electonric/gauge questions

[mpg9999]

I want to build some warning lights for my oil temp and oil pressure. The sending units work as a variable resistor. I have the ohm range of the senders. I am trying to find a device that will basically act like a relay, but based on resistance instead. Anyone have any idea if they make something like that? If not, how would I wire up some warning lights?

[.RJ]

i know autometer sells these....

why not just get real gauges instead?

[mpg9999]

i know autometer sells these....

why not just get real gauges instead?

I have real gauges, I want warning lights.

[mpg9999]

Those are my gauges.

[.RJ]

Ah, interesting.

I'm sure someone that knows electronics could rig something up pretty easily....