Chromel Copel Russia Standard LPX LNX Type L Bare Thermocouple Wire Class 1
LNX LPX Chromel Copel Russia Standard Type L Thermocouple Extension Bare Wire Class 1
TYPE L (CHROMEL vs Copel) may be used in oxidizing, inert or dry reducing atmospheres, or for short periods of time under vacuum. Must be protected from sulfurous and marginally oxidizing atmospheres. Produces the highest EMF per degree o any standardized thermocouple.
1. Chemical Composition
| Material | Chemical composition (%) | ||||
| Ni | Cr | Cu | Mn | Al | |
| LP(Chromel) | 90 | 10 | |||
| LN(Copel) | 44 | Bal | 0.5-1 | ||
2. Physical properties and Mechnical properties
|
Material |
Density(g/cm3) |
Melting point℃) |
Tensile Strength(Mpa) |
Volume resistivity(μΩ.cm) |
Elongation rate (%) |
| LP(Chromel) | 8.5 | 1427 | >490 | 70.6(20℃) | >25 |
| LN(Copel) | 8.8 | 1220 | >390 | 49.0(20℃) | >25 |
3. EMF Value range at different temperature
| Material | EMF value Vs Pt(mV) | ||||
| 100℃ | 200℃ | 300℃ | 400℃ | 500℃ | |
| LP(Chromel) |
6.750~6.970 |
14.436~14.678 |
22.711~22.967 |
31.348~31.628 |
40.116~40.468 |
| LN(Copel) | |||||
| EMF value Vs Pt(μV) | ||||
| 600℃ | 700℃ | 800℃ | 1000℃ | 1100℃ |
| 48.887~49.309 | 57.612~58.100 | 66.200~66.738 | ||
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