Thermocouple Hom K Alumel / Chromel Qws / Stick / Bar 6mm 8mm 9mm 10mm 12mm
Thermocouple Hom K Alumel /Chromel Rod/ Pas / Bar 6mm 8mm 9mm 10mm 12mm
HOM K (CHROMEL vs ALUMEL) yog siv rau hauv oxidizing, inert lossis qhuav txo cov huab cua. Nws yuav tsum tau tiv thaiv los ntawm sulfurous thiab marginally oxidizing atmospheres. Nws yog txhim khu kev qha thiab muaj qhov tseeb siab ntawm qhov kub siab.
1.Tshuaj lom neegKev sau ua ke
| Khoom siv | Cov tshuaj lom neeg muaj pes tsawg leeg (%) | ||||
| 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 Mechanical
| Khoom siv |
Qhov Ceev (g/cm2)3) | Melting point ℃) | Lub zog tensile (Mpa) | Ntim resistivity (μΩ.cm) | Tus nqi ntev (%) |
| KP(Chromel) | 8.5 | 1427 | >490 | 70.6 (20 ℃) | >10 |
| KN (Alumel) | 8.6 | 1399 | >390 | 29.4 (20 ℃) | >15 |
3.EMF Tus Nqi Ntau Yam ntawm Qhov Kub Sib Txawv
| Khoom siv | Tus nqi EMF Vs Pt (μV) | |||||
| 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 |
| Tus nqi EMF 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 thiab Index | ||
| Ntau yam | Hom | Kev Ntsuas Ntau Yam (°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 Hom K Qws Daim Ntawv Thov
Tus yam ntxwv ntawm Hom K yog tias nws muaj kev ua haujlwm tiv thaiv kev oxidation zoo heev, thiab yuav tsum tau siv tas li hauv huab cua oxidizing thiab inert. Qhov kub siv ntev yog 1000 ℃ thiab lub sijhawm luv luv yog 1200 ℃. Nws yog qhov siv dav tshaj plaws ntawm txhua lub thermocouples; (nws tsis tuaj yeem siv txo cov pa roj).
Thermocouple Ua Haujlwm thiab Ntsuas Kub Ntau Yam:
| Cov Khoom Siv Thermocouple | Kev Ua Haujlwm Kub thiab Kev kam rau siab | |||||
| Chav Kawm I | Chav Kawm II | |||||
| Cov Ntawv Qhia | Anode | Cathode | Kev ntsuas kub | Kev kam rau siab | Kev ntsuas kub | Kev kam rau siab |
| K | NiCr10 | NiAl2 | -40 ℃ -1000 ℃ | ±1.5 ℃ los yog ±0.4% * T | 40 ℃ -1200 ℃ | ±2.5 ℃ lossis 0.75% * T |
| T | Cu | CuNi40 | -40 ℃ -350 ℃ | 40 ℃ -350 ℃ | ± 1 ℃ lossis 0.75% * T | |
| J | Fe | CuNi40 | -40 ℃ -750 ℃ | 40 ℃ -750 ℃ | ±2.5 ℃ lossis 0.75% * T | |
| E | NiCr10 | CuNi45 | -40 ℃ -800 ℃ | 40 ℃ -900 ℃ | ||
| N | NiCr14Si | NiSi4Mg | -40 ℃ -1000 ℃ | 40 ℃ -1200 ℃ | ±2.5 ℃ lossis 0.75% * T | |
| R | Pt-13% Rh | Pt | 0 ℃ -1000 ℃ | 0 ℃ -600 ℃ | ±1.5℃ | |
| S | Pt-10% Rh | 1000 ℃ -1600 ℃ | ±(1+0.003) | 600 ℃ -1600 ℃ | 0.25% * T | |
| B | Pt-30% Rh | Pt-6% Rh | - | - | 600 ℃ -1700 ℃ | ±1.5 ℃ lossis 0.25% * T |
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