From Starbounder - Starbound Wiki
Pump Sign is an object unobtainable by players through normal means. This item's information is present in the game files, but not intended by developers to be in players' possession.
It toggles between 'Pump Online' and 'Pump Offline'.
|Apex :||This sign will indicate whether the pump is on or off.|
|Avian :||A simplistic electronic.|
|Floran :||Sssign tells Floran if pump is working.|
|Glitch :||Content. This low power sign has two states.|
|Human :||A very useful sign.|
|Hylotl :||A soft glowing sign.|
|Novakid :||Useful for checkin' if the pump is operatin'.|