Type E Thermocouple Wire Description
NiCr- CuNi thermocouple (type E) is also named NiCr- Constantan thermocouple. The main chemical composition of positive leg NiCr (EP) is Ni: Cr≈90:10; negative leg Constantan (EN) is Cu: N≈ 55%: 45%. The operating temperature range of type E thermocouple is -200-900°C.
Type E has a stronger signal & higher accuracy than Type K or Type J at moderate temperature ranges of 1,000F and lower. Type E is also more stable than type K, which adds to its accuracy.
Type E Thermocouple Wire Specifications
Type
|
Chemical composition %
|
Ni
|
Cr
|
Cu
|
Si
|
Al
|
NiCr(anode)
|
90
|
10
|
/
|
/
|
/
|
CuNi(cathode)
|
45
|
/
|
55
|
/
|
/
|
Type
|
EMF Versus Pt.67 (mV)
|
100°C
|
200°C
|
400°C
|
600°C
|
800°C
|
NiCr(EP)
|
2.784-2.844
|
5.938-6.002
|
12.709-12.819
|
19.537-19.699
|
26.102-26.308
|
CuNi(EN)
|
3.467-3.543
|
7.410-7.492
|
16.109-16.255
|
25.362-25.588
|
34.664-34.960
|
NiCr-CuNi (EP-EN)
|
6.251-6.387
|
13.348-13.494
|
28.818-29.074
|
44.899-45.287
|
60.766-61.268
|
Type
|
Density at 20°C(g/m3)
|
Melting point (°C)
|
Tensile Strength(Soft annealed condition in 20°C)(Mpa)
|
Elongation (Soft annealed condition in 20°C)(%)
|
Resistivity at 20°C (μΩ.m)
|
NiCr(EP)
|
8.5
|
1427
|
≥490
|
≥10
|
0.71
|
CuNi(EN)
|
8.5
|
1220
|
≥390
|
≥25
|
0.5
|
Type E Thermocouple Wire Applications
- For Cryogenic Applications.
- Applications, where magnetic fields are generated as E type, is non-magnetic in nature.
- In the aerospace industry where fast response is required.
- Gas temperature measurement in a flow chamber.