Temperature controlled switch - Extreme TEMPS

[Opusss]

Hi,
I need a temperature controlled switch/relay that will active at a given temperature. I need a really basic circuit.
The big problem is that I need the switch to activate at temperatures of -15/-20 degC. so the range must be from -30 to +30degC.
Anyone has ever worked on something similar ?
Thanks !

 

[mneary]

-30 to +30 degC are not extreme temps. See the app notes for LM35 and similar devices.

 

[Opusss]

Yeah.. you're right.. but most "off the shelves" controllers don't cover under 0degC...
Maybe "awkward" temps would've applied more...

I've seen the LM35 in other posts... I'll take a closer look at it.. Thanks !!