Dwyer TIC Manual de usuario Pagina 78

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Appendix
Emissivity table (continue)
Material
Temperature°C
Emissivity
approximation
Carbon piece
0.85
Isolation piece
0.910.94
Sheet metal
0.880.90
Glass pipe
0.90
Loop type
0.87
Porcelain enamel
products
0.90
Porcelain enamel
designs
0.830.95
Solid materials
0.800.93
Ceramics (vase type)
0.90
Film
0.900.93
Mica
0.940.95
Flume mica
0.900.93
Glass
0.910.92
Semiconductor
0.800.90
Transistor (plastics
sealed)
0.300.40
Transistor (metal)
Diode
0.890.90
Transmitting loop
Pulse transmission
0.910.92
Level chalkiness layer
0.880.93
Top loop
0.910.92
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