Actually, a comparator on a Blood Altar with an orb in it will output a signal proportional to the amount of LP in your soul network, as a fraction of the maximum amount of LP that particular orb could put into your network. Quite handy for monitoring your LP, and turning off your mob farm when you don't need it to run.Any way to detect the LP storage of a Blood magic alter and output a redstone signal based on it?
Tried comparators, those seem to just detect the inventory slot.
You can detect the amount of LP in the altar itself using anything that can measure fluids. Buildcraft gates and SFM can both do it. Do note that the altar actually has three tanks (input buffer, output buffer, and the one you normally see.) Gates and whatnot will only ever measure the contents of the normally-visible tank, even though they pull from the output buffer and push to the input buffer.