Triangular Sealed Gas Detector for Moisture Management
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Solution Overview
Problem
Existing gas detectors for hostile environments, such as wastewater infrastructures, suffer from rapid sensor decay and moisture uptake due to harsh conditions, leading to sensor leakage and data loss.
Innovation Solution
A portable long-term gas detection and monitoring apparatus featuring sealed gas sensors, temperature and humidity sensors, a data processor, and a communication device, housed in a triangular case with a transparent side for viewing, which calculates and displays moisture uptake levels and rates, and allows for wireless data transfer and calibration, preventing sensor exposure to excessive humidity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gas sensors are exposed to ambient atmosphere in hostile environments, then gas detection capability is maintained, but sensor decay and moisture uptake increase rapidly
Solution Approach 1:
The device is divided into two separate sealed environments: an internal sealed atmosphere for the gas sensors and an external sealed atmosphere for humidity/temperature sensors. This segmentation isolates the gas sensors from harmful ambient humidity while maintaining their detection capability through controlled atmospheric exposure.
Solution Approach 2:
A sealed membrane or barrier acts as an intermediary between the gas sensors and the ambient atmosphere. This intermediary allows gas molecules to pass through for detection while blocking moisture and corrosive substances, thereby extending sensor operational life without compromising detection reliability.
2Duration of action of moving object
If sensors are sealed to prevent moisture uptake, then sensor decay is reduced, but gas detection capability may be compromised
Solution Approach 1:
Different sealing qualities are applied to different sensor types based on their specific requirements. Gas sensors receive a sealed environment with selective permeability to gases, while humidity/temperature sensors are sealed to exclude all atmospheric components. This localized quality optimization maintains detection accuracy while extending operational life.
Solution Approach 2:
The gas sensors are placed in a sealed internal atmosphere that is inert or controlled in composition. This inert environment protects the sensors from corrosive ambient substances while allowing gas detection to proceed through controlled pathways, thereby maintaining detection reliability without moisture-related decay.
3Measurement precision
If multiple sensors are exposed to ambient atmosphere for comprehensive monitoring, then monitoring accuracy improves, but moisture uptake and data loss increase
Solution Approach 1:
The monitoring system is segmented into separate sealed compartments: one for gas sensors exposed to controlled internal atmosphere and another for environmental sensors exposed to ambient atmosphere. This segmentation allows comprehensive monitoring of both gas composition and environmental conditions while preventing moisture-related data loss in the gas sensing channel.
Solution Approach 2:
Sealed membranes serve as intermediaries that allow selective measurement. Gas molecules can pass through to reach gas sensors, while moisture is blocked. This intermediary structure enables accurate gas monitoring without the data loss and sensor degradation that would result from direct ambient exposure to multiple sensors.
Data Source
AI summary
A long term portable gas detecting and monitoring apparatus includes a case having a continuous sidewall including a first end closed by a first end cap, and a second end closed by a second end cap connected sealably and removably to the continuous sidewall. The continuous sidewall is triangular between the closed end and the open having three sides and three corners, two of the three sides being straight and equal in length, one of the three sides being rounded, and each of the three corners being rounded. A long term gas detection and monitoring unit mounted in the case includes gas, and temperature and humidity sensors in communication with an ambient atmosphere outside the case, a data processor operatively connected to the sensors, data storage, an information display viewable through the case, and a calibration unit for calibrating the gas sensor to a predetermined gas concentration measured by the gas sensors.