ASS000001000 ... Anybody know what the chip/element is?

Hi folks,
I am planning to use Node red, on a Cerbo, to manage a heating system, details irrelevant and not complex, but the form factor of the ASS000001000 is less than ideal for my application.

Anybody know what is inside that lug, it is assembled from, so I can buy a sensing element and fashion mu own case/housing, or even find a compatible unit in a housing that will work as is?

Thanks for looking,
Al

LM335

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