Siemens 7MC3040-... - Emissivity Coefficient Table PA 20 - PA 30

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Operating manual PA
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16.5 Emissivity Coefficient Table PA 20 – PA 30
List of emissivity coefficients of different materials in %
Pyromter
PA 20
PA 30
Wavelength 
1.1 – 1.7 m
0.8 – 1.1 m
"Black Body"
100
100
Aluminium, polished
5
15
Aluminium, blackened
10
25
Asbestos cement
60
70
Bronce, polished
1
3
Bronze, blackened
15
30
Chromium, polished
15
30
Iron, heavily scaled
90
95
Iron, rolling skin
75
90
Iron, liquid
15
30
Gold and silver
1
2
Graphite, blackened
85
90
Copper, oxidized
70
90
Brass, oxidized (tarnished)
50
70
Nickel
8
20
Porcelain, glazed
50
60
Porcelain, rough
75
85
Soot
90
95
Fireclay
40
50
Slag
80
85
Pottery, glazed
85
90
Bricks
85
90
Zinc
40
60