E

Type E — Chromel / Constantan Thermocouple

Chromel (Ni-Cr) / Constantan (Cu-Ni). Highest EMF output of all standardized thermocouple types. Non-magnetic. Excellent for low-temperature and sub-zero applications.

ASTM E230Base Metal
Tolerance Calculator Products
−200 to +870°C
Chromel (Ni-Cr) / Constantan (Cu-Ni)
~58.7 µV/°C
±1.7°C or ±0.5%
±1.0°C or ±0.4%
+: Purple / −: Red / Overall: Purple
+: Violet / −: White / Overall: Violet
ASTM E230
Type E thermocouple junction construction diagram showing Chromel positive conductor and Constantan negative conductor joined at the hot junction, purple and red ANSI insulation colors

At-a-Glance Specifications

870°C
±1.7°C or ±0.5%
±1.0°C or ±0.4%
ASTM E230

EMF Reference Values — Type E (ASTM E230)

Selected EMF values in millivolts referenced to 0°C. Full tables available on the EMF Tables page.

Key EMF Values

0°C=0.000, 100°C=6.319, 200°C=13.421, 300°C=21.036, 500°C=36.999, 700°C=51.877, 870°C=66.473 mV

Limits of Error — ASTM E230 / IEC 60584-2

ClassRangeLimit of Error
Standard−200 to +870°C±1.7°C or ±0.5% (whichever greater)
Special−200 to +870°C±1.0°C or ±0.4% (whichever greater)
ASTM E230
ASTM E230 — Applicable Standard

All specifications, EMF-temperature tables, and tolerance limits for Type E are defined under ASTM E230. Consult the current edition of this standard for complete reference function coefficients and limits of error across all temperature sub-ranges.

Calculate Tolerance for Type E Compare All Types

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−40 to +750°C
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−200 to +1260°C
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−270 to +370°C
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Comparison Table