In article ,
Dan S. MacAbre wrote:
If it's an old car, I'd guess it was something mechanical, like a switch
with a diaphragm, or a float, or something. I'm surprised you didn't
ask in uk.rec.cars.maintenance - I'm sure I've seen you in there before,
and it's not completely dead.

Sadly not something as simple as a float. As I said, I dunno just how it
works.

Reason I'm asking here is perhaps a fluid sensor from something like an
oil tank for central heating? Or whatever?

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Dave Plowman London SW
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