Ti20 – Fluke Ti20 User Manual
Page 64
Ti20
Users Manual
C-4
Table C-1. Emissivity Values for Metals (cont)
Emissivity
Material
1.0 µm
1.6 µm
8 to14 µm
Tin (Unoxidized)
0.25 0.1-0.3 n.r.
Titanium
Polished 0.5-0.75
0.3-0.5 n.r.
Oxidized n.r.
0.6-0.8 0.5-0.6
Tungsten n.r.
0.1-0.6 n.r.
Polished
0.35-0.4
0.1-0.3 n.r.
Zinc
Oxidized 0.6
0.15
0.1
Polished 0.5
0.05
n.r.
Table C-2. Emissivity Values for Non-Metals
Material Emissivity
1.0 µm
1.6 µm
8 to 14 µm
Asbestos 0.9
0.9
0.95
Asphalt n.r.
0.95
0.95
Basalt n.r.
0.7
0.7
Carbon
Unoxidized 0.8-0.95
0.8-0.9 0.8-0.9
Graphite 0.8-0.9
0.7-0.9 0.7-0.8
Carborundum n.r.
0.9
0.9
Ceramic 0.4
0.85-0.95
0.95
Clay n.r.
0.85-0.95
0.95
Concrete
0.65 0.9 0.95
Cloth n.r.
0.95
0.95
Glass
Plate n.r.
0.98
0.85
“Gob”
n.r. 0.9 n.r.
Gravel n.r.
0.95
0.95
Gypsum n.r.
0.4-0.97 0.8-0.95
Ice n.r.
—
0.98