material reaches balance, use infrared thermometer (the preset emissivity is 1.00, 0.1-1.00,
adjustable) measure the temperature of the cover on the material and adjust the emissivity
value of the instrument until the measured temperature is equal to the real temperature,
and the emissivity is the emissivity of the material.
For the determination of emissivity value, please refer to Appendix I and 2. Appendix 2
emissivity table (for reference only)
Appendix 1
Material
Emissivity
Material
Emissivity
Aluminum
Non oxidation
0.02-0.10
Asbestos
0.95
Oxidation
0.02-0.10
Asphalt
0.95
Alumina
Oxidation
0.30
Alumina
0.10-0.30
Basalt
0.70
Rough
0.02-0.10
Brick
Red
0.93
Brass
Polished
0.01-0.05
Emery Ceramics
0.90
0.95
Polished
0.30
Oxidized
0.50
Clay
0.95
Chromium
0.02
Copper
Polished
0.03
Concrete
0.95
Polished
0.05-0.10
Cloth
0.95
Oxidation
0.40-0.80
Glass
0.85
Gold
0.01-0.10
Gravel
0.95
Nickel
chromium iron
alloy
Oxidation
0.70-0.95
Gypsum
0.85-0.95
Frosted
0.30-0.60
Electropolishing 035
Ice
0.95
Iron
Oxidation
0.50-0.90
Paint
Colorless
transparent
0.92
Non oxidation
0.05-0.20
Dark black 0.97
Rusty
0.50-0.70
Rubber
0.95
Cast iron
Oxidation
0.60-0.95
Lime
0.98
Non oxidizing
0.20
Melting
0.20-0.30
The paint has
no alkalinity
0.90-0.95
Forged iron
Matte
0.90
Lead
Polished
0.05-0.10
Any color of paper
0.95
Rough
0.40
Opaque paper
0.95
Oxidation
0.20-0.60
Snow
0.90
Magnesium
0.02-0.10
Soil
Dry
0.92
Mercury
0.05-0.15
Molybdenum Oxidation
xidation
0.20-0.60
Mud
0.95
Non oxidizing
0.10
Water
0.93
Nickel copper
gold
0.10-0.14
Sand (coarse ore)
Nature wood
0.90
0.90-0.95