Racing Weather From The Sensor Connection

EGT high temperature exhaust gas probes Call 248-417-2622

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ANSI
Code

Alloy Combination

Color Coding USA and Canada

Maximum Useful
Temperature
Range ++

Maximum
Thermocouple Grade
Temperature
Range

EMF (mV)
Over Max.
Temperature
Range

Standard Limits
of Error**
(above O°C)

Special
Limits of Error**
(above O°C)

International
IEC 584-3

Comments
Environment —
Bare Wire

+ Lead

- Lead

Thermocouple
Grade

Extension
Grade

IRON
Fe
(magnetic)

CONSTANTAN
COPPER-NICKEL
Cu-Ni

Thermocouple Grade:
32 to 1382°F
0 to 750°C
Extension Grade:
32 to 392°F
0 to 200°C

–346 to 2193°F
–210 to 1200°C

–8.095 to
69.553

greater of
2.2°C or 0.75%

greater of
1.1°C or 0.4%

Reducing, Vacuum, Inert.
Limited Use in Oxidizing
at High Temperatures.
Not Recommended for
Low Temperatures.

NICKELCHROMIUM
Ni-Cr

NICKEL-ALUMINUM
Ni-AI
(magnetic)

Thermocouple Grade:
–328 to 2282°F
–200 to 1250°C
Extension Grade:
32 to 392°F
0 to 200°C

–454 to 2501°F
–270 to 1372°C

–6.458 to
54.886

greater of
2.2°C or 0.75%

greater of
1.1°C or 0.4%

Clean Oxidizing and Inert.
Limited Use in Vacuum or
Reducing. Wide Temperature
Range, Most Popular Calibration

NICROSIL
Ni-Cr-Si

NISIL
Ni-Si-Mg

Thermocouple Grade:
–450 to 2372°F
–270 to 1300°C
Extension Grade:
32 to 392°F
0 to 200°C

–450 to 2372°F
–270 to 1300°C

–4.345
to 47.513

greater of
2.2°C or 0.75%

greater of
1.1°C or 0.4%

Alternative to Type K.
More Stable
at High Temps

++ Except as further restricted by temperature limits for T/C diameter and insulation tables that follow.
* Not official symbol or standard designation.
** For controlled initial accuracy below 0°C, ask sales department