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AT31F61F Online Temperature Measurement Thermal Camera User Manual
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Appendix A Emissivity of Common Materials
Material
Temperature（℃）
Emissivity
Water
0～100
0.95～0.98
Soil(dry)
20
0.92
Soil(wet)
20
0.95
Woods
17
0.962
Sand
20
0.9
Sandstone
19
0.909～0.935
PVC plastic
70
0.93
Asphalt
20
0.967
Paint
70
0.92～0.94
Wallpaper
20
0.85～0.90
Cloth
20
0.98
Concrete
20
0.92
Pavement surface
5
0.974
Smooth porcelain
20
0.92
Ceramic tile
17
0.94
Gypsum
17
0.86
Bricks
35
0.94
Hard rubber
0～100
0.89
Charcoal
20～400
0.95～0.97
Granite(rough)
20
0.879
Cold rolled steel
70
0.09
Oxidized steel
50
0.88
Copper
20
0.07
Oxidized copper
50
0.6～0.7