User Manual

Material
Condition
Temperature-
Range
Emissivity-
factor (ɛ)
Wolfram
-
200°C
600°C ... 1000°C
0.05
0.1 ... 0.16
Heating wire
3300°C
0.39
Zinc
at 400°C oxidized
400°C
0.11
oxidized surface
1000°C ...
1200°C
0.50 ... 0.60
Polished
200°C ... 300°C
0.04 ... 0.05
sheet
50°C
0.20
Zirconium
Zirconium oxide,
Powder
normal
temperature
0.16 ... 0.20
Zirconium silicate,
Powder
normal
temperature
0.36 ... 0.42
Asbestos
tablet
20°C
0.96
Paper
40°C ... 400°C
0.93 ... 0.95
Powder
normal
temperature
0.40 ... 0.60
slate
20°C
0.96
Material
Condition
Temperature-
Range
Emissivity-
factor (ɛ)
Coal
Heating wire
1000°C ...
1400°C
0.53
cleaned (0.9%
Asche)
100°C ... 600°C
0.81 ... 0.79
Cement
-
normal
temperature
0.54
Charcoal
Powder
normal
temperature
0.96
Clay
Fired clay
70°C
0.91
Fabric
(Cloth)
black
20°C
0.98
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