C15 no12 cab blitz: OHM range fuel senders and gauge?

[Grant Bowker]

I'm quite sure the nominal range for the fuel sender/gauge pairing for the Chev CMPs is 0-30 ohms. https://www.fillingstation.com/artic...ugetesting.htm
I'm also quite sure that the values for Ford CMPs were different as each started out using their own civilian pattern gauges and matching senders.
I'm not sure what happened when Ford went to the round gauges but believe Chevrolet kept the 0-30 range. I don't have manuals to hand to confirm this but will add more when I get the chance to check.

[odwillys]

Thanks guys I guess my confusion was that I have a collection of both Chev and Ford gauges.

Cheers Bob K

[Mike K]

From memory the civilian Ford fuel gauge system is a different concept, the sender and gauge units both have a coil surrounding a bi-metal arm and breaker contacts. With current flowing, the coil will heat up and the arm would bend and open the contacts .The gauge pointer is attached to the bi-metal arm and it will move in sync. with the sender bi-metal arm They had a capacitor fitted at the sender unit in order to reduce the spark interference to wireless sets ? . I often thought how weird it was to have a pair of sparking contacts inside a petrol tank ! The sender is a sealed unit but still , it all seems a strange way of doing things.