The Analog Devices AD537 voltage to frequency converter will do this DIRECTLY.
It's got some sort of temperature sensor in it. You'll have to look for the right case for your application.
You could also use a cricket, but they're not so stable.
How does one convert a temperture to frequency (CPS) is this possible TIA
> Is this possible if so what is the formula it's all emf isn't?
>
> TIA