Mtundu wa Thermocouple K Alumel / Chromel Ndodo / Ndodo / Bar 6mm 8mm 9mm 10mm 12mm
Thermocouple Type K Alumel /Chromel Rod/ Ndodo / Bar 6mm 8mm 9mm 10mm 12mm
TYPE K (CHROMEL vs ALUMEL) imagwiritsidwa ntchito popanga oxidizing, inert kapena youma kuchepetsa atmospheres. Iyenera kutetezedwa ku mpweya wa sulfure komanso wocheperako oxidizing. Ndi yodalirika ndipo imakhala yolondola kwambiri pa kutentha kwakukulu.
1.ChemicalKupanga
| Zakuthupi | Kapangidwe ka mankhwala (%) | ||||
| Ni | Cr | Si | Mn | Al | |
| KP(Chromel) | 90 | 10 | |||
| KN (Alumel) | 95 | 1-2 | 0.5-1.5 | 1-1.5 | |
2.Katundu Wakuthupi ndi Katundu Wamakina
| Zakuthupi |
Kachulukidwe (g/cm3) | Malo osungunuka ℃) | Tensile Strength (Mpa) | Kulephera kwa voliyumu (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 pa Kutentha Kosiyana
| Zakuthupi | Mtengo wa 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 |
| Mtengo wa 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 |
| Mitundu ya Thermocouple ndi Index | ||
| Zosiyanasiyana | Mtundu | Muyezo (°C) |
| NiCr-NiSi | K | - 200-1300 |
| NiCr-CuNi | E | -200-900 |
| Fe-CuNi | J | - 40-750 |
| Ku-Kuni | 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
Makhalidwe a mtundu wa K ndikuti ali ndi mphamvu yotsutsa-oxidation, ndipo ayenera kugwiritsidwa ntchito mosalekeza mumlengalenga wotsekemera komanso wosasunthika. Kutentha kwanthawi yayitali ndi 1000 ℃ ndi kwakanthawi kochepa 1200 ℃. Ndiwogwiritsidwa ntchito kwambiri pakati pa ma thermocouples onse; (sangagwiritsidwe ntchito kuchepetsa mpweya wa mpweya).
Kugwira Ntchito ndi Kuyeza Kutentha kwa Thermocouple:
| Thermocouple Material | Ntchito kutentha Kusiyanasiyana ndi Kulekerera | |||||
| Kalasi I | Kalasi II | |||||
| Mlozera | Anode | Cathode | Kuyeza kutalika kwa nthawi | Kulekerera | Kuyeza kutalika kwa nthawi | Kulekerera |
| K | NiCr10 | NdiAl2 | -40 ℃-1000 ℃ | ± 1.5 ℃ kapena ± 0.4%*T | 40 ℃-1200 ℃ | ±2.5℃ kapena 0.75%*T |
| T | Cu | KuNi40 | -40 ℃-350 ℃ | 40 ℃-350 ℃ | ± 1℃ kapena 0.75%*T | |
| J | Fe | KuNi40 | -40 ℃-750 ℃ | 40 ℃-750 ℃ | ±2.5℃ kapena 0.75%*T | |
| E | NiCr10 | KuNi45 | -40 ℃-800 ℃ | 40 ℃-900 ℃ | ||
| N | NiCr14Si | NiSi4Mg | -40 ℃-1000 ℃ | 40 ℃-1200 ℃ | ±2.5℃ kapena 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 ℃ kapena 0.25%*T |
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