ircon Modline 5 - Page 140

Applications Guide
138
Rev. L6 Feb 2017 Modline 5
Emissivity Values of miscellaneous Materials (Bulk, Normal Form)
 Unless otherwise noted, these materials have no transmittance in their normal form.
 Emissivity ranges shown for opaque materials represent differences in surface finish: smooth,
polished finish to rough, uneven finish.
 Emissivities of partially transparent materials (*) will also increase with sample thickness.
Material
Emissivity Range by Sensor Series
52, 5R
(One Color Mode)
5G
56
Asphalt, Tar, Pitch
–
–
0.95-1.00
Carbon, Graphite
0.75-0.90
0.70-0.85
0.65-0.80
Cinders, Slag, Cinkers
0.85-0.95
0.85-0.95
0.85-0.95
Coke
0.95-1.00
0.95-1.00
0.95-1.00
Firebrick¹, ~2" thick¹
high purity alumina*
< 0.20
< 0.20
< 0.20
high purity aluminum* silicate (Mullite)*
< 0.20
< 0.20
0.20-0.50
Foods, bulk (fruits, vegetables, oils, meats,
bakery goods, etc.)
–
–
–
Gallium Arsenide solid polished, 0.5 mm-
thick water
–
–
–
Glass, commercial soda-lime¹
0.05" thick*
< 0.05
< 0.05
0.05-0.10
> 4" thick
0.95-1.00
0.95-1.00
0.95-1.00
Oil, animal or vegetable 0.040"
–
–
–
Oil, mineral 0.040"
–
–
–
Paints, oil or water base²
on metal*
–
–
–
on plastic or wood*
–
–
–
Code 3
¹ Highly variable. Values for low emissivity entries can be significantly greater than shown if even small
amounts of impurities are present.
² Paints with metallic pigments may have much lower emissivities.
Table 19: Emissivity Values of miscellaneous Materials