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Type K Thermocouple WRNK2-521 WRNK2-522 Brief Description
Type K Thermocouple WRNK2-521 WRNK2-522 is armoured type thermocouple with double output signal, Flexible adjustable thread flange,splash proof type,Type K Thermocouple WRNK2-521 WRNK2-522 has advantages of being able to bend, high temp resistance, quick thermal response time and being sturdy and durable etc. Like industrial assembly-type thermocouple, as sensor of temp measurement, Type K Thermocouple WRNK2-521 WRNK2-522 is usually used with display, recorder and electronic regulator. Moreover,Type K Thermocouple WRNK2-521 WRNK2-522 can also be the temp sensor element of assembly-type thermocouple. Type K Thermocouple WRNK2-521 WRNK2-522 can measure temp of liquid, stream, gas and surface of solid range 0℃~1000℃ in all production processes. It is as per GB/T18404-2001 standard.
Type K Thermocouple WRNK2-521 WRNK2-522 Working principle
Type K Thermocouple WRNK2-521 WRNK2-522 working principle: two conductors with different components are welded at both ends to form a loop, measuring temperature directly side is called measurement side, terminal side is called reference side. When the temperature between measurement side and reference side has a difference, Type K Thermocouple WRNK2-521 WRNK2-522 will generate heat in the loop current, then connected to the display instrument, And the instrument indicates the corresponding temperature value of the thermal electromotive force generated by the thermocouple. Thermocouple thermoelectric EMF will grow with the measurement temperature’s growth, The size of the thermal electromotive force is related to the temperature of both ends. It has nothing to do with the length, diameter of the thermode. Type K Thermocouple WRNK2-521 WRNK2-522 structure is made of conductor, insulation magnesia and 1Cr18Ni9Ti stainless steel protection tube after many times drawing. Junction box, protective tube, insulated casing, terminals and armoured thermocouple form a basic structure of assembly-type thermocouple, with a variety of installation of fixtures.Type K Thermocouple WRNK2-521 WRNK2-522 has two kinds: insulation type and shell connecting type.
Type K Thermocouple WRNK2-521 WRNK2-522 Main technical parameter
Temperature measurement range and tolerance
Category |
Code |
Graduation |
Outer diameter of well mm |
Temperature℃ |
Max temp℃ |
Allowed error △t |
|
Measuring range℃ |
Allowed error value |
||||||
NiCr-NiSi |
WRNK |
K |
≥Φ3 |
800 |
1000 |
0~1000 |
±2.5℃/±0.75%t |
Note:1)t is the absolute value of measuring temperature.
Thermal response time of Type K Thermocouple WRNK2-521 WRNK2-522 should not be more than requirements of the following table:
Thermal response time |
Shell connecting type |
Insulation type |
Well diameter(min) |
||
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 |
Type K Thermocouple WRNK2-521 WRNK2-522 Model
W |
R |
Spec |
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|
|
N |
NiCr-NiSi |
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E |
NiCr-CuNi |
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C |
Cu-CuNi |
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Material of thermometric element |
K |
|
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Armoured type |
|
1 |
No fixed device |
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2 |
Fixed adjustable thread joint |
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3 |
Flexible adjustable thread joint |
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4 |
Fixed adjustable thread flange |
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5 |
Flexible adjustable thread flange |
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Mounting fixed type |
0 |
No junction box |
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2 |
Splash-proof |
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3 |
Water-proof |
|||||||||||||
8 |
Hand lever |
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8 |
Little junction box |
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9 |
With compensating lead wire |
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Junction box type |
1 |
Insulation |
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2 |
Shell connecting |
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7 |
Insulation(Hand lever) |
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8 |
Shell connecting(Hand lever) |
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Working end type |
3 |
3-couples |
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4 |
4-couples |
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5 |
5-couples |
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6 |
6-couples |
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Multi-couples |
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W |
R |
N |
K |
2 |
5 |
2 |
1 |
□ |
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