Explosion Proof Thermocouple

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1300℃. Due to its high mechanical strength, our product can resist pressure very well. Meanwhile, with spring thermal element, our product can also have a good shock-proof performance. Our explosion-proof thermocouple includes a junction box to provide enough strength as well as shock-proof performance. Meanwhile, any components which might produce spark, electric arc, and high temperature are sealed in the junction box. If explosion within the box occurs, the explosion could be extinguished and cooled with the gap of our box.

In addition, our thermocouple varies various explosion proof models. Thus it can be used with explosives such as hydrocarbon. It is usually connected to a display meter, recording meter and computer, etc. You can directly measure the temperature of liquid, vapor, gas and solid surface.

Certificates

Explosion-proof Class	Certificate No.	Certifying institution
d Ⅱ BT4	GTB96450	NEPSI
d Ⅱ BT4	GTB96453	NEPSI
d Ⅱ CT5	GTB98339	NEPSI
d Ⅱ CT5	GTB97197	NEPSI
ia Ⅱ CT6	GTB99412	NEPSI

Remarks: NEPSI National Explosion-Proof Security Inspection

Tolerance

Type	Graduation	Tolerance Class
		I		II
		Tolerance Value	Measuring Range °C	Tolerance Value	Measuring Range °C
WRN	K	±1.5°C	-40 ～ 375	±2.5 °C	-40 ～ 333
WRN	K	±0.004ltl	375 ～ 1000	±0.0075 ltl	333~1200
WRM	N	±1.5°C	-40 ～ 375	±2.5°C	-40 ～ 333
WRM	N	±0.004 ltl	375 ～ 1000	±0.0075 ltl	333 ～ 1200
WRE	E	±1.5°C	-40 ～ 375	±1.5°C	-40 ～ 333
WRE	E	±0.004 ltl	375 ～ 800	±0.004 ltl	333 ～ 900
WRF	J	±1.5°C	-40 ～ 375	±1.5°C	-40 ～ 333
WRF	J	±0.004 ltl	375 ～ 750	±0.004 ltl	333 ～ 750
WRC	T	±1.5°C	-40 ～ 125	±1°C	-40 ～ 133
WRC	T	±0.004 ltl	125 ～ 350	±0.0075 ltl	133 ～ 350

Indication of Explosion-proof
Temperature Group: T1-T6
Explosion-proof Class: A, B, C
Electric Equipment for plant
Explosion Separation Type
Intrinsic Safety Type

Temperature Group
It includes T1-T6 according to maximum surface temperature allowed of open part.

Temperature Group	Max. Surface Temperature Allowed
T1	450
T2	300
T3	200
T4	135
T5	100
T6	85

Naming Method

W	Temperature instrument
	R	Thermocouple
			Thermal Element Material
		M	NiCrSi-NiSi
		N	NiCr-NiSi
		E	NiCr-CuNi
		F	Fe- CuNi
		C	Cu- CuNi
				Filament
				blank Simplex
				2				2 Duplex
					Mounting &fixing
					1 Without fixing device
					2 Threaded connector
					4 Fixed flange
					5 Elbow tube connector
					7 Straight tube connector
					8 Fixed threaded tube connector
					9 Movable threaded tube connector
						Junction box
						4 Explosion-proof Type
							Protection Tube Diameter
								0Φ16
								Measuring End G Variable cross section
W	R	N	2	2	4		G	Model example

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