Type E (Chromel/Constantan)
Type E is another broad range thermocouple similar to Type K but with improved accuracy and higher output. It can be used in the same applications as type K, Oxygen or Inert environments.. Although EN, TN, JN are all called Constantan, but EN and TN don’t have the same EMF output curve as JN. EN and TN are able to interchange, but they are not interchangeble with JN. The operating temperature is -200-900℃.
Chemical Composition, %
Specification (IEC60584-1)
| Type | EMF Versus Pt.67(mV) |
| 100℃ | 200℃ | 400℃ | 600℃ | 800℃ |
| EP | 2.784-2.844 | 5.938-6.002 | 12.709-12.819 | 19.537-19.699 | 26.102-26.308 |
| EN | 3.467-3.543 | 7.410-7.492 | 16.109-16.255 | 25.362-25.588 | 34.664-34.960 |
| EP-EN | 6.251-6.387 | 13.348-13.494 | 28.818-29.074 | 44.899-45.287 | 60.766-61.268 |
Physical and Mechanical Properties (RT, Annealed)
| Type | Density, g/cm³ | Melting Point, ℃ | Tensile Strength, MPa | Elongation, % | Resistivity, μΩ.m |
| EP | 8.5 | 1427 | ≥490 | ≥10 | 0.71 |
| EN | 8.5 | 1220 | ≥390 | ≥25 | 0.5 |
Features
- Type E Thermocouple has the largest EMF output and highest sensitivity
- Good stability in the low temperature range up to 300℃
- Excellent property of anti-corrosion in humidity atmosphere
Applications
Type E Thermocouple is ideal parts for measuring small temperature change. It is recommended for oxidizing or inert atmosphere, but can’t be used directly in reducing atmosphere and atmosphere with sulphur gases.
