Mineral insulated thermocouple
SAB BRÖCKSKES GmbH & Co. KG

Temperature is an important factor in many areas concerning the environment, scientific research and production. It is a
thermo-dynamic variable that defines the heat content of a material. Material strength changes with alternating
temperature. As a consequence, the characteristics of materials have to be examined at different temperatures. To obtain
a temperature value, defined temperature parameters are used. Here the parameters can be defined, for example, as the
freezing and boiling points of water.
For temperature measurement temperature dependent characteristics of materials have to be taken into account. These
include such things as thermal expansion (expansion thermometer), the dependance of the electric resistance of metallic
conductors (electrical thermometer) and electromotive force (thermocouple) etc.. A temperature measuring device with a
thermocouple as a data indicator tends to consist of the thermometer itself with a measuring point, an extension cable, a
cold junction with a specified constant temperature and a voltmeter.