Extech Instruments HD300 Guia do Utilizador descarregar pdf (Página 9)

HD300-EN-V2.2 07/13

9

Thermal Emissivity Table for Common Materials

Material

Emissivity

Material

Emissivity

Asphalt

0.90 to 0.98

Cloth (black)

0.98

Concrete

0.94

Human skin

0.98

Cement

0.96

Leather

0.75 to 0.80

Sand

0.90

Charcoal (powder)

0.96

Earth

0.92 to 0.96

Lacquer

0.80 to 0.95

Water

0.67

Lacquer (matt)

0.97

Ice

0.96 to 0.98

Rubber (black)

0.94

Snow

0.83

Plastic

0.85 to 0.95

Glass

0.85 to 1.00

Timber

0.90

Ceramic

0.90 to 0.94

Paper

0.70 to 0.94

Marble

0.94

Chromium oxides

0.81

Plaster

0.80 to 0.90

Copper Oxides

0.78

Mortar

0.89 to 0.91

Iron Oxides

0.78 to 0.82

Brick

0.93 to 0.96

Textiles

0.90

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