TEMPERATURE CONVERSION

FROM

TO

FORMULA

Fahrenheit Celsius (F - 32) / 1.8
Fahrenheit Kelvin (F + 459.67) / 1.8
Fahrenheit Rankine F + 459.67
Rankine Kelvin R / 1.8
Rankine Celsius (R - 491.67) / 1.8
Rankine Fahrenheit R - 459.67
Celsius Fahrenheit (1.8 x C) + 32
Celsius Rankine (1.8 x C) + 491.67
Celsius Kelvin C + 273.15
Kelvin Rankine 1.8 x K
Kelvin Fahrenheit (1.8 x K) - 459.67
Kelvin Celsius K - 273.15

     Temperature Conversions

 

 Click on blank and type in a value, then click outside the box.

 

STEM CORRECTIONS (mercury in glass thermometers)

 

C = Correction  (for a total immersion thermometer)

K = Differential expansion coefficient between mercury and glass

N = Number of thermometer scale degrees the mercury is out of the bath

ti = Temperature of the thermometer bulb

= Average temperature of the portion of the stem containing mercury which is out of the bath

note: K = .00016/C or K = .00009/ F

ta = Actual temperature

TEMPERATURE COMPARISON CHART

 

 

THERMOCOUPLES

Et = Er + Em

Et = EMF value corresponding to the actual temperature at the Hot Junction

Er = EMF output of the thermocouple if one junction were at 0 C and the other junction were at a temperature equal to the one being used as the reference under discussion.
Em = Measured EMF output of the couple in its configuration of use (that is, reference junction not at 0 C).

 

THERMOCOUPLE IDENTIFICATION TABLE

ANSI

Code

Alloy Combination

Color Coding

Magnetic Lead

Temperature Range

EMF

(mv)

Limits of Error

(Whichever is greater)

 

+ Lead

- Lead

Thermocouple Grade (TG)

Extension Grade (EG)

     

 

Standard

 

Special

     

A

B

(+)

C

(-)

A

B

(+)

C

(-)

         

J

IRON

Fe

CONSTANTAN

COPPER-NICKEL

Cu-Ni

BRN

WHT

RED

BLK

WHT

RED

IRON (+)

TG 0 to 750 C

EG 0 to 200 C

0 to 42.283

2.2 C or .75%

1.1 C

or

.40%

K

CHROMEL

NICKEL-CHROMIUM

Ni-Cr

ALUMEL NICKEL-ALUMEL

Ni-Al

BRN

YEL

RED

YEL

YEL

RED

ALUMEL (-)

TG -200 to 1250 C

EG 0 to 200C

-5.973 to 50.633

2.2 C or

<0 C .75%

>0 C 2.0%

1.1 C

or

.40%

T

COPPER

Cu

CONSTANTAN

COPPER-NICKEL

Cu-Ni

BRN

BLU

RED

BLU

BLU

RED

-

TG -200 to 350 C

EG -60 to 100C

-5.602 to 17.816

1.0 C or

<0 C .75%

>0 C 1.5%

0.5 C

or

.40%

E

CHROMEL

NICKEL-CHROMIUM

Ni-Cr

CONSTANTAN

COPPER-NICKEL

Cu-Ni

BRN

PUR

RED

PUR

PUR

RED

-

TG -200 to 900 C

EG 0 to 200 C

-8.824 to 68.783

1.7C or

<0 C 0.5%

>0 C 1.0%

1.0 C

or

.40%

N*

NICROSIL

Ni-Cr-Si

NISIL

Ni-Si-Mg

BRN

ORN

RED

ORN

ORN

RED

-

TG -270 to 1300 C

EG 0 to 200 C

-4.345 to 47.502

2.2 C or

<0 C .75%

>0 C 2.0%

1.1 C

or

.40%

R

PLATINUM-

13% RHODIUM

Pt-13% Rh

PLATINUM

Pt

-

-

-

GRN

BLK

RED

-

TG 0 to 1450 C

EG 0 to 150 C

0 to 16.741

1.5 C

or

.25%

.60 C

or

.10%

S

PLATINUM-

10% RHODIUM

Pt-10% Rh

PLATINUM

Pt

-

-

-

GRN

BLK

RED

-

TG 0 to 1450 C

EG 0 to 150 C

0 to 14.973

1.5 C

or

.25%

.60 C

or

.10%

B

PLATINUM-

30% RHODIUM

Pt-30% Rh

PLATINUM-

6% RHODIUM

Pt-6% Rh

-

-

-

GRY

GRY

RED

-

TG 0 to 1700 C

EG 0 to 100 C

0 to 12.426

<800 C .50%

none est.

G*

TUNGSTEN

W

TUNGSTEN-

26% RHENIUM

W-26% Re

-

-

-

WT/

BL

WHT

RED

-

TG 0 to 2320 C

EG 0 to 260 C

0 to 38.564

4.5-425 C

1.0% - 2320 C

none est.

C*

TUNGSTEN-

5% RHENIUM

W-5% Re

TUNGSTEN-

26% RHENIUM

W-26% Re

-

-

-

WT/

RED

WHT

RED

-

TG 0 to 2320 C

EG 0 to 870 C

0 to 37.066

4.5-425 C

1.0% - 2320 C

none est.

D*

TUNGSTEN-

3% RHENIUM

W-3% Re

TUNGSTEN-

25% RHENIUM

W-25% Re

-

-

-

WT/

YEL

WHT

RED

-

TG 0 to 2320 C

EG 0 to 260 C

0 to 39.506

4.5-425 C

1.0% - 2320 C

none est.

* Not Official Symbol or Standard

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