Page 210 - Intro Predictive Maintenance

Thermography 201

Nonmetals °F °C Emissivity
Quartz, Rough, Glass, 1.98mm 540 282 0.9
Fused Glass, 1.98mm 1540 838 0.41
Glass, 6.88mm 540 282 0.93
Glass, 6.88mm 1540 838 0.47
Opaque 570 299 0.92
Opaque 1540 838 0.68
Red Lead 212 100 0.93
Rubber, Hard 74 23 0.94
Rubber, Soft, Gray 76 24 0.86
Sand 68 20 0.76
Sandstone 100 38 0.67
Sandstone, Red 100 38 .60–.83
Sawdust 68 20 0.75
Shale 68 20 0.69
Silica, Glazed 1832 1000 0.85
Silica, Unglazed 2012 1100 0.75
Silicon Carbide 300–1200 149–649 .83–.96
Silk Cloth 68 20 0.78
Slate 100 38 .67–.80
Snow, Fine Particles 20 (D7) 0.82
Snow, Granular 18 (D8) 0.89
Soil Surface 100 38 0.38
Black Loam 68 20 0.66
Plowed Field 68 20 0.38
Soot Acetylene 75 24 0.97
Camphor 75 24 0.94
Candle 250 121 0.95
Coal 68 20 0.95
Stonework 100 38 0.93
Water 100 (38) 100 38 0.67
Waterglass 68 (20) 68 20 0.96
Wood Low .80–.90
Beech, Planed 158 70 0.94
Oak, Planed 100 38 0.91
Spruce, Sanded 100 38 0.89