WRKR,WRNR,WRSR,WRRR-133 Hot air stove dedicated thermocoupleDetailed product description：

WRKR, WRNR, WRSR, WRRR-133 hot blast stove specific thermocouples use special SiC or heat-resistant alloys as the outer protective tube, corundum as the inner protective tube, and the measuring end is treated to form a composite tube type thermocouple. This series of products has a novel structure, pressure resistance, and long service life. It is mainly suitable for continuous measurement of the top temperature of hot blast stoves in metallurgical industry ironmaking plants, and can also be used for temperature measurement of sintering machine igniters, vertical furnace combustion chambers, heating furnaces, homogenization furnaces, etc.

1. Main technical indicators

model	graduation mark	Tolerance value	Measurement range (℃)	Thermal response time τ 0.5 (s)
WRKR-133□	K	±0.75%t	0~1280	Φ 20 pipe ＜ 90 Φ 25 ～ Φ 30 pipe ＜ 180
WRNR-133□	N
WRSR-133□	S	±0.25%t	0~1500
WRRR-133□	R

2. Variety specification (mm)

model	graduation mark	protective tube
		material	Diameter d	Length L or L × l
WRKR-133□	K	Corundum (internal)+ Alloy (external)	20~30	750~2000
WRNR-133□	N
WRSR-133□	S	Corundum (internal)+ SiC (external)		750×500 900×750 1150×1000 1650×1500 2150×2000
WRRR-133□	R