SS tank level monitor ?

[Boomer]

Thanks Wayne.  I found a sensor at Tech Edge that is a sealed submergable plastic pipe type.  Comes in from the top and is a sealed unit. They say it sticks out of the tank about 1/2" and I may not have that much room, my tanks are stacked and up tight to the top of the bay.  Your idea might work better with stick on sensors.

[luvrbus]

I have stick on sensors from Silverleaf on my plastic tanks they work some times ,one is bad now and Martin is out of stock and has been for a frignn year

[Jim Blackwood]

There are a lot of sensors available that will do the job. For instance, if you search "proximity sensor water" for instance you will see a bunch of thirty dollar units that can be attached to a stand pipe or a flat wall and will drive an indicator light directly, available in 12 and 24v versions. These can be glued on.

This is just one example of a great many. Alibaba has a sensor that costs about 3-5 bucks with a 10 unit minimum order, with those you need a low voltage source but a dropping resistor or a solid state regulator gets that job done for a buck or two. For a control panel, some LED lights and a power switch are all that's needed. It's not something that you have to spend serious money on to have the equal of the best units out there. How often do you have to check anyway? Rarely. Once you get used to your system and your usage, almost never. So it doesn't need to have all this bluetooth and wireless and phone app business going on. Sometimes the simplest solution is the best, after all if the weather rope is wet it generally means it is or has rained recently. So if you have translucent tanks and/or a clear standpipe lifting the bay hatch can tell you all you need to know. For a blackwater tank that standpipe might need to be a 2 incher so it stays readable but then it only has two failure modes. It can leak, or it can get enough of a buildup on the inside that you can't see the level but both are fixable. Usually a larger diameter will be readable longer between cleanings.

Jim