The Oxygen Detector is a very useful machine. Its purpose is to detect Oxygen. When Oxygen is present, the detector sends out a redstone signal. This could be used to open doors and airlocks or turn on lights. The Oxygen Detector will send a redstone signal in all directions, except for up. The oxygen detector can glitch and emit a pulsing redstone signal.
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To craft an Oxygen Detector, you will need four Lead Ingots, two Oxygen Vents, a Machine Frame, and two Redstone.