Nitrox analyzer

thingiverse

When finances are tight and you still want to show appreciation to someone for the holidays, a handmade gift is often the answer. This is exactly what we did at Divetech for our staff Christmas presents by making our own nitrox analyzers. This is a project I worked on for quite a while, and finally got around to making them, and figured I would share the files and instructions, in case you wanted to make one too. This analyzer is meant to use old rebreather O2 sensors, something we have plenty of here at Divetech. To begin, this is a DIY project. Know that making your own nitrox analyzer could be very dangerous if you do something wrong. The risk of not knowing exactly what you are breathing when you go diving could be fatal, so use at your own risk. You've been warned. Also this project is sort of intensive. You should own or have access to a good 3d printer, and be proficient in its use. Your print settings should be dialed in perfectly. You should also have experience in electronics - soldering, wiring, and programming an Arduino. Troubleshooting the Arduino in particular can be difficult sometimes, and is beyond the scope of this article. Read the fill directions here: https://www.divetech.com/post/the-20-nitrox-analyzer UPDATE 2-JAN-2021: I've added a variety of flow restrictor couplers in different diameters, to account for various sensor sizes. 9mm, 9.5mm, 10mm will fit most Vandegraph sensors. 11.5 and 12mm to fit most Analytical sensors. On each of these parts, there is a small radius 1mm from the bottom of the part. This allows to to trim a small amount of material using a razor from the overall OD of the coupler for a more precise fit. This part should be printed very slowly to account for it's small size.