Thermocouple & RTD wire

Thermocouple wire lets temperature be measured electronically. A typical construction pairs two dissimilar metals, electrically joined at the sensing point and connected to a voltage-measuring instrument at the other end. When one junction runs hotter than the other, a thermal electromotive force — measured in millivolts — is produced roughly proportional to the difference between the hot and cold junctions.

• Two dissimilar metals
• Hot & cold junction
• Millivolt signal

Typical RTD cable is standard instrumentation cable in two, three or four conductors, or groups of pairs, triads or quads, depending on the RTD type and the number of devices being monitored. Individual or overall shielding is often specified for noise immunity on long runs and in electrically busy plant environments.

• 2, 3 or 4 conductor
• Pairs, triads, quads
• Noise immunity