J type iron / constantan K type thermocouple wire positive and negtive wire

• Customization: Available
• Type: Insulated
• Conductor Type: Solid
• Model NO.: J
• Application: Heating
• Conductor Material: Chromel Alumel
• Sheath Material: PVC
• Insulation Material: PFA
• Material Shape: Round Wire
• Range of Application: LSOH
• Certification: ISO9001, RoHS
• Brand: Tankii
• Dia: 0.3/0.5/0.8/1.0/1.2/1.6/2.0/2.5/3.2mmm
• Bare wire Surface: Bright/ oxidized
• Grade: I/II/III
• Shape: wire, rod, strip
• MTC: Avaliable
• SGS: Avaliable
• RoHS: Avaliable
• Brand name: Tankii
• Leading time: 5-7 days
• CO: Avaliable
• Transport Package: Carton Box
• Specification: GB/IEC/ANSI/BS, ROHS, SGS
• Trademark: Tankii
• Origin: China
• HS Code: 7505220000
• Production Capacity: 1000t/Month

Product Description

 

Product Description

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.
 

J type iron / constantan K type thermocouple wire positive and negtive wire

TYPE	Chemical Composition%
	Ni	Cu	Mn	Si	Fe
JP	/	/	/	/	100
JN	45	55	/	/	/

Physical Properties:

Type	Density at 20ºC (g/cm³)	Melting point (ºC)	Tensile Strength  (Soft annealed condition in 20ºC) (Mpa)	Elongation (Soft annealed condition in 20ºC) (%)	Resistivity at 20ºC    (μΩ.m)
JP	7.8	1402	≥240	≥20	0.12
JN	8.8	1220	≥390	≥25	0.49

Application of TC wire :
Heating - Gas burners for ovens
Cooling - Freezers
Engine protection - Temperatures and surface temperatures
High temperature control - Iron casting