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Armored Thermocouple

Product Overview

Section titled “Product Overview”

Armored thermocouples are normally used together with display instruments, recording instruments and electronic computers. They directly measure the temperatures of liquid, steam, gas media and solid surfaces in production processes, within a measurement range of 0 to 1300°C. The thermocouple is made from two different conductor materials. A temperature difference between the measuring end and reference end generates a thermoelectric potential, which the instrument indicates as the corresponding temperature.

Armored thermocouple with multiple probe lengths and mounting configurations.

Applications

Section titled “Applications”
  • Temperature measurement of liquid, steam and gas media in production processes.
  • Solid surface temperature measurement.
  • Applications requiring temperature measurement and recording together with display instruments, recording instruments or electronic computers.

Product Advantages

Section titled “Product Advantages”
  • Short thermal response time to reduce dynamic errors.
  • Bendable mounting for use and adaptation to site routing.
  • Large measurement range, with a maximum of 1300°C.
  • High mechanical strength and good pressure resistance.
  • Junction box protection level available in IP65 and IP66.

Installation Methods

Section titled “Installation Methods”
  • Fixed thread.
  • Adjustable ferrule thread.
  • Fixed flange.
  • Adjustable ferrule flange.
  • A contact block additional device (M) or hoop additional device (G) is available. For contact block or hoop selection, provide the pipe or furnace-wall diameter R.

Key Parameters

Section titled “Key Parameters”

Applicable Standards

Section titled “Applicable Standards”
Item Standard
International standard IEC60584
National standards GB/T18404, GB/T30429

Graduation, Model and Permissible Deviation

Section titled “Graduation, Model and Permissible Deviation”
Model Graduation Class I temperature range and permissible deviation Class II temperature range and permissible deviation
WRNK K -40 to 375°C: ±1.5°C; 375 to 1000°C: ±0.004｜t｜ -40 to 333°C: ±2.5°C; 333 to 1200°C: ±0.0075｜t｜
WRMK N -40 to 375°C: ±1.5°C; 375 to 1000°C: ±0.004｜t｜ -40 to 333°C: ±2.5°C; 333 to 1200°C: ±0.0075｜t｜
WREK E -40 to 375°C: ±1.5°C; 375 to 800°C: ±0.004｜t｜ -40 to 333°C: ±2.5°C; 333 to 900°C: ±0.0075｜t｜
WRFK J -40 to 375°C: ±1.5°C; 375 to 750°C: ±0.004｜t｜ -40 to 333°C: ±2.5°C; 333 to 750°C: ±0.0075｜t｜
WRCK T -40 to 125°C: ±0.5°C; 125 to 350°C: ±0.004｜t｜ -40 to 133°C: ±1.0°C; 133 to 350°C: ±0.0075｜t｜
WRPK S 0 to 1100°C: ±1.0°C; 1100 to 1600°C: ±[1+0.003(t-1100)] 0 to 600°C: ±1.5°C; 600 to 1600°C: ±0.0025｜t｜
WRQK R 0 to 1100°C: ±1.0°C; 1100 to 1600°C: ±[1+0.003(t-1100)] 0 to 600°C: ±1.5°C; 600 to 1600°C: ±0.0025｜t｜
WRRK B / 600 to 1700°C: ±0.0025｜t｜
Section titled “Sleeve Material, Diameter and Maximum Recommended Service Temperature”
Graduation Sleeve material Sleeve outside diameter Maximum recommended service temperature
K, N 0Cr18Ni9Ti Φ0.25 mm 250°C
K, N 0Cr18Ni9Ti Φ0.5, Φ1.0 mm 400°C
K, N 0Cr18Ni9Ti Φ1.5, Φ2.0 mm 600°C
K, N 0Cr18Ni9Ti Φ3, Φ4, Φ4.5, Φ5, Φ6, Φ8 mm 800°C
K, N GH3030, Inconel600 Φ0.25 mm 300°C
K, N GH3030, Inconel600 Φ0.5, Φ1.0 mm 500°C
K, N GH3030, Inconel600 Φ1.5, Φ2, Φ3 mm 800°C
K, N GH3030, Inconel600 Φ4, Φ4.5, Φ5 mm 900°C
K, N GH3030, Inconel600 Φ6, Φ8 mm 1000°C
E 0Cr18Ni9Ti Φ0.5, Φ1.0 mm 400°C
E 0Cr18Ni9Ti Φ1.5, Φ2 mm 500°C
E 0Cr18Ni9Ti Φ3, Φ4, Φ4.5 mm 600°C
E 0Cr18Ni9Ti Φ5, Φ6, Φ8 mm 700°C
J 0Cr18Ni9Ti Φ0.5, Φ1.0 mm 300°C
J 0Cr18Ni9Ti Φ1.5, Φ2 mm 400°C
J 0Cr18Ni9Ti Φ3, Φ4, Φ4.5 mm 500°C
J 0Cr18Ni9Ti Φ5, Φ6, Φ8 mm 600°C
T 0Cr18Ni9Ti Φ0.5, Φ1.0 mm 200°C
T 0Cr18Ni9Ti Φ1.5, Φ2, Φ3, Φ4, Φ4.5 mm 250°C
T 0Cr18Ni9Ti Φ5, Φ6, Φ8 mm 300°C
S, R GH3039 Φ2, Φ3, Φ4, Φ4.5 mm 1000°C
S, R GH3039 Φ5, Φ6, Φ8 mm 1100°C
B GH3039 Φ2, Φ3, Φ4, Φ4.5, Φ5, Φ6, Φ8 mm 1200°C

