WRB: Platinum Rhodium 30-Platinum Rhodium 6
WRS: Platinum Rhodium 10-Platinum Rhodium 6
WRK: Nickel Chromium-Nickel Silicon
WRN: Nickel Chromium Silicon-Nickel Silicon
WRJ: Iron-Constantan
WRE: Ni-Cr-Constantan
WRT: Single-branch, double-branch single copper-Constantan thermocouple parameter

Industrial thermocouples are usually composed of thermoelectric J insulating material protection tubes and junction boxes. One end of the two thermoelectrics J is welded together to act as a temperature sensing element and is the core part of the thermocouple. The function of the insulating material is to isolate the two thermoelectrics J to prevent short circuits. The function of the protection tube is to prevent the thermoelectric J from directly contacting the measured medium, and it also functions to fix and support the thermocouple temperature sensing element. The function of the junction box is to fix the connection between the temperature sensing element and the external wire, and to protect the temperature sensing element from the external atmosphere.
Product implementation standards: IEC584, IEC1515, GB/T16839-1997, JB/T5582-91
The ambient temperature of the industrial thermocouple is 20±15°C, the relative humidity is not more than 80%, and the test voltage is 500±50V (DC). The insulation resistance between the electric J and the outer sleeve>1000Ω.m.

 
Non-fixed device type (ceramic protection tube) thermocouple

Thermocouple category	Product number	Index number	Temperature range	Specifications		Thermal response time (T0.5s)
				Diameter mm	Protection tube material
Single platinum rhodium 30-platinum rhodium 6	WRB-120-T2	B	0~1600	Φ16	Corundum	＜150
	WRB-121-T2			Φ25		＜360
Double platinum rhodium 30-platinum rhodium 6	WRB2-120-T2			Φ16		＜150
	WRB2-121-T2			Φ25		＜360
Single platinum rhodium 10-platinum rhodium 6	WRS-120-T1	S	0~1300	Φ16	High aluminum	＜150
	WRS-121-T1			Φ25		＜360
Double platinum rhodium 10-platinum rhodium 6	WRS2-120-T1			Φ16		＜150
	WRS2-121-T1			Φ25		＜360
Single nickel chromium-nickel silicon	WRK-122-T1	K	0~1100	Φ16	High aluminum	＜240
	WRK-123-T1		0~1200	Φ20
Double nickel chromium-nickel silicon	WRK2-121-T1		0~1100
Single platinum rhodium 30-platinum rhodium 6	WRB-130-T2	B	0~1600	Φ16	Corundum	＜150
	WRB-131-T2			Φ25		＜360
Double platinum rhodium 30-platinum rhodium 6	WRB2-130-T2			Φ16		＜150
	WRB2-131-T2			Φ25		＜360
Single platinum rhodium 10-platinum rhodium 6	WRS-130-T1	S	0~1300	Φ16	High aluminum	＜150
	WRS-131-T1			Φ25		＜360
Double platinum rhodium 10-platinum rhodium 6	WRS2-130-T1			Φ16		＜150
	WRS2-131-T1			Φ25		＜360
Single nickel chromium-nickel silicon	WRK-133-T1	K	0~1200	Φ20	High aluminum	＜240
Double nickel chromium-nickel silicon	WRK2-133-T1		0~1100

Protection tube diameter and length

Φ16 single layer tube		Φ20		Φ25 double layer tube
Bus length L	Depth l	Bus length L	Depth l	Bus length L	Depth l
300	150	400	250	550	400
350	200	450	300	650	500
400	250	550	400	900	750
450	300	650	500	1150	1000
550	400	900	750	1650	1500
650	500	1150	1000	2150	2000
900	750	1650	1500
1150	1000	2150	2000

Model specification of assembled thermocouple

Thermocouple category	Product number	Index number	Operating temperature range	Material of protection tube	specification
					Total length
Single Nickel Chromium Silicon-Nickel Silicon	WRN-	N	0~1050℃	304 316L 310S GH3030 GH3039	300 350 400 450 500 550 650 900 1150 1650 2150
Double branch Nickel Chromium Silicon-Nickel Silicon	WRN2-
Single Nickel Chromium-Nickel Silicon	WRK-	K (EU-2)*	0~800℃ 0~1000℃	304 321 316L  310S GH3030
Double branch Nickel Chromium-Nickel Silicon	WRK2-
Single Nickel Chromium-Constantan	WRE-	E (EA-2)*	0~600℃	304 321 316L
Double branch Nickel Chromium-Constantan	WRE2-
Single Iron-Constantan	WRJ-	J	0~600℃	304 321 316L
Double branch Iron-Constantan	WRJ2-
Single Copper-Constantan	WRT-	T	0~500℃	304 321 316L
Double branch Copper-Constantan	WRT2-

Note:
1) Thermal response time T0.5<90 seconds
2) Mark "*" index number for special specification order

● Thermocouple without fixed installation device
Product number

WRN(single, double)-120、121、130、131 WRK(single, double)-120、121、130、131 WRE(single, double)-120、121、130、131 WRJ(single, double)-120、121、130、131 WRT(single, double)-120、121、130、131

● Thermocouple with fixed screw mounting device

WRN(single, double) -220、221、230、240、241 WRK(single, double) -220、221、230、240、241 WRE(single, double) -220、221、230、240、241 WRJ(single, double) -220、221、230、240、241 WRT(single, double) -220、221、230、240、241

