What is the difference between a thermal resistance thermometer and an armored thermal resistance thermometer

The temperature measurement principle of thermal resistance is based on the characteristic that the resistance value of a conductor or semiconductor changes with temperature. It also has many advantages, such as remote transmission of electrical signals, high sensitivity, strong stability, good interchangeability and accuracy. However, it requires power excitation and cannot measure temperature changes instantaneously.
Industrial thermistors generally use Pt100, Pt10,Cu50,Cu100, The temperature measurement range of platinum resistance thermometers is generally -200-800 ℃, while that of copper resistance thermometers is -40 to 140 ℃. Thermistors and thermocouples have the same type of differentiation, but they do not require compensating wires and are cheaper than thermocouples.
A thermistor thermometer is a type of thermometer that uses a thermistor as a temperature measuring element. It consists of a thermistor and a display instrument (such as a moving coil instrument or an automatic balance bridge), which are connected by wires to transmit resistance change information to the display instrument to reflect the measured temperature. According to the temperature measurement principle of a thermistor, changes in the measured temperature are directly measured through changes in the resistance value of the thermistor. Therefore, changes in the resistance of various wires such as the lead wires of the thermistor can affect temperature measurement.
Armored thermistor is a solid body composed of temperature sensing elements (resistors), leads, insulation materials, and stainless steel sleeves. Its outer diameter is generally between 2 and 8mm, with a minimum of 0.25mm. Compared with ordinary thermistors, it has the following advantages:
1. Small size, no air gap inside, thermal inertia, small measured value;
2. Good mechanical performance, vibration resistance, and impact resistance;
3. Can bend, easy to install;
4. Long service life.
Armored thermistor is a commonly used temperature measuring element in temperature measuring instruments. It is composed of two conductors with different compositions connected at both ends to form a circuit. When the temperature of the thermocouple at the two junction points is different, a thermal current will be generated in the circuit. If there is a temperature difference between the working end and the reference end of the thermocouple, the display instrument will indicate the temperature value corresponding to the thermoelectric potential generated by the thermocouple.
Armored thermocouple is a type of temperature sensor that has a smaller diameter, is more flexible, and has better seismic resistance compared to prefabricated thermocouples. It is suitable for installation in situations where prefabricated thermocouples cannot be installed. The company's armored thermocouples use imported thermistor temperature measuring elements, which have the advantages of precision, sensitivity, fast thermal response time, stable quality, and long service life.