Type K Thermocouple WRCK-231 WRCK-232 

 

Type K Thermocouple WRCK-231 WRCK-232 Brief Description

Type K Thermocouple WRCK-231 WRCK-232 with Fixed adjustable thread joint, splash proof type,WRCK series armoured type Type K Thermocouple WRCK-231 WRCK-232 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 WRCK-231 WRCK-232  is usually used with display, recorder and electronic regulator. Moreover, Type K Thermocouple WRCK-231 WRCK-232 can also be the temp sensor element of assembly-type thermocouple. Type K Thermocouple WRCK-231 WRCK-232  can measure temp of liquid, stream, gas and surface of solid range 0℃～400℃ in all production processes. It is as per GB/T18404-2001 standard.

 

Type K Thermocouple WRCK-231 WRCK-232  Working principle

Type K Thermocouple WRCK-231 WRCK-232 Thermocouple 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 WRCK-231 WRCK-232 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. Armoured Type K Thermocouple WRCK-231 WRCK-232 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 WRCK-231 WRCK-232  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
Cu-CuNi	WRCK	T	≥Φ3	350	400	＜-200	Not provided
						-40～350	±0.75%t

Note：1）It is the absolute value of measuring temperature.

 

Type K Thermocouple WRCK-231 WRCK-232 Thermal response time

When the temperature appear step change, the thermocouple output variation is to the equivalent of 50% of the change, The time required is called the thermal response time “T0.5”

 

Thermal response time of armoured Type K Thermocouple WRCK-231 WRCK-232  should not be more than requirements of the following table:

Thermal response time      T0.5S	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
60	2.0	6.0
8.0	4.0	8.0

 

Type K Thermocouple WRCK-231 WRCK-232 Insulation resistance

When the ambient temp is 20±15℃, and relative humidity is not more than 80﹪, the insulation resistance value between insulation armoured Type K Thermocouple WRCK-231 WRCK-232  wires and outer tube should be as per the following table.

Well diameter mm	Test voltage V-D.C	Insulation resistance MΩ.m
0.5～1.5	50±5	≥1000
＞1.5	500±50	≥1000

 

Type K Thermocouple WRCK-231 WRCK-232 Model

W	R	Specification
		N	NiCr－NiSi
		E	NiCr－CuNi
		C	Cu－CuNi
		Material of thermometric element	K
			Armoured type	-	1	No fixed device
					2	Fixed adjustable thread joint
					3	Flexible adjustable thread joint
					4	Fixed adjustable thread flange
					5	Flexible adjustable thread flange
					Mounting fixed type	0	No junction box
						2	Splash-proof
						3	Water-proof
						8	Hand lever
						8	Little junction box
						9	With compensating lead wire
						Junction box type	1	Insulation
							2	Shell connecting
							7	Insulation（Hand lever）
							8	Shell connecting（Hand lever）
							Working end type	3	3-couples
								4	4-couples
								5	5-couples
								6	6-couples
								Multi-couples
W	R	C	K	-	2	3	1 2	□

 

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