Pict. 2: 1.
Power supply
2. Control unit
3. Sensor N1 (requested water level)
4. Sensor N2
(overflow protection) 5. Refill pump 6. Sensor N3 (dry-running protection of the refill pump)
7. Refill hose for the filter tank 8. Refill hose coming from the pump 9. Filter tank
10. Refill reservoir
The sensors have to be clean, free from algae and other deposits. Since they're placed above
water, interference caused by snails or other animals is unlikely.
Pict. 3: Refill pump and dry-running protection are fixed on the bottom of the refill tank by the
suction cups.
9