Hydor ATO sensor dimensions?

[Uwdanno]

I'm looking to buy a hydor ato for my pico tank. My rear chambers are tight and I am not sure how easily the water level sensor will fit. Does anyone with one know the dims of the level sensor??

 

[duke4130]

I would try the Tunze Nano Osmolator. The sensor is small and can fit into the small compartments in the back of the pico tanks