120x120 mm dimension heating bed thermistor experiment

Hello,

I'm trying to use heated bed 120x120 mm^2 demension in the picture.
The provider said it has a thermistor but they don't know the specific name of it.
I searched on internet but also I could not find the datasheet of it.

Therefore, I planned to measurement and fitting the sig voltage-temperature and designed experiment.
I used multimeter and found the ciruit schematic of thermistor. I wrote it on document I attached.

I will upload the results of experiments later, I hope it will be helpful.

Of course it might be useless if there is a document that describes the name of thermistor. (maybe)