China Thermocouple Type K Alumel / Chromel Rod / Stick / Bar 6mm 8mm 9mm 10mm 12mm Manufacture and Factory

Thermocouple Type K Alumel / Chromel Rod / Stick / Bar 6mm 8mm 9mm 10mm 12mm

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Thermocouple Type K Alumel / Chromel Rod / Stick / Bar 6mm 8mm 9mm 10mm 12mm

TYPE K (CHROMEL vs ALUMEL ) is used in oxidizing, inert or dry reducing atmospheres. It must be protected from sulfurous and marginally oxidizing atmospheres. It is reliable and has high 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 point℃)

Tensile Strength(Mpa)

Volume resistivity(μΩ.cm)

Elongation rate (%)

KP(Chromel)

8.5

1427

>490

70.6(20℃)

>10

KN(Alumel)

8.6

1399

>390

29.4(20℃)

>15

3. EMF Value Range at Different Temperature

Material	EMF value Vs Pt(μV)
Material	100℃	200℃	300℃	400℃	500℃	600℃
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)
700℃	800℃	900℃	1000℃	1100℃
22845~22999	26064~26246	29223~29411	32313~32525	35336~35548
6167~6247	7080~7160	7959~8059	8807~8907	9617~9737

Thermocouple Variety and Index
Variety	Type	Measurement Range(°C)
NiCr-NiSi	K	–200–1300
NiCr-CuNi	E	–200–900
Fe-CuNi	J	–40–750
Cu-CuNi	T	–200–350
NiCrSi-NiSi	N	–200–1300
NiCr-AuFe0.07	NiCr-AuFe0.07	–270–0

0.5″ 12.7mm KP Chromel KN Alumel Thermocouple Type K Rod Application

The characteristic of Type K is that it has strong anti-oxidation performance, and should be used continuously in an oxidizing and inert atmosphere. The long-term use temperature is 1000℃ and the short-term 1200 ℃. It is the most widely used among all thermocouples; (it cannot be used reducing gas atmosphere).

Thermocouple Working and Measuring Temperature Range:

Thermocouple Material

Working temperature Range and Tolerence

Class I

Class II

Index

Anode

Cathode

Measuring termperature

Tolerence

Measuring termperature

Tolerence