SPOM, OXYGEN: 1KG/S
This is Francis John's take on the classic SPOM, modified to fit in a four-tile high area.
Atmo sensor, upper (hydrogen): above 750
Atmo sensor, lower (oxygen): above 450
Note: use gold (or better) for things can can overheat. The upper section can be fully enclosed, the hydrogen cools the top level.
A not on sources: the SPOM was first introduced to the world by QuQuasar in a post on Klei's forums. Francis John noted that the design shown here was inspired by a version he saw Cryptic Fox build.
Design by Francis John
Source: "Electrolyzer, SPOM, O2, Oxygen: Tutorial nuggets : Oxygen not included", by Francis John. Available at: https://youtu.be/6KzD2c6EQ7I?t=380, accessed 12 August, 2020
For an introduction to how the SPOM works, see: