Thermal Sensors for Extreme Environmental Conditions

Using the internet, find a thermal sensor for operation in some type of extreme environmental condition. You can do this by looking for a device used in a particular industry (oil and gas/petrochemical, for instance) or by looking for a device for a particular environmental condition (waterproof or explosion proof, for example). Explain the operation of the device from a physics perspective and discuss the main features or specifications. Explain how the packaging, assembly, or housing makes the device appropriate for the unique environmental conditions. Be sure to provide a link to the product page.