Application principle of temperature sensor thermal resistor

Application principle of temperature sensor thermal resistor
The measurement accuracy of platinum thermal resistor is very high. It is not only widely used in industrial temperature measurement, but also made into a standard reference instrument. Temperature sensor thermal resistor is a temperature detector commonly used in medium and low temperature zones. Its main features are high measurement accuracy and stable performance.

Temperature sensor thermal resistor temperature measurement principle and materials

Temperature sensor thermal resistors are mostly made of pure metal materials. Currently, platinum and copper are widely used. In addition, materials such as dian, nickel, manganese and rhodium have begun to be used to manufacture temperature sensor thermal resistors.

Temperature sensor thermal resistor temperature measurement is based on the characteristic that the resistance value of metal conductors increases with the increase of temperature to measure temperature.

Structure of temperature sensor thermal resistor

Proficient temperature sensor thermal resistor Application principle of temperature sensor thermal resistor

Therefore, changes in the resistance of various wires such as the lead wire of the temperature sensor thermal resistor body will affect the temperature measurement.

From the temperature measurement principle of the temperature sensor thermal resistor, it can be seen that the change of the measured temperature is directly measured by the change of the resistance value of the temperature sensor thermal resistor.

Armored temperature sensor thermal resistor

The temperature sensor thermal resistor temperature measurement system is generally composed of a temperature sensor thermal resistor, a connecting wire (also called a compensation wire) and a display instrument.

Compared with ordinary temperature sensor thermal resistors, it has the following advantages: ① Small size, no air gap inside, small measurement lag in thermal inertia; ② Good mechanical properties, vibration resistance, and impact resistance; ③ Can be bent, easy to install ④ Long service life.

The armored temperature sensor thermal resistor is a solid body composed of a temperature sensing element (resistor), a lead, an insulating material, and a stainless steel casing. Its outer diameter is generally φ2~φ8mm, and the smallest can reach φ0.25mm.

Platinum resistance Pt100 -200~600℃ Class A: ±(0.15+0.002∣t∣) ±0.06

Class B: ±(0.30+0.005∣t∣) ±0.12

Copper resistance Cu50 -50~150℃ ±(0.30+0.006∣t∣) ±0.12

Cu100 ±0.10

End temperature sensor thermal resistor

Compared with the general axial temperature sensor thermal resistor, it can more accurately and quickly reflect the actual temperature of the measured end face, and is suitable for measuring the end face temperature of bearings and other parts.

The end face temperature sensor thermal resistor temperature sensing element is wound with specially treated resistance wire and is close to the end face of the thermometer.

Explosion-proof temperature sensor thermal resistor

Explosion-proof temperature sensor thermal resistor can be used for temperature measurement in explosion-hazardous places in Bla~B3c level areas.

The explosion-proof temperature sensor thermal resistor uses a special structure of the junction box to confine the explosion of the explosive mixed gas inside the shell due to sparks or arcs, etc., to the junction box, so that the production site will not cause an explosion. When composing the temperature sensor thermal resistor temperature measurement system, it must be noted that the temperature sensor thermal resistor and the digital display must have the same graduation number.