Product Reference Guide

ISA CODE

Conductor & Characteristics

Temperature Range

Limits of Error

 

Positive

Negative

Fahrenheit

Celsius

Standard

Special

J

Iron
(Magnetic)

Constantan
(Non-Magnetic)

32° to 1382°

0° to 750°

2.2°C (4°F) or 0.75%

1.1°C (2°F) or .4%

Jx

Iron
(White)

Constantan
(Red)

32° to 392°

0° to 750°

2.2°C (4°F) or 0.75%

1.1°C (2°F) or 0.4%

T

Copper
(Yellow Metal)

Constantan
(Silver Metal)

-328°to 32°
32° to 662°

-200° to 0° *
0° to 350°

1°C (1.8°F) or 1.5%
1°C (1.8°F) or 0.75%

**
0.5°C or (0.9°F) or 0.4%

Tx

Copper
(Blue)

Constantan
(Red)

-76° to +212°

-60° to + 100°

1°C (1.8°F)

0.5°C (0.9°F)

K

Chromel
(Non-Magnetic)

Alumel
(Magnetic)

32° to 2282°

0° to 1250°

2.2°C (4°F)
or 0.75%

1.1°C (2°F)
or 0.4%

Kx

Chromel
(Yellow)

Alumel
(Red)

32° to 392°

0° to 200°

2.2°C(4°F)

---

E

Chromel

Constantan

32° to 1652°

0° to 900°

1.7°C (3°F) or 0.5%

1°C(1.8°F) or 0.4%

Ex

Chromel
(Purple)

Constantan
(Red)

32° to 392°

0° to 200°

1.7°C(3°F)

---

S

Platinum
10% Rhodium

Platinum

32° to 2642°

0° to 1450°

1.5°C(2.7°F) or 0.25%

0.6°C(1.1°F) or 0.1%

R

Platinum
13% Rhodium

Platinum

32° to 2642°

0° to 1450°

1.5°C(2.7°F) or 0.25%

0.6°C(1.1°F) or 0.1%

Sx

Copper
(Black)

11 Alloy
(Red)

32° to 392°

0° to 200°

0.57mV

---

B

Platinum
30% Rhodium

Platinum
6% Rhodium

1472° to 3092°

800° to 1700°

0.5%

.25%

Bx

Copper
(black)

Copper
(White)

32° to 212°

0° to 100°

0,000mV

----

W

Tungsten

Tungsten
26% Rhenuium

32° to 800°
800° to 4200°

0° to 472°
472° to 2315°

4.5°C(8°F)
1% ***

---

W3

Tungsten
3% Rhenium

Tungsten
25% Rhenium

32° to 800°
800° to 4200°

0° to 472°
472° to 2315°

4.5°C(8°F)
1% ***

---

W5

Tungsten
5% Rhenium

Tungsten
26% Rhenium

32° to 800°
800° to 4200°

0° to 472°
472° to 2315°

4.5°C(8°F)
1% ***

---

 

  * Thermocouples and thermocouple materials are normally supplied to meet the limits of error specified in the table for temperatures above 0°C. The same materials, however, may not fall within the sub-zero limits of error given in this section. If materials are required to meet the sub-zero limits, the purchase order must so state. Selection of materials usually will be required.

 ** Little information is available to justify establishing special limits of error for sub-zero temperatures.

*** For wire sizes of .010" dia. and larger.

 

NOTES:

Note 1: Values for J, T, K, E, R, S and B are the same as those specified in ANSI specification MC96.1-1982

Note 2: Where error is given in percent, the percentage applies to the temperature being measured, not the range. Select whichever is greater

Note: Limits of Error for Type N are the same as Type K

Note: Type W5 is also known as Type C