RayTek Thermalert GP series - Typical Emissivity Values for Non-Metals

68 Thermalert GP Series Operator’s Manual
C.3 TYPICAL EMISSIVITY VALUES FOR NON-METALS
Material Emissivity
Asbestos 0.95
Asphalt 0.95
Basalt 0.7
Carbon
Unoxidized 0.8-0.9
Graphite 0.7-0.8
Carborundum 0.9
Ceramic 0.95
Clay 0.95
Concrete 0.95
Cloth 0.95
Glass
Plate 0.85
Gravel 0.95
Gypsum 0.8-0.95
Ice 0.98
Limestone 0.98
Paint (non-al.) 0.9-0.95
Paper (any color) 0.95
Plastic (opaque, over 20 mils) 0.95
Rubber 0.95
Sand 0.9
Snow 0.9
Soil 0.9-0.98
Water 0.93
Wood, Natural 0.9-0.95
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