Measuring Probe with Overflow Channel and Compensation Volume
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Solution Overview
Problem
Amperometric measuring probes face issues with gas bubbles in the probe interior, which can interfere with measurement precision and lead to operational failures, particularly due to the reliance on pressure relief valves that may malfunction or fail to prevent gas intrusion or electrolyte leakage.
Innovation Solution
A measuring probe design featuring a cylindrical cap-shaped housing with an overflow channel and a seal that ensures the probe interior is filled with fluid electrolyte without gas bubbles, eliminating the need for a pressure relief valve, and incorporating a gas-filled or evacuated compensation volume to manage pressure fluctuations, reducing mechanical stress on the sensor membrane.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a pressure relief valve is used to manage pressure fluctuations in the probe interior, then pressure regulation is achieved, but the valve may malfunction or fail to prevent gas intrusion or electrolyte leakage
Solution Approach 1:
The patent removes the pressure relief valve from the system entirely and replaces it with a compensation volume that passively manages pressure fluctuations through volume expansion and contraction, eliminating the reliability issues associated with active valve mechanisms
Solution Approach 2:
The compensation volume is pre-filled with gas or designed as a flexible chamber that can expand to absorb pressure increases before they affect the probe interior, providing beforehand cushioning against pressure-related harmful effects
2Measurement precision
If the probe interior is sealed to prevent gas bubble intrusion, then measurement precision is improved, but pressure fluctuations cannot be relieved
Solution Approach 1:
The probe interior is segmented into a sealed measurement chamber and a separate compensation volume, allowing the measurement chamber to remain sealed for precision while the compensation volume handles pressure fluctuations independently
Solution Approach 2:
The compensation volume acts as an intermediary between the sealed probe interior and external pressure changes, absorbing pressure fluctuations without directly affecting the sealed measurement environment
3Manufacturing precision
If an overflow channel is used to fill the probe interior with electrolyte, then gas bubbles are eliminated, but the channel must be sealed to prevent leakage
Solution Approach 1:
The overflow channel is designed to automatically seal itself once the probe interior is filled with electrolyte, using the electrolyte level itself to close the channel and prevent leakage, eliminating the need for additional seal components
Solution Approach 2:
The overflow channel performs dual functions: filling the probe interior with electrolyte and then sealing itself to prevent leakage, without requiring external intervention or additional sealing mechanisms
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 effectively prevents gas bubbles in the probe interior during manufacturing and operation, ensuring accurate measurements and preventing electrolyte leakage, while the compensation volume mitigates pressure-related stress on the sensor membrane, enhancing the probe's reliability and longevity.
Implementation Method 1
A measuring probe design featuring a cylindrical cap-shaped housing with an overflow channel and a seal that ensures the probe interior is filled with fluid electrolyte without gas bubbles
Implementation Method 2
incorporating a gas-filled or evacuated compensation volume to manage pressure fluctuations, reducing mechanical stress on the sensor membrane
Implementation Method 3
a gas-filled or evacuated compensation volume to manage pressure fluctuations, reducing mechanical stress on the sensor membrane
Data Source
AI summary
The present disclosure relates to a measuring probe for measuring a concentration of an analyte in a measuring medium represented by a measured variable, including a probe housing having a first housing part and a second housing part, the first housing part being cap shaped closed on a front end by a sensor membrane and detachably connected to the second housing part on a rear end opposite the front end, such that the second housing part closes the cap at the rear end, and the first and the second housing parts define a probe interior sealed by the sensor membrane, a fluid electroyte contained within the probe interior, an overflow channel in communication with the probe interior, and a seal adjacent the probe interior so as to seal the probe interior from the exterior of the measurement probe and simultaneously seal off the overflow channel.