What is this?

[cba191]

I bought a used system and it came with this. It has an osmolator and a varios 6 pump. But i cant find anything with that connector.

 

[TX_REEF]

it looks like a float switch, I assume that's the plug that connects it to the ATO controller

 

[cba191]

it looks like a float switch, I assume that's the plug that connects it to the ATO controller

it is a float, but the ato doesn't have a corresponding plug.