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Armored Thermocouple

Armored thermocouple can be bended, and has advantages such as high pressure resistance, fast thermal response, and great durability. The same as industrial thermocouple assemblies, it is also used in combination with display units, recorders and electronic regulators to achieve temperature measurement and control purposes. It can also be used as the sensing element of industrial thermocouple assemblies.

As a commonly used temperature sensor, the armored thermocouple supports direct measurement of the surface temperature of liquids, steam, gases and solids, within temperature range of 0℃~800℃.

Our line of armored thermocouple is available in five structure designs to support direct installation, fixed thermowell installation, movable thermowell installation, fixed flange mounting, and movable flange mounting. The fixed thermowell is disposable during installation, while the movable thermowell can be repeatedly used.

Temperature Range
Conductor combination Code Type Outer diameter of thermowell (mm) Common working temperature ( ℃ ) Max. working temperature ( ℃ ) Allowable variation
Measuring range ( ℃ ) Tolerance
Platinum 10% rhodium / Platinum WRPK S ≥Φ3 1100 1200 0-1200 ±1.5 ℃ or ±1.5%t
Nickel-chromium / Copper Nickel WREK E ≥Φ3 600 700 0-700 ±2.5 ℃ or ±0.75%t
Nickel-chromium / Nisil WRNK K ≥Φ3 800 950 0-900 ±2.5 ℃ or ±0.75%t
Copper / Copper Nickel WRCK T ≥Φ3 350 400 < -200 Not stipulated
-40-350 ±0.75%t
Ferrum / Copper Nickel WRFK J ≥Φ3 500 600 0-600 ±2.5 ℃ or ±0.75%t

Response time of armored thermocouple shall not higher than the value shown in the following table

Response time τ0.5S Thermowell contacting type Insulated type
Thermowell diameter (mm)
2.0 0.4 0.5
3.0 0.6 1.2
4.0 0.8 2.5
5.0 1.2 4.0
6.0 2.0 6.0
8.0 4.0 8.0
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