Holding Tank Height

[Robokatz]

Hello all, I am considering getting Sea Level guages and see that you order by length of the sensors. I have a 2022 3231CK and of course entire bottom is covered. Does anyone know the height of my 4 holding tanks (black, grey bath, grey galley, and fresh) so I know which size to order? Hopefully I can get reply from someone with my model that has already done this, as I know tank size can vary between models.

Thanks

[Hblick48]

I have installed SeeLevel on our RV. You will probably need to cut the sensor to tank size. If sensor is shorter than the tank, mount the sensor as high as possible. I centered mine, and the SeeLevel shows 100% when the tank is 1/2 full.

[Pathfinder75]

I have a high country 353RL that is similar to your floor plan.
You should be able to see your Black and Gray tanks from your basement after removing rear wall boards. I can see tanks and both cable controled gate valves.
I did the 709-4 kit but I recall they were sending maybe 12" sensors at the time rather than the listed 9" sensors. I did have to cut mine. The sensor instructions tell you to allow clearance from top and bottom. (I believe it was 1 inch from edges. Attached photo (from bottom of tank) of sensor on my fresh water tank. All tanks use 8k wires just the sensors must be coded for location. Instructions make it easy.
I like my Seelevel sensors.