Sleeve material can be specially customized according to customer requirements.

Thermal Response Time t0.5

Section titled “Thermal Response Time t0.5”
Sleeve outside diameter Φ0.5 mm Φ1 mm Φ1.5 mm Φ2 mm Φ3 mm Φ4 mm Φ4.5 mm Φ5 mm Φ6 mm Φ8 mm
Exposed end type / 0.1 s 0.2 s 0.3 s 0.4 s 0.5 s 0.6 s 0.7 s 0.8 s 1.0 s
Shell type 0.2 s 0.2 s 0.3 s 0.4 s 0.6 s 0.8 s 1.0 s 1.2 s 2.0 s 4.0 s
Insulation type 0.4 s 0.6 s 0.8 s 1.0 s 2.0 s 2.5 s 3.0 s 4.0 s 6.0 s 8.0 s

Insulation Resistance

Section titled “Insulation Resistance”
Item Parameter
Ambient temperature 20±15°C
Relative humidity Not more than 80%
Test voltage DC 500±50 V
Insulation resistance between electrode and outer sleeve Not less than 1000 MΩ
Insulation resistance of 1 m sample 1000 MΩ
Insulation resistance of 10 m sample 100 MΩ

Optional Configurations

Section titled “Optional Configurations”
  • Measuring-end form: exposed end type, shell type and insulation type.
  • Junction box: waterproof type, round plug-in type, plug-in type, flat plug-in type, handle type and compensating conductor type.
  • Thermocouple quantity: single or double.
  • Sleeve outside diameter: Φ2, Φ3, Φ4, Φ5, Φ6 and Φ8 mm.
  • Sleeve material can be specially customized according to customer requirements.

Main Models

Section titled “Main Models”
  • WRNK-010
  • WRNK-185
  • WRNK-235
  • WRNK-275
  • WRNK-295
  • WRNK-335
  • WRNK-365
  • WRNK-435
  • WRNK-535

Information Required for Inquiry

Section titled “Information Required for Inquiry”
  • Required model, graduation and accuracy class.
  • Installation and fixing form, and whether a contact block or hoop additional device is required.
  • Protective sleeve material, outside diameter, overall length L and insertion depth I.
  • Measured medium, operating temperature range and site pressure.
  • For a contact block or hoop additional device, provide the pipe or furnace-wall diameter R.
Section titled “Related Products”
  • Display instruments, recording instruments and electronic computers: armored thermocouples are normally used with these products.

Product Document Download

Section titled “Product Document Download”
View Product PDF View All Temperature Sensor Downloads