Thermocouple Aina ya K Alumel /Fimbo ya Chromel/ Fimbo / Baa 6mm 8mm 9mm 10mm 12mm
AINA K (CHROMEL vs ALUMEL ) hutumika katika angahewa za kupunguza vioksidishaji, ajizi au kavu. Ni lazima ilindwe kutokana na angahewa za sulfuri na zenye vioksidishaji kiasi. Inaaminika na ina usahihi wa juu kwa joto la juu.
1.KemikaliMuundo
| Nyenzo | Muundo wa kemikali (%) | ||||
| Ni | Cr | Si | Mn | Al | |
| KP(Chromel) | 90 | 10 | |||
| KN(Alumel) | 95 | 1-2 | 0.5-1.5 | 1-1.5 | |
2.Sifa za Kimwili na Sifa za Kiufundi
| Nyenzo |
Msongamano(g/cm3) | Kiwango myeyuko℃) | Nguvu ya Mkazo (Mpa) | Ustahimilivu wa sauti (μΩ.cm) | Kiwango cha urefu (%) |
| KP(Chromel) | 8.5 | 1427 | > 490 | 70.6(20℃) | >10 |
| KN(Alumel) | 8.6 | 1399 | >390 | 29.4(20℃) | >15 |
3.Masafa ya Thamani ya EMF kwa Halijoto Tofauti
| Nyenzo | Thamani ya 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 |
| Thamani ya 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 |
| Tofauti ya Thermocouple na Index | ||
| Aina mbalimbali | Aina | Masafa ya Vipimo(°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 Aina ya K Rod Maombi
Sifa ya Aina ya K ni kwamba ina utendaji dhabiti wa kuzuia oksidi, na inapaswa kutumika kwa kuendelea katika angahewa ya vioksidishaji na ajizi. Halijoto ya matumizi ya muda mrefu ni 1000 ℃ na ya muda mfupi 1200 ℃. Inatumiwa sana kati ya thermocouples zote; (haiwezi kutumika kupunguza anga ya gesi).
Aina ya Joto ya Kufanya kazi na Kupima ya Thermocouple:
| Nyenzo ya Thermocouple | Kiwango cha joto cha kufanya kazi na Uvumilivu | |||||
| Darasa la I | Darasa la II | |||||
| Kielezo | Anode | Cathode | Upimaji wa muda | Uvumilivu | Upimaji wa muda | Uvumilivu |
| K | NiCr10 | NiAl2 | -40℃-1000℃ | ±1.5℃ au ±0.4%*T | 40 ℃-1200 ℃ | ±2.5℃ au 0.75%*T |
| T | Cu | CuNi40 | -40 ℃-350 ℃ | 40 ℃-350 ℃ | ±1℃ au 0.75%*T | |
| J | Fe | CuNi40 | -40 ℃-750 ℃ | 40 ℃-750 ℃ | ±2.5℃ au 0.75%*T | |
| E | NiCr10 | CuNi45 | -40℃-800℃ | 40℃-900℃ | ||
| N | NiCr14Si | NiSi4Mg | -40℃-1000℃ | 40 ℃-1200 ℃ | ±2.5℃ au 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℃ au 0.25%*T |
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