Tuam Tshoj Ntau Qhov Loj Chromel Alumel Hlau Liab Qab rau K Hom Kub Sensor Chaw Tsim Khoom thiab Hoobkas

Ntau Qhov Loj Chromel Alumel Liab Qab Hlau rau K Hom Kub Sensor

Kev Piav Qhia Luv:

Lub Thermocouple yog ib lub sensor siv los ntsuas qhov kub. Cov Thermocouple muaj ob ceg hlau ua los ntawm ntau hom hlau. Cov ceg hlau raug vuam ua ke ntawm ib kawg, tsim ib qho kev sib tshuam. Qhov kev sib tshuam no yog qhov uas ntsuas qhov kub. Thaum qhov kev sib tshuam muaj kev hloov pauv ntawm qhov kub, lub zog hluav taws xob raug tsim. Lub zog hluav taws xob ces tuaj yeem txhais tau los ntawm kev siv cov lus qhia thermocouple los xam qhov kub.
NiCr-NiAl (Hom K) thermocouple hlau pom tias siv dav tshaj plaws hauv txhua lub thermocouple basemetal, ntawm qhov kub siab tshaj 500 ° C.

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Cov Lus Qhia Txog Khoom

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Cov Cim Npe Khoom

Ntau Qhov Loj Chromel Alumel Liab Qab Hlau rau K Hom Kub Sensor

HOM K (CHROMEL vs ALUMEL) yog siv rau hauv oxidizing, inert lossis qhuav txo cov huab cua. Kev raug rau lub tshuab nqus tsev tsuas yog lub sijhawm luv luv xwb. Yuav tsum tau tiv thaiv los ntawm sulfurous thiab me ntsis oxidizing huab cua. Txhim khu kev qha thiab raug ntawm qhov kub siab.

1.Tshuaj lom neegCkev xaiv tsa

Khoom siv	Cov tshuaj lom neeg muaj pes tsawg leeg (%)
Khoom siv	Ni	Cr	Si	Mn	Al
KP(Chromel)	90	10
KN (Alumel)	95		1-2	0.5-1.5	1-1.5

2.Cov khoom siv lub cev thiab cov khoom siv tshuab

Khoom siv	Qhov Ceev (g/cm3)	Melting point ºC)	Lub zog tensile (Mpa)	Ntim resistivity (μΩ.cm)	Tus nqi ntev (%)
KP(Chromel)	8.5	1427	>490	70.6 (20ºC)	>10
KN (Alumel)	8.6	1399	>390	29.4 (20ºC)	>15

3.EMF Tus nqi ntau ntawm qhov kub sib txawv

Khoom siv	Tus nqi EMF Vs Pt (μV)
Khoom siv	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

Tus nqi EMF 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.Hom, lub npe thiab hom thermocouples

Hom	Lub Npe	Lub thermocouple	Lub thermocouple Qib ID
SC thiab RC	Tooj liab-tooj liab nickel 0.6 them rov qab cov hlau lead uas them rov qab	Platonic-rhodium 10-platinum Lub thermocouple	S thiab R
SC thiab RC		Platonic-rhodium 13-platinum lub thermocouple	S thiab R
KCA	Hlau-tooj liab nickel 22 Compensated Compensating Cov hlau lead	Nickel-chromium nickel lub thermocouple	K
KCB	Hlau-tooj liab nickel 40 them rov qab ua tus thawj coj
KX	Nickel-chromium 10-nickel 3 ntev dua cov hlau lead / cov cable compensating
NC	Hlau-tooj liab nickel 18 compensated compensating lead	Cov thermocouple nickel-chromium silicon-nickel	N
NX	Nickel-chromium 14 silicon-nickel 4 ntev cov hlau nplaum / cov cable uas them rov qab	Cov thermocouple nickel-chromium silicon-nickel	N
EX	Nickel-chromium 10-nickel 45 ntev dua cov hlau nplaum / cov cable uas them rov qab	Nickel-chromium-cupronickel lub thermocouple	E
JX	Hlau-tooj liab nickel 45 ntev compensating cable ua los ntawm txhuas / compensating	Thermocouple Hlau-constant	J
TX	Hlau-nickel-chromium 45 ntev compensating cable ua los ntawm txhuas / compensating	Tooj liab-constantan lub thermocouple	T