Fuel sender resistances needed

[sujitroy]

I know someone here did some detailed experiments with his fuel sender and took resistance measurements. I found it once, but can't find it now. When the sender is in the full position, what is the resistance across the terminals? I have 2 Smith senders, one reads about 25 ohms the other reads 16 ohms. The one reading 25 shows a gauge reading of 2/3 full. The one reading 16 ohms, shows a reading just below F. I can't bend the full stop tab anymore.
My gauge was calibrated. the only thing left is the voltage stabilizer. (I did a controlled experiments months back with voltage stabilizers. For those of you with a full tank of fuel, does the needle read way over F?
Sujit

[marshman]

For what it's worth, I've just been doing some testing on the workshop bench. I've found the resistances that make most sense, with a 10 volt stabilised supply attached are; Empty 220 Ohms, 1/4 120 Ohms, 1/2 68 Ohms, 3/4 42 Ohms and Full 22 Ohms. I also found my resistance wire in the sender unit had slipped down from where it should be, so was causing my massive under-reading error. I guess the resistance is non-linear due to the heating requirement of the bi-metal element in the gauge, whereby current would need to square to maintain linear heating?
Just a thought.
Steve

from an old thread. Don't know if they are correct or not but look "sensible" to me.

Roger

[sujitroy]

from an old thread. Don't know if they are correct or not but look "sensible" to me.

Roger

Thanks. I'll us the sender which reads 16 ohms for now.

Sujit

[trunt]

Its an aftermarket one so take the values with a ..Mehhh

Full, 20 ohms but I got it down as far as 5 ohms by bending the tab
Empty, it went to 200ohms then about 1/4" from the stop it goes open cct.

The "fuel lamp" contact goes to 0.5 ohms AFTER the end of the resistor track - that seems wrong..