2017-06-26, 01:04 PM
Hi,
the capacitance idea is cool and it's a none intrusive method. It does not work with aluminium or steel, but most tanks for water are polypropylen or fiberglass.
Do you have a link to a chipset or module that transform capacitance like this to a voltage or a digital number ? Making this would take a few components with a fair amount of calibration. Buying a module would be nice. A continuous measurement is always the best, a 10 bit ADC would be adequate.
For grey and black-water tanks (commonly of metal) I would go a long way to have something none intrusive that could measure on the outside. I have seen floats inside perforates tubes but they too tend to clog up.
Not to mention fuel, which I am not sure if the inductive sensors would work with, I'll do a test soon. I need to figure out something smart, I have seen a it done using a radioactive source and a detector. Quite safe as the source are weak, but a lot of electronics which is either expensive or tedious to build, test and calibrate. Maybe a float is good enough for fuel.
Ole
the capacitance idea is cool and it's a none intrusive method. It does not work with aluminium or steel, but most tanks for water are polypropylen or fiberglass.
Do you have a link to a chipset or module that transform capacitance like this to a voltage or a digital number ? Making this would take a few components with a fair amount of calibration. Buying a module would be nice. A continuous measurement is always the best, a 10 bit ADC would be adequate.
For grey and black-water tanks (commonly of metal) I would go a long way to have something none intrusive that could measure on the outside. I have seen floats inside perforates tubes but they too tend to clog up.
Not to mention fuel, which I am not sure if the inductive sensors would work with, I'll do a test soon. I need to figure out something smart, I have seen a it done using a radioactive source and a detector. Quite safe as the source are weak, but a lot of electronics which is either expensive or tedious to build, test and calibrate. Maybe a float is good enough for fuel.
Ole
Ole W. Saastad
web : https://www.homelinux.no https://algol.homelinux.no
https://github.com/olewsaa/Yacht-computer
twitter : olewsaa
web : https://www.homelinux.no https://algol.homelinux.no
https://github.com/olewsaa/Yacht-computer
twitter : olewsaa