A Thermocouple is a terrific way to measure temperature. The effects of temperature change on dissimilar metals produces a measurable voltage. But to make that measurement you need an amplifier ...
An iNET-510 wiring box should be used if work with thermocouples is required ... 100 mSec), sample rate (samples-per-second-per-channel), voltage measurement range (±20 mV to ±10 V), Digital IIR ...