Good explanation @tmassey
I've just modified "everything" and now it reads much better. Because I'm using a static mixer which diameter is 40mm, before it I have a section of PVC pipe absorbing air through a filter and where I inject the O2. After the mixer I've added a section of 40mm PVC pipe around 60cm long so that the gas turbulences get reduces to a reasonable degree and at the very end I've set the cell using the screw-on sampling tip.... and them the pipe adaptor to 20mm and the hose to the compressor.
This configuration is much more accurate and stable and let me be very precise.
Next steps are:
1) Fix or get a proper O2 analyser
2) Find out how can I sample the post-compression mix
1) My Arduino based analyser (ESP32 actually) provides values around 2% less than post-compressor values. Not yet sure why, but probably is because I'm not using the appropriate load resistor. The good thing is that I get on it almost exact value post-compressor, which means the new stick configuration is much accurate. Next steps here are fixing the Arduino analyser, and also start using my brand new Vandagraph VN202 mkII (I've bought this one for consistency shake).
2) Tell how can I analyse post-compressor bearing in mind my Bauer PE100-TW only has an outlet hose. I guess I can use a manifold block or similar to get some additional outlet where I can connect the analyser, but I have to find one with a DIN300 input port to connect my Bauer.... In the meantime I can measure when filling double tanks
I've just modified "everything" and now it reads much better. Because I'm using a static mixer which diameter is 40mm, before it I have a section of PVC pipe absorbing air through a filter and where I inject the O2. After the mixer I've added a section of 40mm PVC pipe around 60cm long so that the gas turbulences get reduces to a reasonable degree and at the very end I've set the cell using the screw-on sampling tip.... and them the pipe adaptor to 20mm and the hose to the compressor.
This configuration is much more accurate and stable and let me be very precise.
Next steps are:
1) Fix or get a proper O2 analyser
2) Find out how can I sample the post-compression mix
1) My Arduino based analyser (ESP32 actually) provides values around 2% less than post-compressor values. Not yet sure why, but probably is because I'm not using the appropriate load resistor. The good thing is that I get on it almost exact value post-compressor, which means the new stick configuration is much accurate. Next steps here are fixing the Arduino analyser, and also start using my brand new Vandagraph VN202 mkII (I've bought this one for consistency shake).
2) Tell how can I analyse post-compressor bearing in mind my Bauer PE100-TW only has an outlet hose. I guess I can use a manifold block or similar to get some additional outlet where I can connect the analyser, but I have to find one with a DIN300 input port to connect my Bauer.... In the meantime I can measure when filling double tanks
