SSM AquaMax AS4L-13 Wired Sensor Security System

SSM Aquamax automatic water/ lequid level controller for domestic use for upto 1 HP pump. Pump will start at 1/4 level & will switch off at full level (before overflow) total 4 levels (25%, 50%, 75% & full tank) are there we use magnetic float switch sensor (carbon free). There is no scaling on the surface of sensors even after years.