How can we design a compact, wearable multi-gas detection device for firefighters that can simultaneously detect CO₂, methane (CH₄), hydrogen sulfide (H₂S), and VOC-based bad odours in real time?
I am working on a prototype using an ESP32-S3 microcontroller with integrated sensors (SCD41 for CO₂, TGS2611 for CH₄, electrochemical H₂S cell, and SGP40 for VOCs). The idea is to provide multi-modal alerts (buzzer, vibration, LED, OLED display) for early warnings in fire environments.
- What are the best practices for sensor calibration in such multi-gas systems?
- How can reliability and intrinsic safety (ATEX/IECEx) be ensured for deployment in hazardous zones?
- Are there alternative sensor combinations or approaches better suited for firefighter use cases?
Very good question, dear colleage, I fully agree with it!
But I believe that some invention must be made. Basically, some residual gas analyser (RGA) is the proper instrument, but due to the high vacuum system much too heavy.
As you already have some elements of the solution, give it some time and sleep over it. There will be a patent on the horizon, so no one will give the answer in public. Best wishes!
Heinrich
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