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The Hydro Sensor is a Automation item in Oxygen Not Included. It's purpose is to send a signal to a Liquid Pump system instructing it to turn on or off. On possible use is to refill a Wash Basin. The sensor will alert the pump when the water pressure has fallen below a chosen range.

The Hydro Sensor is in the third tier of Research in Improved Plumbing. Duplicants will need to have learned Plumbing and Filtration to unlock it.

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