Fixed welding thread thermocouple specification comparison table
Material: SUS304 or SUS316L

model	M	H	S	D		model	M	H	S
/PS-01	M27*2	32mm	32mm	Φ39		/PS-06	1/8NPT#	10mm	16mm
/PS-02	M33*2#	32mm	36mm	Φ44		/PS-07	1/4NPT#	14mm	19mm
/PS-03	G1/2”#	20mm	27mm	Φ34		/PS-08	1/2NPT#	25mm	27mm
/PS-04	G3/4”	25mm	32mm	Φ39		/PS-08	3/4NPT	25mm	32mm
/PS-05	G1”#	30mm	36mm	Φ44		/PS-10	1NPT#	30mm	38mm
Nominal pressure: 10MPa

Note: The large "#" symbol in the thread size indicates that the diameter of the outer protective tube should be adjusted accordingly.

● Mounting device for movable flange thermocouple
Product number:

WRN(single, double)—320，321，330，331 WRK(single, double)—320，321，330，331 WRE(single, double)—320，321，330，331 WRJ(single, double)—320，321，330，331 WRT(single, double)—320，321，330，331

Movable flange
Material: cast iron

Model number	d	D	Do	do	Nominal pressure
/PF-01	Φ12	Φ70	Φ54	Φ6	Regular pressure
/PF-02	Φ16
/PF-03	Φ20

● Thermocouple for fixed flange mounting device
Product number:

WRN(single, double)—420，421，430，431，440，441 WRK(single, double)—420，421，430，431，440，441 WRE(single, double)—420，421，430，431，440，441 WRJ(single, double)—420，421，430，431，440，441 WRT(single, double)—420，421，430，431，440，441

Fixed flange
Material: 321, 321, 316L, 45# steel

Pg (kg/cm2Kg/cm2)	Main flange size (mm)	Dg（mm）
		10	15	20	25	32	40
1、1.5和6	D	75	80	90	100	120	130
	D1	50	55	65	75	90	100
	D2	32	40	50	60	70	80
	N	4	4	4	4	4	4
	Do	12	12	12	12	14	14
10	D	90	95	105	115	135	145
	D1	60	65	75	85	100	110
	D2	40	45	55	65	78	85
	N	4	4	4	4	4	4
	Do	14	14	14	14	18	18
16	D	90	95	105	115	135	145
	D1	60	65	75	85	100	110
	D2	40	45	55	65	78	85
	N	4	4	4	4	4	4
	Do	14	14	14	14	18	18
25	D	90	95	105	115	135	145
	D1	60	65	75	85	100	110
	D2	40	45	55	65	78	85
	N	4	4	4	4	4	4
	Do	14	14	14	14	18	18
40	D	90	95	105	115	135	145
	D1	60	65	75	85	100	110
	D2	40	45	55	65	78	85
	N	4	4	4	4	4	4
	Do	14	14	14	14	18	18

● Thermocouple with tapered fixed thread mounting device

Thermocouple category	Product number	Index number	Temperature range	Protection tube material	Thread specification	Specifications		Junction box form
						Total length L	Insertion depth l
Single Nickel Chromium-Nickel Silicon	WRK-630/PS-01	K (EU-2)*	0~600℃	321 316L	M27*2	225 250 300 350 400 450 500 550	75 100 150 200 250 300 350 400	Waterproof
	WRK-630/PS-02				M33*2
	WRK-630/PS-05				G1”
Double branch Nickel Chromium-Nickel Silicon	WRK2-630/PS-01				M27*2
	WRK2-630/PS-02				M33*2
	WRK2-630/PS-05				G1”
Single Nickel Chromium-Constantan	WRE-630/PS-01	E (EA-2)*	0~600℃	321 316L	M27*2
	WRE-630/PS-02				M33*2
	WRE-630/PS-05				G1”
Double branch Nickel Chromium-Constantan	WRE2-630/PS-01				M27*2
	WRE2-630/PS-02				M33*2
	WRE2-630/PS-05				G1”

note
1) Response time T0.5<90 seconds
2) Mark "*" index number for special specification order
3) Nominal pressure: 30Mpa, flow rate <80m/s

● Welding fixed conical protection tube thermocouple

Thermocouple category	Product number	Index number	Measuring range	Protection tube material	Thermal response time T0.5s	The appearance of the working end
Single Nickel Chromium-Nickel Silicon	WRK-624	K (EU-2)*	0~600℃	stainless steel 1Cr18Ni9Ti	＜20	Shell type
	WRK-625				＜30	Insulated
Single Nickel Chromium-Constantan	WRE-624	E (EA-2)*			＜20	Shell type
	WRE-625				＜30	Insulated

1) Response time T0.5<90 seconds
2) Mark "*" index number for special specification order
3) Nominal pressure: 30Mpa, flow rate <80m/s

● Movable flange square thermocouple

Thermocouple category	Product number	Index number	Temperature range	Specifications	Junction box form
				Total length L
Single Nickel Chromium-Nickel Silicon	WRK-530	K (EU-2)*	0~800℃	500*500 750*750	Waterproof
Double branch Nickel Chromium-Nickel Silicon	WRK2-530		0~1000℃
Single Nickel Chromium-Constantan	WRE-530	E (EA-2)*	0~600℃
Double branch Nickel Chromium-Constantan	WRE2-530