Owner manual

77
Appendix
Emissivity table (continue)
Material
Temperature（°C ）
Emissivity
approximation
Carbon piece
0.85
Isolation piece
0.91～0.94
Sheet metal
0.88～0.90
Glass pipe
0.90
Loop type
0.87
Porcelain enamel
products
0.90
Porcelain enamel
designs
0.83～0.95
Solid materials
0.80～0.93
Ceramics (vase type)
0.90
Film
0.90～0.93
Mica
0.94～0.95
Flume mica
0.90～0.93
Glass
0.91～0.92
Semiconductor
0.80～0.90
Transistor (plastics
sealed)
0.30～0.40
Transistor (metal)
Diode
0.89～0.90
Transmitting loop
Pulse transmission
0.91～0.92
Level chalkiness layer
0.88～0.93
Top loop
0.91～0.92