Armored thermocouples serve as temperature measurement sensors, which are used in conjunction with temperature transmitters, regulators, and display instruments to form process control systems. They are used to directly measure or control the temperature of fluids, vapors, gas media, and solid surfaces within the range of 0-1800 ℃ in various production processes. Armored thermocouples have many advantages such as bending, high voltage resistance, fast thermal response time, and durability. Like industrial assembled thermocouples, they are commonly used as temperature sensors in conjunction with display instruments, recording instruments, and electronic regulators









1. It has bendability and can bend in any direction.
2. Armored thermocouples have good resistance to vibration and impact.
3. Armored thermocouples have a long service life,
Measurement range and allowable error range

model	Graduation	Tolerance level
		Grade I		grade ii
		Allowable deviation	Temperature measurement range ℃	Allowable deviation	Temperature measurement range ℃
WRN	K	±1.5℃	-40~+375	±2.5℃	-40~+333
		±0.004（t）	375~1000	±0.0075（t）	333~1200
WRM	N	±1.5℃	-40~+375	±2.5℃	-40~+333
		±0.004（t）	375~1000	±0.0075（t）	333~1200
WRE	E	±1.5℃	-40~+375	±2.5℃	-40~+333
		±0.004（t）	375~800	±0.004（t）	333~900
WRF	J	±1.5℃	-40~+375	±2.5℃	-40~+333
		±0.004（t）	375~750	±0.004（t）	333~750
WRC	T	±0.5℃	-40~+125	±1℃	-40~+133
		±0.004（t）	125~350	±0.0075（t）	133~350
WRP	S			±2.5℃	0~+600
				±0.0025（t）	600~1300
WRQ	R			±2.5℃	0~+600
				±0.0025（t）	600~1300
WRR	B			±2.5℃	0~+600
				±0.0025（t）	600~1600

Note: t is the measured temperature value of the temperature sensing element (℃)

Thermocouple time constant

Thermal inertia level	Time constant (seconds)	Thermal inertia level	Time constant (seconds)
Ⅰ	90-180	Ⅲ	10-30
Ⅱ	30-90	Ⅳ	＜10

WR□	Thermocouple armored type
1	mark	Thermocouple category		Graduation
	N	Nickel chromium nickel silicon		K
	M	Nickel chromium silicon nickel silicon		N
	E	Nickel chromium copper nickel		E
	F	Iron copper nickel		J
	C	Copper Copper Nickel		T
	P	Platinum rhodium 10 platinum		S
	Q	Platinum rhodium 13 platinum		R
	R	Platinum rhodium 30- Platinum rhodium 6		B
	W	Tungsten Rhenium 3-Tungsten Rhenium 25		WRe3/25
	2	mark	Number of thermocouple pairs
		1	Single support type (can be unmarked)
		2	Double branch type
		3	mark	Install fixed devices
			1	No fixed device
			2	Fixed thread
			3	Movable flange
			4	Flange
			5	Flexible tube connector type
			6	Fixed thread cone form
			7	Straight pipe joint type
			8	Fixed threaded pipe joint type
			9	Active threaded pipe joint type
			4	mark	Form of junction box
				2	Splash proof type
				3	Waterproof type
				4	Explosion proof type
				5	mark	Diameter of protective tube (mm)
					0	Ф16
					1	20 (S/R/B type thermocouple with a double-layer tube of 25)
					2	Ø 16 (high aluminum tube, limited to K and N type thermocouples)
					3	Ø 25 (high aluminum tube, limited to K and N type thermocouples)
						Special instructions (diameter marked with Ø size)
					6	Total length L/	mm
						7	Insertion length l	mm
						8	mark	Explosion proof level
							BT4	ExdiiBT4
							CT4	DiiCT4

1. Our company promises that if you purchase our products, during the one-year warranty period, if you receive notification from the user about such defects, our company will unconditionally provide free repair or replacement for products that are indeed defective
2. We promise to handle the customer's technical questions within one working day.
3. We promise to provide test results within 3 working days and complete the repair within 7 working days for the instruments that need to be returned to the factory for repair.
4. Within 2 weeks after returning the instrument to the customer, conduct a follow-up visit to the user and provide free consultation on automation related technologies.