Near Intersection of I-35 & I-90 Southern Mn. | Sounds like a workable plan without any electronics.
After thinking about my experiment with crop oil in the sight gauge tubing and its inaccurate reading due to the differences in densities, I may try the idea again.
I would repeat what I did last time which was to use sight gauge tubing some what more than twice as long as needed. The excess would be coiled up on the floor of the truck bed under the tank. I would pour crop oil in the top of the sight gauge tubing. It should go down by gravity and eventually fill the tubing on the floor and start to show up at the bottom of the sight gauge on the tank. At this point, I would stop adding crop oil. This should mean that the product in the tank would push against the crop oil in the sight tubing and push it upward. Maybe I would need to use some other product other than crop oil. The idea being that this should prevent the inside of the sight gauge tubing from getting cloudy since the visible portion would not be exposed to the product in the tank.
The level shown on the sight gauge would not be level with the product level in the tank due to the differences in density. However the level should be a relative indicator of the level of the product in the tank. Rather than eyeball the level in the sight gauge against the tank markings, I would make my own set of markings.
I would then start to fill my empty tanker but stop at 500 gallons of product. I could do this quite easily since I have an electric transfer pump in my mixing shed that I use to mix batches. Once I had filled 500 gallons, I could stop and make a mark and number beside the level in the sight gauge. A white paint marker should show on my black tank. I could repeat the process with another 500 gallons etc. That set of markings and numbers should be reasonably accurate for that product.
We use the tanker for fertilizer at times. I could repeat the process with fertilizer and make a separate set of marks on the other side of the tubing. I would then consult which ever set pertained to the product I was working with.
This may not be terribly accurate but would likely be "good enough" for our purposes.
Edited by tedbear 1/11/2026 09:58
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Accu-Volume on tender tanker
