Siemens 7MC3040-..., Operating Manual, Page: 64 / 116

s
Operating manual PA
56
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