Fluke Ti20 User Manual download pdf (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

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