My RV has tank level sensors. 4 pins installed on tank. Each has a resistor connected to it. (except for common)
the bottom 2 pins are at same level. The current system uses 12vdc and it will read 8 vdc when they are both wet. The next pin up is 2/3 level and drop to 6vdc, and 4th pin drops to 4vdc.
So if I remove power and just use the resistances. I should be able to get some reading either NA standard or EU?
the bottom 2 pins have a 0 ohm value when jumped. @ 1/3 level
the next has a 68 ohm valve when jumped to common.
top sensor pin is 188ohm when jumped to common.
I believe this should give 256 ohm when full. and 0 when 1/3 or just slightly off 0 ohm.
I've seen many ppl ask about camper style tank sensors and I think this is what most are referring to. There is no way I can get to my tanks to install float style sensors. And if its any more than building a resistor pack to change the values. I would just stay with the original KIB Tank Monitor system.
It sure would be nice to have it all in the same display.
(Currently have venus/multiplus/bmv-712/mppt 100/50- venus is temporary until cerbo arrives in Canada in August from what I'm told)