Two-Part pH Measuring Cell Adapter for Easy Electrode Sealing

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Solution Overview

Problem

Existing pH measuring cells face challenges such as large dead volumes leading to fluid mixing and overconsumption, difficult installation and sealing issues, frequent cleaning needs, and potential contamination during transport due to lack of sealing during transport.

Innovation Solution

A pH measuring cell with a two-part adapter system that includes a compressing element and sealing ring, allowing for easy assembly and sealing without additional clamping devices, and enabling gamma disinfection for sterilization.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a combination electrode is installed in a measuring cell, then pH measurement capability is achieved, but sealing reliability and installation difficulty become problematic

Engineering Contradiction:

Improvesealing reliabilityVSAvoidinstallation difficulty

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The adapter is divided into two separate parts: a first adapter part that forms a receiving cavity and a second adapter part that is screwed onto the combination electrode. This segmentation allows the sealing components to be distributed and pre-assembled on the electrode before insertion, making installation easier while ensuring reliable sealing through the integrated sealing ring and O-ring arrangements.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The sealing ring and O-ring are pre-mounted on the combination electrode during electrode assembly before insertion into the measuring cell. This preliminary action ensures that sealing is already prepared and will function reliably once the electrode is installed, eliminating the need for complex sealing operations during installation.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If additional clamping devices are used for sealing, then sealing reliability is improved, but device complexity and cost increase

Engineering Contradiction:

Improvesealing reliabilityVSAvoidclamping device complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The sealing function is merged into the adapter structure itself through the integration of the sealing ring and O-ring directly onto the adapter components. The first adapter part includes the sealing ring, and the second adapter part includes the O-ring, creating a combined sealing system that eliminates the need for separate clamping devices while maintaining reliable sealing through the screw connection between adapter parts.

Inventive Principle:

Principle #5Merging (Combining)

3Adaptability or versatility

If seals are not pressed in during transport, then assembly flexibility is maintained, but contamination risk increases

Engineering Contradiction:

Improveassembly flexibilityVSAvoidcontamination risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

4Loss of substance

If the measurement chamber volume is reduced, then fluid consumption is decreased, but installation space for sealing components becomes limited

Engineering Contradiction:

Improvefluid consumptionVSAvoidmeasurement chamber volume

Core Design Contradiction:

Loss of substanceVSVolume of stationary object

Solution Approach 1:

The adapter components are designed to nest around the combination electrode, with the first adapter part forming a receiving cavity that accommodates the electrode's locating section and the second adapter part screwing onto the electrode. This nested arrangement provides adequate sealing space without requiring additional chamber volume, maintaining compact measurement chamber dimensions while ensuring proper sealing.

Inventive Principle:

Principle #7Nested doll (Nesting)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The solution provides secure sealing, easy assembly, and cost-effective production, preventing contamination and reducing fluid consumption while allowing for multiple uses and sterilization.

Implementation Method 1

a compressing element (22) for compressing a sealing ring (23) of the combination electrode (20)

Methodology Applied

Scientific EffectCompression: Compression

Data Source

PatentUS12449392B2PH measuring cell

Publication Date: 2025.10.21 OPTEK DANULAT

AI summary

The present invention relates to a pH measuring cell with an adapter and a system comprising a pH measuring cell and a combination electrode.