ATO float placement?

[NYC/NJREEFS]

I purchased a Tunze Osmolator ato with the magnet mounts, electronic sensor, and float sensor. I am using it on a RSM-130D and am curious where to place the sensors, "return pump section?, heater/skimmer section?" I'm not sure where to place them as to not affect the Tunze skimmer, if you can advise me please let me know.

 

[Indymann99]

ATO floats should be in the "return section" as that is the sump section that will fluctuate (drop) with evap.

 

[NYC/NJREEFS]

ATO float placement

ATO float placement

Thank you for the reply I appreciate it.