Noun
Alumel (uncountable)
A magnetic alloy of approximately 95% nickel, 2% aluminium, 2% manganese, and 1% silicon, used to make the negative conductors of certain thermocouples.
Coordinate term: Chromel
K-type thermocouple ( chromel – alumel ) in the standard thermocouple measurement configuration. Source: Internet
The measured voltage turns out to be : where and are the Seebeck coefficients of the conductors attached to the positive and negative terminals of the voltmeter, respectively (chromel and alumel in the figure). Source: Internet