (56) to the atmosphere (11). The pressure equalization channel (84) is defined by an equalization channel body (80) made of a hydrophobic material having a contact angle Theta higher than 90 DEG. This allows a very narrow pressure balance channel to be achieved without the risk of clogging by electrolyte droplets, thereby significantly reducing the evaporation loss of measuring the electrolyte.
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