Larry D

I don't have any experience with the ML1500, but I do have a lot of experience with level. My advice would be to use the radar detector to do the dirty work. I've used radar detectors for displaying the levels on various configurations of chemical tanks and the probe had the onboard software to figure distance or volume in the different tank orientations and was able to be set up on a non-ideal tank shape. The radar detector that I used would also temperature correct the reading if I set it up that way. The basic Siemens Probe LR will do all of these things but I'm sure that the basic radar detectors by other manufacturers will do the same.