Tempco Custom Heater Manufacturing

Thermocouple Extension Wire Color Code & Specifications

For United States, Canada & Mexico

ANSI Code ANSI Color Code Positive
(+) Lead
Negative
(-) Lead
Temperature Range Initial Calibration Tolerances
Standard Special
JX Type JX Iron Constantan
(45% Nickel,
55% Copper)
32-392°F (0-200°C) ±2.2°C ±1.1°C
KX Type KX Chromel®
(90% Nickel,
10% Chromium)
Alumel
(95% Nickel,
2% Aluminum,
2% Manganese,
1% Silicon)
32-392°F (0-200°C) ±2.2°C ±1.1°C
EX Type EX Chromel®
(90% Nickel,
Constantan
(45% Nickel,
32-392°F (0-200°C) ±1.7°C ±1.1°C
TX Type TX Copper Constantan
(45% Nickel,
32 to 212°F (0-100°C) ±1.0°C ±0.5°C
NX Type NX Nicrosil
(84.6% Nickel,
4% Chromium,
1.4 % Silicon)
Nisil
(95.6% Nickel,
4.4 % Silicon)
32-392°F (0-200°C) ±2.2°C ±1.1°C
Compensating Extension Wire Type
RX* Type RX Copper Copper Alloy 32-392°F (0-200°C) ±9°F
(±5°C)
N/A
SX* Type SX Copper Copper Alloy 32-392°F (0-200°C) ±9°F
(±5°C)
N/A
BX* Type BX Copper Copper 32 to 212°F (0-100°C) +0°F  (+0°C)
–6.7°F (–3.7°C)
N/A

 

* Due to the non-linearity of the types R, S, and B temperature-emf curves, the error introduced into a thermocouple system by the compensating wire will be variable when expressed in degrees. The degree C tolerances are based on the following measuring junction temperatures.

Type Wire Measuring Junction Temperature
SX Greater than 1598°F (870°C)
BX Greater than 1832°F (1000°C)

 Copper versus copper compensating extension wire, usable to 100°C (212°F) with maximum deviations as indicated, but with no significant deviation over 0°C to 50°C (32°F to 122°F) range.

Tempco logo

CORPORATE HEADQUARTERS

607 North Central Avenue
Wood Dale, IL 60191-1452 USA
Phone: 630.350.2252   Toll Free: 888.268.6396
Fax: 630.350.0232   Email: info@tempco.com

TEMPCO BRANCH OFFICES
We have Branch Offices located across the United States.


DISTRIBUTOR LOG-IN
Authorized SA3 Distributor Log-In


ISO 9001:2015 Certified Company

TEMPCO MEXICO CITY

Phone: 52.55.2451.4070
Fax: 52.55.5561.6889
Email: info@tempcomexico.com
Website: www.tempcomexico.com


Tempco on LinkedIn          Tempco on Instagram          Tempco on YouTube          Tempco on Facebook

© 2020 Tempco Electric Heater Corporation. All Rights Reserved.
top