Armored Thermocouple
Armored thermocouple with protective sheath for reliable temperature measurement in harsh industrial and outdoor environments.
Product Application
The equipment is typically used in conjunction with display instruments, recording instruments, electronic computers, and similar devices. It is designed for the direct measurement of liquid, steam, and gas media, as well as solid surface temperatures in various production processes, with a measurement range of 0~1300°C.
Product Principle
The electrodes of the Armored Thermocouple consist of two different conductor materials. When a temperature difference exists between the measuring end and the reference end, a thermoelectric potential is generated, and the connected instrument then displays the temperature value corresponding to this potential.
Product Features
- Short thermal response time, reducing dynamic errors.
- Flexible mounting/installation.
- Wide measuring range.
- High mechanical strength and excellent pressure resistance.
- Junction box protection rating: IP65, IP66.
Technical Parameters
1. Executive Standard of the Product
- International standard IEC60584.
- National standard GB/T18404, GB/T304292.
2. Room Temperature Insulation Resistance
The insulation resistance of the Armored Thermocouple between the electrode and the outer casing must be ≥ 1000 MΩ when measured at an ambient temperature of (20 ± 15)°C, a relative humidity of not more than 80%, and a test voltage of (500 ± 50)V DC. This minimum resistance applies to a 1m-long specimen (1000 MΩ). For a 10m-long specimen, the minimum insulation resistance is 100 MΩ.
3. Temperature measurement range and tolerance
| Model | Graduation | Tolerance level | |||
|---|---|---|---|---|---|
| I | II | ||||
| Tolerance value | Temperature range | Tolerance value | Temperature measurement range | ||
| WRNK | K | -40 ~ +375 | ±1.5°C | -40 ~ +333 | ±2.5°C |
| 375 ~ 1000 | ±0.004|t| | 333 ~ 1200 | ±0.0075|t| | ||
| WRMK | N | -40 ~ +375 | ±1.5°C | -40 ~ +333 | ±2.5°C |
| 375 ~ 1000 | ±0.004|t| | 333 ~ 1200 | ±0.0075|t| | ||
| WREK | E | -40 ~ +375 | ±1.5°C | -40 ~ +333 | ±2.5°C |
| 375 ~ 800 | ±0.004|t| | 333 ~ 900 | ±0.0075|t| | ||
| WRFK | J | -40 ~ +375 | ±1.5°C | -40 ~ +333 | ±2.5°C |
| 375 ~ 750 | ±0.004|t| | 333 ~ 750 | ±0.0075|t| | ||
| WRCK | T | -40 ~ +125 | ±0.5°C | -40 ~ +133 | ±1.0°C |
| 125 ~ 350 | ±0.004|t| | 133 ~ 350 | ±0.0075|t| | ||
| WRPK | S | 0 ~ +1100 | ±1.0°C | 0 ~ 600 | ±1.5°C |
| 1100 ~ 1600 | ±[1+0.003(t-1100)] | 600 ~ 1600 | ±0.0025|t| | ||
| WRQK | R | 0 ~ +1100 | ±1.0°C | 0 ~ 600 | ±1.5°C |
| 1100 ~ 1600 | ±[1+0.003(t-1100)] | 600 ~ 1600 | ±0.0025|t| | ||
| WRRK | B | / | / | 600 ~ 1700 | ±0.0025|t| |
4. Sleeve Material, Outer Diameter, and Maximum Service Temperature
| Graduation | Sleeve Material | Diameter | Recommended maximum service temperature |
|---|---|---|---|
| K | 0Cr18Ni9Ti | 0.25 | 250 |
| 0.5、1.0 | 400 | ||
| 1.5、2.0 | 600 | ||
| 3.0、4.0、4.5、5.0、6.0、8.0 | 800 | ||
| GH3030 or Inconel600 | 0.25 | 300 | |
| 0.5、1.0 | 500 | ||
| 1.5、2.0、3.0 | 800 | ||
| 4.0、4.5、5.0 | 900 | ||
| 6.0、8.0 | 1000 | ||
| N | 0Cr18Ni9Ti | 0.25 | 250 |
| 0.5、1.0 | 400 | ||
| 1.5、2.0 | 600 | ||
| 3.0、4.0、4.5、5.0、6.0、8.0 | 800 | ||
| GH3030 or Inconel600 | 0.25 | 300 | |
| 0.5、1.0 | 500 | ||
| 1.5、2.0、3.0 | 800 | ||
| 4.0、4.5、5.0 | 900 | ||
| 6.0、8.0 | 1000 | ||
| E | 0Cr18Ni9Ti | 0.5、1.0 | 400 |
| 1.5、2.0 | 500 | ||
| 3.0、4.0、4.5 | 600 | ||
| 5.0、6.0、8.0 | 700 | ||
| J | 0Cr18Ni9Ti | 0.5、1.0 | 300 |
| 1.5、2.0 | 400 | ||
| 3.0、4.0、4.5 | 500 | ||
| 5.0、6.0、8.0 | 600 | ||
| T | 0Cr18Ni9Ti | 0.5、1.0 | 200 |
| 1.5、2.0、3.0、4.0、4.5 | 250 | ||
| 5.0、6.0、8.0 | 300 | ||
| S | GH3039 | 2.0、3.0、4.0、4.5 | 1000 |
| 5.0、6.0、8.0 | 1100 | ||
| R | GH3039 | 2.0、3.0、4.0、4.5 | 1000 |
| 5.0、6.0、8.0 | 1100 | ||
| B | GH3039 | 2.0、3.0、4.0、4.5、5.0、6.0、8.0 | 1200 |
The sleeve material can be specially customized according to customers' requirements.
