Arexx PRO-66ext External Temperature Sensor PRO-66ext Manuale Utente
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PRO-66ext
53
Table 1: Typical emissivity coefficient values
Material
Emissivity
Aluminum,
polished
0.05
Aluminum, rough surface
0.07
Aluminum, strongly oxidized
0.25
Asbestos
board 0.96
Asbestos
fabric 0.78
Asbestos
paper 0.94
Asbestos
slate
0.96
Brass,
dull,
tarnished
0.22
Brass,
polished 0.03
Brick,
common 0.85
Brick,
glazed,
rough
0.85
Brick, refractory, rough
0.94
Bronze, porous, rough
0.55
Bronze,
polished
0.10
Carbon, purified
0.80
Cast iron, rough casting
0.81
Cast
iron,
polished
0.21
Charcoal,
powdered
0.96
Chromium,
polished
0.10
Clay, fired
0.91
Concrete
0.54
Copper,
polished,
0.01
Copper, commercial burnished
0.07
Copper,
oxidized
0.65
Copper, oxidized to black
0.88
Electrical tape, black plastic
0.95
Enamel
**
0.90
Formica 0.93
Frozen
soil
0.93
Glass
0.92
Glass,
frosted
0.96
Gold,
polished
0.02
Ice
0.97
Iron,
hot
rolled
0.77
Iron,
oxidized
0.74
Iron, sheet galvanized, burnished
0.23