100-4 Fuel Gauge

[martx-5]

Hi, I normally hang around the Triumph forum, but have a question concerning a fuel gauge I had in my TR3...see pic below. I've since replaced it with a proper TR3 gauge. The Triumph guys said that it came from a 100-4. It never worked right in my TR3, despite trying to calibrate it. The TR3s use a 0-90 ohm sending unit. What I'd like to know, is what in the ohm range for the 100-4 fuel sender.

Also, what is one of these worth in good working order?

 

[Keoke]

what is one of these worth in good working order?--

-Well martx5:
I really can not say since I have never seen one in that condition.Most of em been bouncing around so one can't tell if they are are good or bad. :laugh:

There are some inteligent people on here that know the answer to your problem hang on--Keoke--AZ :cowboy:

 

[tahoe healey]

There are some numbers hidden by the angle of your photo that might tell if it is in fact for a 100-4.
At a British car show last weekend there were about 20 of those of about 15 to 20 bucks.

 

[martx-5]

There are some numbers hidden by the angle of your photo that might tell if it is in fact for a 100-4...

X.49422/219

And this thing works, but I just need to know the ohm range of the sender so I can fine tune the calibration, as I messed with it for use in the TR3.

 

[glemon]

I don't have a direct answer to your question, but so the MG guys don't feel left out of this AH/TR discussion, there is very good information I used to calibrate my AH 100 guage on the MGAGURU website: https://mgaguru.com/mgtech/electric/fg_01.htm