Prokit's Industries MT-4012 - Manual (Page 7)

Substance Emissivity Substance Emissivity
Asphaltum 0.90 - 0.98 Plastic 0.8 – 0.95
Concrete 0.70 – 0.75 Plastic film 0.5 – 0.95
Sand 0.8 – 0.9 Ceramic glaze 0.85 – 0.95
Soil 0.85 – 0.96 Marble 0.90 – 0.94
Water 0.92 – 0.98 Quartz 0.90
Ice 0.96 – 0.98 Aluminium
(oxidized)
0.7 – 0.8
Snow 0.83 Copper(oxidized) 0.7 – 0.8
Glass 0.9 – 0.95 Iron (oxidized) 0.78 – 0.82
Keramics 0.9 – 0.94 Lead (oxidized) 0.3
Gypsum 0.89 – 0.91 Zinc (oxidized) 0.1
Red brick 0.75 – 0.90 Zincified iron 0.3
Drygoods 0.93 – 0.98 Cast iron
(polished)
0.2
Charcoal 0.96 Iron plate
(oxidized)
0.75 – 0.82
Hominine skin 0.98 Steel plate
(oxidized) 0.8 – 0.9
Leather 0.75 – 0.80 Stainless steel
(Polished)
0.1
Paper 0.8 – 0.94 Gold (polished) 0.1
Lignum 0.8 – 0.9 Silver (polished) 0.1
Asbestus 0.95 Copper(polished) 0.1
Paint 0.9 – 0.98 Aluminium
(polished) 0.1
Rubber 0.90 – 0.98 Chromium
(polished)
0.1
You also can get an object’s emissivity by the
following method.
(1) Attach a black adhesive tape or spread some
black paint on to the surface.
(2) Set the thermometer’s emissivity at 0.95, and
then point the meter to the surface of the black
adhesive tape (/black paint), and make the
measurement. Then you can get a measurement
value (say for T1).
(3) Clear the black adhesive tape (/black paint),
and point the meter to the same place. Adjust
emissivity during measuring; when the
measurement value is T1, the emissivity value on
LCD is about the object’s emissivity.
(4) For some object (e.g. water or with high
temperature) that can’t be attached a black
adhesive tape or spread the black paint, you can
use a contact thermometer make measurement
first, and then use the same method as the above
to get the emissivity.
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