Fallout Shelter – Monitor
This is a monitor for the diesel tank that fuels the generators that run the fallout shelter my father built. (For more background, click here.) The monitor was installed some years ago at the behest of the environmental quality guys in Helena. Understandably, any fuel tank (in this case a 9,000-gallon behemoth) needs monitoring. So far, there have been no leaks. As you can see, on the day this photo was taken, all functions were normal.