Oxygen Collector

Collects Oxygen from the world and stores it in its internal storage tank. This machine requires power to operate. If you're using this on the Overworld, you have nothing to worry about. However, in order to get this working on planets that do not have an atmosphere, you must surround the device with leaf blocks. To get leaf blocks you must use the Vanilla Minecraft Shears item to collect them from trees. Alternatively, you could just plant trees around the device. That might work too.

Oxygen Compressor

This machine fills up your Oxygen Tanks with Oxygen. Connect this machine to a supply of Oxygen using Fluid Pipes, and connect it to a power network using Aluminum Wire. Once you have done that, insert your empty Oxygen Tanks and the Oxygen Compressor will fill them up with Oxygen.

Oxygen Decompressor

Insert your Oxygen tanks to have the Oxygen Decompressor then take the Oxygen out and into its internal storage. You can then pipe out Oxygen using Fluid Pipes. This machine requires power to function. Also used as a crafting ingredient for the Gas Liquifier.

Oxygen Bubble Distributer

Supply this machine with power and oxygen and it will begin to form a bubble of breatheable air. Keep in mind however that if it doesn't get enough of either one, the bubble will shrink and disappear.

Oxygen Storage Module

Used to store a large amount of oxygen.

Oxygen Detector

This block emits a redstone signal if it detects Oxygen.