Gas analysis system design issue

In summary, Tonio is a newbie in a design field and is working on a gas analysis system. They are facing a mechanical design issue as the gas sensors they have chosen come in SMD packages and they need a rectangular gas chamber. They are wondering how to ensure gas tightness with this shape and are seeking alternative solutions to using O-Rings. They have found helpful resources from Parker about using O-Rings in non-circular groove patterns.
  • #1
alchemist_eng
Hi all,

maybe this is a silly question but I am a newbie in this particular design field. I'm working on a gas analysis system and I'm facing a mechanical design issue. The overall system is made of the electronic board (PCB) with a gas sensors array plus the signal conditioning electronics, a gas chamber on the sensing area and various pneumatic tubes/fittings. The sensors we have choosen are sold with SMD (surface mount) packages so we need a gas chamber that "sits" on the PCB surface (see https://ibb.co/kJtuzF).

Usually gas chambers are circular based in order to include an O-Ring in order to ensure gas tightness but in this case, for design related issues, we need a rectangular based gas chamber. How we can ensure gas tightness with this kind of mechanical geometry? Are there alternative ways than using O-Rings?
Tonio
 
Engineering news on Phys.org

1. What is the purpose of a gas analysis system design?

The purpose of a gas analysis system design is to accurately measure and monitor the composition of gases in a given environment. This can be used for various applications such as air quality control, industrial process monitoring, and environmental research.

2. What factors should be considered when designing a gas analysis system?

When designing a gas analysis system, factors such as the type of gases being measured, the required detection limits, the sampling method, and the environment in which the system will be used should all be taken into consideration. Other important factors include the accuracy and precision of the measurement, the cost and maintenance of the equipment, and any regulatory requirements.

3. What are the main components of a gas analysis system?

The main components of a gas analysis system include a gas sampling mechanism, a gas analyzer, and a data acquisition and processing unit. The gas sampling mechanism can vary depending on the application, but typically involves a pump or valve system to collect and transport the gas sample to the analyzer. The gas analyzer is the main instrument that detects and measures the gases present in the sample. The data acquisition and processing unit receives the measurements from the analyzer and converts them into usable data for analysis and interpretation.

4. How can the accuracy of a gas analysis system be ensured?

The accuracy of a gas analysis system can be ensured through regular calibration and maintenance of the equipment. This involves comparing the measurements from the system to known standard gases and adjusting the system accordingly. It is also important to follow proper sampling procedures and use high-quality equipment to minimize potential errors.

5. Are there any safety precautions to consider when using a gas analysis system?

Yes, there are several safety precautions to consider when using a gas analysis system. First, it is important to handle any gas samples or cylinders with caution and follow proper storage and disposal procedures. The system should also be operated in a well-ventilated area to prevent exposure to potentially harmful gases. Regular maintenance and inspection of the system can also help to ensure safe operation.

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