Thermocouple Type E | HB SPEICAL ALLOY

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, %

Type	Ni	Cr	Cu
EP	90	10	–
EN	45	–	55

Specification (IEC60584-1)

Type	EMF Versus Pt.67(mV)
Type	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.