Can SeeLeveL RV Holding Tank Monitoring System Work on Sloped Tanks

Updated 10/12/2026 | Published 10/11/2026

Question:

Will see level sensors work on a sloped tank?

asked by: Mark G

Expert Reply:

Hey Mark, welcome back! Yes the SeeLevel sensors like what comes with the part # SE39VR do work on a sloped tank. There's actually specific instructions on how to use it with sloped tank with this kit:

The main consideration is where you mount the sensor, because a sloped bottom can affect the accuracy of the readings.

SeeLevel recommends:

- Opposite the drain valve: This is often the preferred location because it can provide a more accurate empty-tank reading.

- Near the drain valve: The sensor should be positioned slightly higher to avoid detecting the small amount of liquid that may remain at the lowest point.

- On a flat vertical section: The sensor needs good, continuous contact with the outside of the tank to operate correctly.

expert reply by: Jameson C