Fluke Thermalert 4.0 Series, User Manual, Page: 125 / 135

Thermalert
®
4.0 Series
Users Manual, Rev. 2.4, Jul 2021
126
Table 15-2: Typical Emissivity Values for Non-Metals
N
ON
-M
ETALS
Emissivity
Material 1 µm 1.6 µm 2.3 µm 5 µm 7.9 µm 8 – 14 µm
Asbestos 0.9 0.8 0.9 0.95
Asphalt 0.95 0.95-1.00 0.95
Basalt 0.7 0.7
Carbon
Unoxidized 0.8-0.95 0,8-0,9 0.8-0.9 0.8-0.9
Graphite 0.8-0.9 0.8-0.9 0.7-0.9 0.45-0.70 0.7-0.8
Carborundum 0.95 0.9 0.9
Ceramic 0.4 0.8-0.95 0.8-0.95 0.95
Clay 0.8-0.95 0.85-0.95 0.95
Coke 0.95-1.00 0.95-1.00 0.95-1.00 0.95-1.00 0.95-1.00 0.95-1.00
Concrete 0.65 0.9 0.9 0.95
Cloth 0.95 0.95
Glass
Plate 0.2 0.98 0.98 0.85
“Gob” 0.4-0.9 0.9
Gravel 0.95 0.95
Gypsum 0.4-0.97 0.8-0.95
Ice 0.98
Limestone 0.4-0.98 0.98
Paint (non-al.) 0.90-1.00 0.9-0.95
Paper (any color) 0.95 0.90-1.00 0.95
Plastic, opaque at 500 µm
thickness (20 mils)
0.95 0.95
Rubber 0.9 0.95-1.00 0.95
Sand 0.9 0.9
Snow 0.9
Soil 0.9-0.98
Water 0.93
Wood, Natural 0.9-0.95 0.90-1.00 0.9-0.95
www. .com
information@itm.com 1.800.561.8187