5. Thermal Response Time (t0.5)
| Measurement end form | Armored thermocouple diameter (mm) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| 0.5 | 1.0 | 1.5 | 2.0 | 3.0 | 4.0 | 4.5 | 5.0 | 6.0 | 8.0 | |
| Exposed end type | - | 0.1 | 0.2 | 0.3 | 0.4 | 0.5 | 0.6 | 0.7 | 0.8 | 1.0 |
| Shell type | 0.2 | 0.2 | 0.3 | 0.4 | 0.6 | 0.8 | 1.0 | 1.2 | 2.0 | 4.0 |
| Insulation type | 0.4 | 0.6 | 0.8 | 1.0 | 2.0 | 2.5 | 3.0 | 4.0 | 6.0 | 8.0 |
Measurement end form
- Shell type
- Insulation type
Terminal box form
- Waterproof
- Round plug-in type
- Plug-in type
- Handle type
- Compensating conductor type
6. Installation of fixed devices
- Fixed thread
- Adjustable ferrule thread
- Fixed flange
- Adjustable ferrule flange
- Welding
- Welding
- Welding
7. Additional installation form
Specify radian R-value (i.e., pipe wall or furnace opening diameter) when selecting a model.
- Contact block type (code M).
- Hoop type (code G)
Model Naming Method
W
Temperature Instruments
R
Thermocouples
Temperature sensing element material
NNickel-chromium-nickel-silicon
ENickel-chromium-copper-chromium
MNickel-chromium-silicon-nickel-silicon
JIron-copper-nickel
KCopper-copper-nickel
SPlatinum-rhodium 10-platinum
PPlatinum-rhodium 13-platinum
RPlatinum-rhodium 30-platinum-rhodium 6
K
Armored
Coupling wire pairs
2Double branch
-Single branch
Fixed installation
1No fixed installation
2Fixed thread
3Adjustable ferrule thread
4Fixed flange
5Adjustable ferrule flange
Terminal box type
3Waterproof
6Round plug-in type
7Flat plug-in type
8Handle type
9Compensating conductor type
0Sensing element
Protective tube diameter
2Φ2
3Φ3
4Φ4
5Φ5
6Φ6
8Φ8
Additional device
MContact block type
GHoop type
W
Temperature Instruments
R
Thermocouples
Temperature sensing element material
NNickel-chromium-nickel-silicon
ENickel-chromium-copper-chromium
MNickel-chromium-silicon-nickel-silicon
JIron-copper-nickel
KCopper-copper-nickel
SPlatinum-rhodium 10-platinum
PPlatinum-rhodium 13-platinum
RPlatinum-rhodium 30-platinum-rhodium 6
K
Armored
Coupling wire pairs
2Double branch
-Single branch
Fixed installation
1No fixed installation
2Fixed thread
3Adjustable ferrule thread
4Fixed flange
5Adjustable ferrule flange
Terminal box type
3Waterproof
6Round plug-in type
7Flat plug-in type
8Handle type
9Compensating conductor type
0Sensing element
Protective tube diameter
2Φ2
3Φ3
4Φ4
5Φ5
6Φ6
8Φ8
Additional device
MContact block type
GHoop type
WRNK2132M
Get a QuoteStructure diagram
- WRNK-235 (Fixed thread)
- WRNK-435 (Fixed flange)
- WRNK-010
- WRNK-335 (Adjustable ferrule thread)
- WRNK-535 (Adjustable ferrule flange)
- WRNK-365
- WRNK-275
- WRNK-295
- WRNK-185
Installation form
- Welding of contact block to pipe
- Hoop fixing
Selection Instructions
- Model.
- Graduation number.
- Accuracy level.
- Installation and fixation form.
- Protective tube material.
- Length or insertion depth.
Example: Armored thermocouple, K-type, Class I, fixed ferrule thread, protective tube GH3030, length 450mm, insertion depth300mm, WRNK-236, L*| =450*300, Class I, protective tube GH 3030.