the.com/thermocouple
Two different metals touch, panic electrically, and call it a temperature reading.
means A sensor made of two different metal wires joined at a point, used to measure temperature by the tiny voltage their junction produces when heated.
from From thermo- (Greek thermē, 'heat') plus couple, meaning a pair joined together — here, the pair of dissimilar metal wires. The physics behind it is the Seebeck effect, named for Thomas Johann Seebeck, who in the early 1820s noticed that joining two different metals and heating one junction generates a measurable voltage. The device took the name 'thermocouple' to describe exactly that: a 'heat-pair' doing the sensing.
- the trick
- junction of two metals generates voltage from heat alone
- discoverer
- seebeck effect, found 1821, named after thomas seebeck
- range king
- measures from minus 200 to over 2000 celsius
- no battery
- it self-powers, generating its own tiny signal