The application principle of thermal resistance temperature sensor

The platinum thermal resistance measurement accuracy is high, it is not only widely used in industrial temperature measurement, and is made into standard benchmark instrument. Commonly used in low temperature zone heat resistance temperature sensor is a kind of temperature detector. Its main characteristic is high accuracy, stable performance.

a, temperature sensors thermal resistance temperature measurement principle and material

thermal resistance temperature sensors are made of pure metal materials, the current application is a lot of platinum and copper, in addition, now has started using survey, nickel, manganese and rhodium materials such as thermal resistance temperature sensors.

temperature sensors thermal resistance temperature measurement is based on the metal conductor resistance value increases with the increase of the temperature of the properties for temperature measurement.

2, the structure of the thermal resistance temperature sensor,

master type temperature sensor application principle of the thermal resistance temperature sensor resistance

as a result, the wires of a resistance temperature sensor to the various wire resistance change will affect temperature measurement.

from the temperature sensor of thermal resistance temperature measurement principle, the measured temperature change is directly through the temperature sensor to measure the thermal resistance tolerance of the change.

3, armored thermal resistance temperature sensor

temperature sensor thermal resistance temperature measurement system by thermal resistance temperature sensor, connecting wire (commonly Can also be called compensation conductor) And display instrument, etc.

compared with the normal thermal resistance temperature sensor, it has the following advantages: (1) small volume, no internal air gap and thermal inertia, small measuring hysteresis; (2) good mechanical properties, resistance to vibration and shock. (3) can bend, easy to install (4) long service life.

armoured thermal resistance temperature sensor consists of thermal components ( The resistor body) , wire, insulation materials, stainless steel casing combination solid body, its diameter is commonly & phi; 2 ~φ 8 mm, achieve more xiaoke & phi; 0. 25mm。

Pt100 platinum resistance - 200 ~ 600 ℃ grade A: & plusmn; （ 0. 15 + 0. 002年∣t∣) ± 0. 06

b级:± （ 0. 30 + 0. 005年∣t∣) ± 0. 12

copper Cu50 - resistance 50 ~ 150℃± （ 0. 30 + 0. 006∣t∣） ± 0. 12

Cu100 ± 0. 10

4, end face temperature sensor resistance

it is compared with general axial thermal resistance temperature sensor, can more accurately and quickly to reflect the actual temperature of end face, is suitable for measuring temperature bearing and other parts of the face.

end face temperature thermal resistance temperature sensor element resistance wire winding by special processing, close to the face in the thermometer.

5, flameproof thermal resistance temperature sensor

flameproof thermal resistance temperature sensor can be used in the Bla ~ B3c zone with explosion danger place temperature measurement.

flameproof thermal resistance temperature sensor through the special structure of the junction box, its shell internal explosive mixed gas by affected by sparks or electric arc explosion limit within the junction box, that wouldn't make production field explosion. Temperature sensors thermal resistance temperature measurement, the system must pay attention to heat resistance temperature sensor and digital display instrument of index number must be consistent.