level sensors for auto water change and auto top off

How many level sensors do I need if I want to have profilux 4 do auto top off and auto water change ? I understand for awc there's two level sensors involved, one high and one low. Can the high sensor do double duty as auto top off level sensor ? while doing AWC can the ATO function be disabled ? How can I program this ? thanks

Hello,

Yes, you can run an AWC / ATO task using 2 sensors. The upper sensor can be doubled-up as your ATO sensor too. More information on that can be found here:
https://www.aquariumcomputer.com/kno...with-profilux/