I have 3 toilet robots 3 automatic litter boxes. Each of them has a ball that spins when the box is running. I took the boxes apart to clean them and then put them back together. Only then did I discover that there were four of these magnets in each box, just hidden in two small hollow points. Two magnets per point. The magnets tell the sensor the home position and the falling position of the ball. The magnets fell out while cleaning and I had to order replacements. REPLACEMENT ORDERS FROM THE MANUFACTURER IS NOT POSSIBLE! They are exactly the same magnets. Worked great!
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