China Various Sizes Chromel Alumel Bare Wire for K Type Temperature Sensor Manufacture and Factory

Various Sizes Chromel Alumel Bare Wire for K Type Temperature Sensor

Short Description:

A Thermocouple is a sensor used to measure temperature. Thermocouples consist of two wire legs made from different metals. The wires legs are welded together at one end, creating a junction. This junction is where the temperature is measured. When the junction experiences a change in temperature, a voltage is created. The voltage can then be interpreted using thermocouple reference tables to calculate the temperature.
NiCr-NiAl (Type K) thermocouple wire finds the widest use in all basemetal thermocouple, at temperature above 500 °C.

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Various Sizes Chromel Alumel Bare Wire for K Type Temperature Sensor

TYPE K (CHROMEL vs ALUMEL ) is used in oxidizing, inert or dry reducing atmospheres. Exposure to vacuum limited to short time periods. Must be protected from sulfurous and marginally oxidizing atmospheres. Reliable and accurate at high temperatures.

1. Chemical Composition

Material	Chemical composition (%)
Material	Ni	Cr	Si	Mn	Al
KP(Chromel)	90	10
KN(Alumel)	95		1-2	0.5-1.5	1-1.5

2. Physical properties and Mechnical properties

Material	Density(g/cm3)	Melting pointºC)	Tensile Strength(Mpa)	Volume resistivity(μΩ.cm)	Elongation rate (%)
KP(Chromel)	8.5	1427	>490	70.6(20ºC)	>10
KN(Alumel)	8.6	1399	>390	29.4(20ºC)	>15

3. EMF Value range at different temperature

Material	EMF value Vs Pt(μV)
Material	100ºC	200ºC	300ºC	400ºC	500ºC	600ºC
KP(Chromel)	2816~2896	5938~6018	9298~9378	12729~12821	16156~16266	19532~19676
KN(Alumel)	1218~1262	2140~2180	2849~2893	3600~3644	4403~4463	5271~5331

EMF value Vs Pt(μV)
700ºC	800ºC	900ºC	1000ºC	1100ºC
22845~22999	26064~26246	29223~29411	32313~32525	35336~35548
6167~6247	7080~7160	7959~8059	8807~8907	9617~9737

4. Type ,designation and kind of thermocouples

Type	Designation	Thermocouple	Thermocouple Grade ID
SC and RC	Copper-copper nickel 0.6 compensated compensating lead	Platonic-rhodium 10-platinum Thermocouple	S and R
SC and RC	Copper-copper nickel 0.6 compensated compensating lead	Platonic-rhodium 13-platinum thermocouple	S and R
KCA	Iron-copper nickel 22 Compensated Compensating Lead	Nickel-chromium nickel thermocouple	K
KCB	Iron-copper nickel 40 compensated compensating lead
KX	Nickel-chromium 10-nickel 3 prolonged compensating Lead / compensating cable
NC	Iron-copper nickel 18 compensated compensating lead	Nickel-chromium silicon-nickel thermocouple	N
NX	Nickel-chromium 14 silicon-nickel 4 prolonged compensating lead / compensating cable	Nickel-chromium silicon-nickel thermocouple	N
EX	Nickel-chromium 10-nickel 45 prolonged compensating lead / compensating cable	Nickel-chromium-cupronickel thermocouple	E
JX	Iron-copper nickel 45 prolonged compensating lead / compensating cable	Iron-constantan thermocouple	J
TX	Iron-nickel-chromium 45 prolonged compensating lead / compensating cable	Copper-constantan thermocouple	T