The difference between Jinhu Hongchuang pt100 thermal resistor and armored thermal resistor

Thermal resistance

Usually used in conjunction with display instruments, recording instruments, electronic computers, etc. Directly measure the temperature of liquid, steam, gaseous media and solid surface in the range of ~℃ where there are explosions such as hydrocarbons at the production site.
, compression spring type temperature sensing element, good earthquake resistance, large measuring range, imported thin film resistor element, reliable and stable performance.
, Thermal resistors
are mainly divided into armored thermal resistors
, thermal resistors
, cross-sectional thermal resistors
, clamp-type pipe wall thermal resistors
, Assembled thermal resistor
, explosion-proof platinum resistor
, etc. In it, we will explain to you the working principles of armored thermal resistors and thermal resistors.
Armored thermal resistor
Uses the characteristic that when the temperature of a substance changes, its resistance also changes to measure temperature. When the resistance value changes, the working instrument displays the temperature value corresponding to the resistance value. The armored thermal resistor is a kind of temperature sensor. It has a smaller diameter than the assembled thermal resistor, is easy to bend, and has good shock resistance. It is suitable for installation in places where the assembled thermal resistor cannot be installed. The series of armored thermal resistors use imported thermal resistance temperature measurement elements. , therefore, it has the advantages of accuracy, sensitivity, fast thermal response time, stable quality, and long service life.
. The outer protective sheath of the armored thermal resistor is made of stainless steel and is filled with high-density oxide insulator. Therefore, the armored thermal resistor has strong anti-pollution performance and mechanical strength, and is suitable for installation in harsh environments.
, is a platinum thermal resistor
, its resistance is proportional to the change in temperature. The relationship between the resistance value and temperature change is that when the temperature is ℃, its resistance value is ohms, and when the temperature is ℃, its resistance value is about ohms. Its industrial principle is that its resistance is ohms at degrees Celsius, and its resistance will increase at a constant rate as the temperature rises. The resistance value and temperature of a metal thermal resistor can generally be expressed by the following approximate relationship, namely [+] where the resistance value at temperature is the corresponding resistance value at temperature (usually °C), which is the temperature coefficient. The relationship between the resistance and temperature of a semiconductor thermistor is: where is the resistance when the temperature is , a constant that depends on the structure of the semiconductor material. In comparison, the thermistor has a larger temperature coefficient and a higher resistance value at room temperature (usually above several thousand ohms), but its interchangeability is poor, its nonlinearity is serious, and its temperature measurement range is only about ~℃. It is widely used in Temperature detection and control for home appliances and automobiles. Metal thermal resistors are generally suitable for temperature measurement within the ~°C range. They are characterized by accurate measurement, good stability, and reliable performance. They are widely used in process control.
, Metal thermal resistors are commonly used in industry. Judging from the change of resistance with temperature, most metal conductors have this property, but not all of them can be used as temperature measuring thermal resistors. The metal material used as a thermal resistor is generally required to be as large and stable as possible. The temperature coefficient and resistivity should be large (reduce the size of the sensor under the same sensitivity), have stable chemical and physical properties within the temperature range used, have good reproducibility of the material, and have an inter-value function relationship between the resistance value and the temperature change ( It is best to have a linear relationship).


_ Model naming method