A thermoelectric thermometer is a device that includes a thermocouple (thermoelectric transducer, sensing element) and a millivoltmeter (electrical element) to determine temperatures.
Thermoelectric converters http://termopara.org/devices/marking/120 are 2 dissimilar, connected at one end, electrically conductive element (most often semiconductor metal conductors). The elements form part of a device that uses the thermoelectric effect to determine temperature values.
The determination of temperatures using a thermoelectric converter is based on the Seebeck thermoelectric effect, when at different temperatures at the junction of semiconductors in a closed thermoelectric circuit, an electric current is generated from two dissimilar semiconductor metal conductors.
Due to the presence of free electrons in metal elements, a thermoelectric effect occurs. Different semiconductors have different amounts of free electrons.
The thermoelectric converter helps to determine the temperature indicators under certain conditions:
- First of all, it is necessary to place the working end of the thermoelectric converter into the working environment, stabilizing the temperature of the second free end;
- The next condition will be the measurement of thermoEMF developed by the thermocouple;
- It is necessary to have a calibration characteristic of the thermoelectric converter, which is the dependence of the thermoEMF on the measured temperature.
To determine the numerical values of the working end temperature, a device with a graduated scale for measuring thermocouple thermoEMF should be connected to the thermoelectric converter. This connection is called a thermoelectric thermometer. To ensure the uniformity of the temperature scale of the device, the independence of the thermoelectric converter from the measured temperature is required.
