AT31F/AT61F Online Temperature Measurement Thermal Camera User Manual
22
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
