RayTek 3i - Manual (Page 61)

Raynger 3i Series Operator’s Manual B-3
Material Emissivity
1.0µm 1.6µm 8-14µm
Iron
Oxidized 0.4-0.8 0.5-0.9 0.5-0.9
Unoxidized 0.35 0.1-0.3 n.r.
Rusted n.r. 0.6-0.9 0.5-0.7
Molten 0.35 0.4-0.6 n.r.
Iron, Cast
Oxidized 0.7-0.9 0.7-0.9 0.6-0.95
Unoxidized 0.35 0.3 0.2
Molten 0.35 0.3-0.4 0.2-0.3
Iron, Wrought
Dull 0.9 0.9 0.9
Lead
Polished 0.35 0.05-0.2 n.r.
Rough 0.65 0.6 0.4
Oxidized n.r. 0.3-0.7 0.2-0.6
Magnesium 0.3-0.8 0.05-0.3 n.r.
Mercury n.r. 0.05-0.15 n.r.
Molybdenum
Oxidized 0.5-0.9 0.4-0.9 0.2-0.6
Unoxidized 0.25-0.35 0.1-0.35 0.1
Monel (Ni-Cu) 0.3 0.2-0.6 0.1-0.14
Nickel
Oxidized 0.8-0.9 0.4-0.7 0.2-0.5
Electrolytic 0.2-0.4 0.1-0.3 n.r.
Platinum
Black n.r. 0.95 0.9
Silver n.r. 0.02 n.r.
Steel
Cold-Rolled 0.8-0.9 0.8-0.9 0.7-0.9
Ground Sheet n.r. n.r. 0.4-0.6
Polished Sheet 0.35 0.25 0.1
Molten 0.35 0.25-0.4 n.r.
Oxidized 0.8-0.9 0.8-0.9 0.7-0.9
Stainless 0.35 0.2-0.9 0.1-0.8
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.
Material Emissivity
Table B-1 (continued): Emissivity Values for Metals
n.r. = not recommended