Self cleaning cat litter box

I read in one of those cat litter sand bags that you could recycle the stuff by heating it at a very high temperature. So I thought "Hmmm, this could be useful". So, here's how the thing works. There are two different detectors. One counts the cat droppings and the other detects the level of amonia. Whenever each of these reach unacceptable levels, the cleaning system is activated. It first determines if there is any cat using the litter box. If not, then the flap door is locked and the floor collapses, letting the sand fall into a conduit that leads to a furnace. While the sand is being recycled, the floor and walls are sprayed with a solution to remove any odors. With the floor securely in place previously recycled sand is deposited in the litter box. After the recycling cicle is completed, the hot sand is transferred into a cooling area, until it replaces the current sand.