Fluke Ti20 - C-2. Emissivity Values for Non-Metals

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