Is the thermocouple of the ਭੱਠੀ ਭੱਠੀ universal?

Of course it is not universal. Thermocouples have index numbers according to the temperature and material composition. Commonly used are K couples, S couples, and b couples. K couples are cheap and use low temperatures, while b couples are expensive and use high temperatures. So if you use thermocouples, Still have to figure out the index number first.