Fe- CuNi Constantan Type J Thermocouple Wire

• Customization: Available
• Product Type: Wire
• Material: Fe- CuNi
• Transport Package: Carton or Wooden Case
• Origin: Jiangyin, China

Product Description

Fe- CuNi(Constantan) thermocouple (Type J)

 

Fe-CuNi thermocouple (type J) is also named Fe- Constantan thermocouple. The positive leg Fe(JP) is made by pure Iron, and the main chemical composition of negative leg Constantan (JN) is Cu: Ni≈ 55%: 45%. Although they are all called Constantan, JN does not give the same EMF output curve as EN and TN, it cannot be instead by other Constantan.

The operating temperature range of type J thermocouple is -210~1200ºC, but it is usually used in the temperature range 0~750ºC due to embrittlement of Iron.

Type J thermocouple has good resistance to oxidation and high EMF output against Platinum 67, with good temperature accuracy, sensitivity and stability. It is recommended for vacuum, oxidizing, reducing or inert atmospheres, but it can not be used in sulphurous atmosphere above 500ºC.

Thermocouple temperature range and tolerance

 

Name	Grade	operating temperature range(ºC)		temperature range(ºC)	Tolerance	standard
		long term	short term
K	l	1200	1300	-40~1100	+1.5ºC or+0.4%t	GB/T2614
	ll			-40~1300	+2.5ºC or+0.75%t
E	l	750	900	-40~800	+1.5ºC or+0.4%t	GB/T4993
	ll			-40~900	+2.5ºC or+0.75%t
J	l	600	750	-40~750	+1.5ºC or+0.4%t	GB/T4994
	ll			-40~350	+2.5ºC or+0.75%t
T	l	300	350	-40~350	±0.5ºC or±0.4%t	GB/T2903
	ll				±1ºC or±0.75%t
	lll			-200~40	±1ºC or±1.5%t
N	l	1200	1300	-40~1100	+1.5ºC or+0.4%t	GB/T17615
	ll			-40~1300	+2.5ºC or+0.75%t