Trimix Analyser V2

The analyser functions surprisingly well. The differences to the Divesoft analyser that uses a different technology is within the measurement error of 1%, both for the oxygen as well as the helium content.

Biggest plus for me, is that this analyser is not sensitive to noise (as the Divesoft is) I can use it in the intake of my compressor (fed by a small pump) after my Trimix-Stick and double check what is going through the compressor, not having to rely only on the two oxygen sensors of the TMX stick

Bill of Materials: TMX_Analyser__StripBoard_R03_for PCB.fzz

Housing:

• Housing
• Back cover
• TMX Sensor tube

Additional parts for gas sampling:

• Inflator Adapter_05 
  (this is a problematic part, the hole has to be very, very small, but still needs to pass gas, but only about 0.5 up to 1 L/min), You might have to change size in the Fusion model and print different size according to your printer.
• Sensor Adapter
• T-Piece
• Tube to Sensor

Parametric Box:

• Box Lid
• Box Bottom
• Box Latch 2x
• Insert Top
• Insert bottom

The circuit board was done in Fritzing

Idea & Arduino code is largely based on these two projects (adapted to my components and preferences):

https://github.com/captainigloo/Trimix-analyzer

https://www.godive-brandenburg.de/downloadse2467a8c