Hi guys,
I'm looking for a temperature sensor/probe. BUT.... not just any sensor! One like this:


It came from a 40/50 year old watermixer in a bakery. Mixes hot and cold water

No (service)manuals or anything available on the device. Even the company that services them now doesn't have any info on it anymore. And told me a new one could cost me only €1800!

I think it is a pt100 or pt1000 like thing. But in case I am wrong about that. How do I find out what kind of sensor it is? Then I might be able to fabricate something.
Measured the resistance as an open circuit, so it's broken.
Haven't had much luck finding a replacement because of the rim it has, to be able to screw it in the waterpipe.
Someone know of things like these? Or can someone help me to at least find out what kind of sensor it is?
Thanks!