I don't use my sensors. The last 2 campers I owned, they were never accurate. So the current camper, I simply ignore the sensors.
My wife and I camp alone, with our dog and 2 cats.
Our tanks are: Fresh water 43 gallon. Black, Grey, and Galley are 30 gallon. And the water heater is 6 gallons.
With our current trailer we can take 6 navy showers.
We can use the toilet for 3-4 days (depending).
We can use the kitchen sink for a week or more (as we do most of our cooking and clean up outside).
I have a blue tote (32 gallon), and I dump the black and gray every other day if I do not have full hook-ups. If I dump every other day, I can usually dump both black and gray into the 32 gallon tote and not over fill. I back-flush the gray tank into the black tank to help swish the contents out. This saves water and prevents the tote from over filling.
