That is a Wema meter now
KUS. The older models, like the one I had, was a Float problem.
The coating on the Float failed slowly and it soaked up Diesel and stop "floating" on the diesel fuel level.
This was fixed with the new design sold here at
Hunter Tank Monitors
Most likely the USA standard, when Tank is really empty, you have a LIVE Zero.
Or this...
- American Standard 240-33 ohms (240 ohms at empty, 33 ohms at full)
- European Standard 0-180 ohms (0 ohms at empty, 180 ohms at full)
Thus 240 ohms when tank is empty.
Jim...