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Two dissimilar lines meeting at a junction point.
Also known as: Thermocouple, TC sensor, Two wires joined at a point, Temperature junction
A thermocouple generates a voltage from the temperature difference between its measuring junction and a reference, so it cannot give an absolute temperature without knowing the reference — cold junction compensation is not optional. The two lines drawn differently represent the two dissimilar metals.
Denotes a thermocouple: two dissimilar conductors joined at a measuring junction, producing a voltage dependent on the temperature difference.
Contexts: Electrical equipment
Measures a difference rather than an absolute temperature, so a known reference junction temperature is required for any absolute reading.
Contexts: Electrical equipment
Comes in lettered types — K, J, T, N and others — each a specified metal pair with its own range and colour code, and the codes differ between national standards.
Contexts: Electrical equipment
Two straight lines of different weight or style converging to meet at a single point, with a lead from each.