M2Smart_Set_Kurzübersicht_Brief Overview_V1.00_de_en
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Table of some known emissivities:
Material
Emissions
Material
Emissions
Aluminum, oxidized
0.2 - 0.4
Glass pane
0.85
Aluminum, bare
0.04
Rubber
0.95
Lead, raw
0.4
Limestone
0.98
Lead, oxidized
0.2 - 0.6
Wood
0.9 - 0.95
Iron, oxidized
0.5 - 0.9
Cork
0.7
Iron, sanded
0.24
Graphite
0.7 - 0.8
Iron, rusted
0.5 - 0.7
Ceramic
0.95
Copper, polished
0.03
Gravel
0.95
Copper, oxidized
0.4 - 0.8
Paper
0.95
Iconel, oxidized
0.7 - 0.95
Fabric (cloth)
0.95
Iconel, sand-blasted
0.3 - 0.6
Sand
0.9
Asphalt
0.95
Snow
0.9
Concrete
0.95
Clay
0.95
Ice
0.98
Water
0.93
Plaster
0.8 - 0.95
Ratio of measurement distance-surface measured (distance to spot ratio; D/S)
With increasing distance between measurement device and measurement object, the diameter of the
measured area increases (measured surface).
The diameter of the lit-up light point (target beam) is smaller than the diameter of the measured
surface and is thus intended only for aiming.
Spot s:
Diameter of the measured surface in mm.
Distance D:
Distance between housing (escape area of the infrared beam) and measured object
in mm.
Fig. 26: Ratio measurement distance-measured surface
(D + 20) / s = 5,7 / 1
The defined measurement distance for a good measurement result is between 135 mm and 310 mm. The
optimal measurement distance, which achieves the most precise measurement result, is 200 mm.
