Branched-Channel Sensing Assembly for Stable Reference Potential
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Solution Overview
Problem
Traditional reference electrodes are complex to integrate into smaller sensing assemblies, incompatible with dried-state storage, and not suited for miniaturization, particularly in in-line sensing systems requiring stable potential for accurate measurements.
Innovation Solution
A sensing assembly with a primary fluid channel and a secondary fluid channel branching off to house a reference electrode element, limiting fluid sample flow to the electrode, allowing for a stable reference potential while enabling miniaturization and durable operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional reference electrode is used, then stable reference potential is achieved, but device complexity increases and miniaturization becomes difficult
Solution Approach 1:
The reference electrode is segmented into separate functional components: a reference electrode element and a reference electrolyte reservoir, connected through a fluid communication path. This segmentation allows each component to be optimized independently and simplifies integration into compact sensing assemblies.
Solution Approach 2:
The reference electrode element is nested within the reference electrolyte reservoir, with the element positioned to extend into the reservoir. This nested configuration maximizes space utilization and enables miniaturization while maintaining stable reference potential through adequate electrolyte contact.
2Reliability
If a traditional reference electrode with liquid-junction and frit is used, then reference potential stability is maintained, but integration into smaller sensing assemblies becomes complex
Solution Approach 1:
The complex liquid-junction and frit structures are extracted and replaced with a simplified open fluid communication path. The reference electrolyte reservoir directly communicates with the measurement chamber through defined flow paths, eliminating the need for frits and complex junctions while maintaining reference stability.
Solution Approach 2:
The reference electrolyte concentration is optimized locally in the reservoir to provide stable reference potential, while the fluid communication path is designed to minimize contamination. This local optimization allows simple overall structure with targeted functional performance.
3Productivity
If reference electrode is exposed to continuous fluid sample flow, then measurement functionality is maintained, but electrode deterioration increases
Solution Approach 1:
A reference electrolyte is introduced as an intermediary substance between the fluid sample and the reference electrode element. The electrolyte acts as a mediator that provides stable ionic contact for reference potential while protecting the electrode element from direct exposure to potentially damaging sample constituents.
Solution Approach 2:
The reference electrode element is extracted from direct contact with the fluid sample and positioned within the reference electrolyte reservoir. This spatial separation removes the electrode from harmful sample exposure while maintaining measurement functionality through the electrolyte-mediated electrical connection.
4Duration of action of stationary object
If reference electrode is placed in dried state for storage, then shelf life is extended, but reference potential stability may be compromised
Solution Approach 1:
The reference electrode element is pre-positioned within the reference electrolyte reservoir during manufacturing, establishing the correct spatial relationship and electrolyte contact before storage or use. This preliminary configuration ensures that upon activation, the electrode immediately assumes its proper functional state for stable reference potential.
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 configuration provides a stable reference potential, reduces electrode deterioration, and enables miniaturization, making it suitable for in-line sensing systems with prolonged operation and efficient manufacturing.
Implementation Method 1
a reference electrode element provided in the secondary fluid channel
Implementation Method 2
at least one working electrode provided in the primary fluid channel configured to sense a property of a fluid sample
Data Source
AI summary
The present disclosure provides a sensing assembly for sensing a property of a fluid sample comprising at least one working electrode provided in the primary fluid channel configured to sense a property of a fluid sample in the primary fluid channel; a secondary fluid channel adjacent to and fluidly connected to the primary fluid channel along the primary flow path; and a reference electrode element provided in the secondary fluid channel. The secondary fluid channel is arranged as a branch from the primary fluid channel so as to limit the flow of fluid sample from the primary fluid channel to the reference electrode element. Alternatively or additionally, a method comprises determining a property of a sample comprising providing such a sensing assembly.