Omega K Type Thermocouple Wire Temperature Sensor With Yellow Connector

A thermocouple is a temperature-measuring device consisting of two dissimilar conductors that contact each other at one or more spots. It produces a voltage when the temperature of one of the spots differs from the reference temperature at other parts of the circuit. Thermocouples are a widely used type of temperature sensorfor measurement and control,and can also convert a temperature gradient into electricity. Commercial thermocouples are inexpensive,interchangeable, are supplied with standard connectors, and can measure a wide range of temperatures. In contrast to most other methods of temperature measurement, thermocouples are self powered and require no external form of excitation.

Measuring junction structure & advantages :

Grounded		• fast response time in relation to ungrounded and isolated junctions.• protects the wires from environmental chemicals and corrosives.• prolongs the operational life of the thermocouple. Longer lifespan than the exposed junction thermocouple.• it is recommended for high pressure applications.• it is the least expensive construction.
Ungrounded		• the thermocouple junction is isolated from the ground. • defects in the MgO insulation can be detected by measuring resistance from loop to sheath.• long term drift under cycling conditions is minimized.
Exposed		• recommended for measurement of noncorrosive static gas, or air.• very fast response time, faster than grounded junction.
Isolated		• the elements are insulated from ground.• performs better than ungrounded or grounded junctions in a thermal cycling environment.