Forgot to add that mine is a replacement sender unit running on a 12v conversion car. These have only 1 contact arm against the coil internally and not 2 as per the originals described in both articles in case anyone gets confused. Also the one I got from Renel has a ‘Q’ and tested label and a date stamped on it and is sold as suitable for 6 or 12v.
The one I also have from CTA has nothing on it (and cost more…..) so as with all aftermarket parts, the quality does vary.
David Faulkner