The difference between EK thermocouple and PT100 thermal resistor

EK thermocouple and PT100 thermal resistor are two similar types. Although one is a thermocouple and the other is a thermal resistor, do you know the difference between the two types? Here is an introduction to the difference between EK thermocouple and PT100 thermal resistor.

EK thermocouple

Thermocouple is one of the most commonly used temperature detection elements in industry. The working principle of thermocouple is based on the Seebeck effect, that is, the two ends of two conductors of different components are connected into a loop. If the temperature of the two connection ends is different, a physical phenomenon of thermal current is generated in the loop. Its advantages are:

① High measurement accuracy. Because the thermocouple is in direct contact with the object to be measured, it is not affected by the intermediate medium.

② Wide measurement range. Commonly used thermocouples can be continuously measured from -50~+1600℃. Some special thermocouples can measure as low as -269℃ (such as gold, iron, nickel, chromium) and as high as +2800℃ (such as tungsten-rhenium).

③ Simple structure and easy to use. Thermocouples are usually composed of two different metal wires, and are not limited by size and opening. They have a protective sleeve outside, which is very convenient to use.

PT100 thermal resistor

PT100 thermal resistor is the most commonly used temperature detector in the medium and low temperature zone. Its main features are high measurement accuracy and stable performance. Among them, platinum thermal resistor has the highest measurement accuracy. It is not only widely used in industrial temperature measurement, but also made into a standard reference instrument.

PT100 thermal resistor Thermocouple temperature measurement is based on the characteristic that the resistance value of metal conductor increases with the increase of temperature to measure temperature. Thermal resistors are mostly made of pure metal materials. Currently, platinum and copper are the most widely used. In addition, nickel, manganese and rhodium are now used to manufacture thermal resistors.

The above is an introduction to the difference between EK thermocouples and PT100 thermal resistors. I hope you can distinguish these two commonly used thermocouples and thermal resistors.