Makers, DIY enthusiasts; I know this isn't your typical "consumer level" maker stuff, but some of you might see a use.
Are you looking to control an electrical circuit through temperature sensing in a non-digital way, strictly mechanical way?
The devices featured in this post can control any electrical circuit via temperature sensing. You could even get this to work with an Arduino, or Raspberry Pi.
These items are 27.50(USD), manufactured in the US (Bristol, CT), and can be purchased online right now.
The site www.BilbeeControls.com
offers these, and they come in all temperature settings.
They even have units you set yourself to your own specifications if you don't know them at the time of purchase. Ideal for prototyping and tinkering.
They are classified as surface mounted conduction type thermostats, and there are two styles; Fixed setting (not adjustable), and Adjustable.
Here's some pics of them, but on the website you can download CAD drawings if you need specific sizes.