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THermocouple- very high temperatures possible, relative temperature measurement only between two points, cheaper, more durable
RTD- more expensive, absolute temperature measurement, the most stable, the most accurate, linear (if you use the right material of course)
Hi Leftyretro,
yes i read about seeback effect, but i don't understand what happens to the metals when the temp is going up or down.
i mean to the current carriers (or electrical energy), are their number changed due to changes in temp?
and that is the reason for voltage that is created between the two junctions?
Thanks for your help.