Assembly Thermocouple

Pre-assembled thermocouple assemblies with sheath and connector options for fast installation and reliable field performance.

Product Application

Usually used in conjunction with display instruments, recording instruments, electronic computers and so on. Direct measurement of various production processes (0 ~ 1300)°C range of liquid, steam and gas media and solid surface temperature.

Product Principle

The electrodes of the Armored Thermocouple consist of two different conductor materials. When there is a temperature difference between the measuring end and the reference end, a thermoelectric potential is generated and the working instrument displays the temperature value corresponding to the thermoelectric potential.

Product Features

Less thermal response time, reducing dynamic errors.
Bendable mounting for use.
Large measuring range.
High mechanical strength, good pressure resistance.
Junction box protection level 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 Assembly Thermocouple is ≥ 1000 MΩ between the electrode and the outer casing 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. That is, the insulation resistance of a 1m-long specimen is 1000MN; and the insulation potential of a 10m-long specimen is 100 MΩ.

3. Temperature measurement range and tolerance

s el	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
WRNK	K	375 ~ 1000	±0.004\|t\|	333 ~ 1200	±0.0075\|t\|
WRMK	N	-40 ~ +375	±1.5°C	-40 ~ +333	±2.5°C
WRMK	N	375 ~ 1000	±0.004\|t\|	333 ~ 1200	±0.0075\|t\|
WREK	E	-40 ~ +375	±1.5°C	-40 ~ +333	±2.5°C
WREK	E	375 ~ 800	±0.004\|t\|	333 ~ 900	±0.0075\|t\|
WRFK	J	-40 ~ +375	±1.5°C	-40 ~ +333	±2.5°C
WRFK	J	375 ~ 750	±0.004\|t\|	333 ~ 750	±0.0075\|t\|
WRCK	T	-40 ~ +125	±0.5°C	-40 ~ +133	±1.0°C
WRCK	T	125 ~ 350	±0.004\|t\|	133 ~ 350	±0.0075\|t\|
WRPK	S	0 ~ +1100	±1.0°C	0 ~ 600	±1.5°C
WRPK	S	1100 ~ 1600	±[1+0.003(t-1100)]	600 ~ 1600	±0.0025\|t\|
WRQK	R	0 ~ +1100	±1.0°C	0 ~ 600	±1.5°C
WRQK	R	1100 ~ 1600	±[1+0.003(t-1100)]	600 ~ 1600	±0.0025\|t\|
WRRK	B	/	/	600 ~ 1700	±0.0025\|t\|

4. Thermal Response Time (t0.5)

Protection tube diameter (mm)	Protective tube material	Thermal response time (s)
Ф16	Non-metallic	≤240
Ф16	Metallic	≤180
Ф20	Metallic	≤240
Ф25	Non-metallic	≤300
Conical protective tube	Metallic	≤300

Model Naming Method

Temperature Instruments

Thermocouples

Temperature sensing element material

NNickel-chromium-nickel-silicon

ENickel-chromium-copper-chromium

MNickel-chromium-silicon-nickel-silicon

FIron-copper-nickel

CCopper-copper-nickel

PPlatinum-rhodium 10-platinum

QPlatinum-rhodium 13-platinum

RPlatinum-rhodium 30-platinum-rhodium 6

Coupling wire pairs

2Double branch

-Single branch

Fixed installation

1No fixed installation

2Fixed thread

3Adjustable flange

4Fixed flange

5Flexible tube joint type

6Fixed thread cone type

7Straight tube fitting type

8Fixed thread tube fitting type

9Adjustable thread tube fitting type

Terminal box type

3Waterproof

Protective tube diameter

0Φ16

1Φ20

2Φ16 High Aluminum Tube

3Φ20 High Aluminum Tube

Additional device form

GVariable cross-section

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