ACD M2Smart Series Brief Overview page 48


Table of some known emissivities:
Material
Aluminum, oxidized
Aluminum, bare
Lead, raw
Lead, oxidized
Iron, oxidized
Iron, sanded
Iron, rusted
Copper, polished
Copper, oxidized
Iconel, oxidized
Iconel, sand-blasted
Asphalt
Concrete
Ice
Plaster

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.
M2Smart_Set_Kurzübersicht_Brief Overview_V1.00_de_en
Emissions
0.2 - 0.4
0.04
0.4
0.2 - 0.6
0.5 - 0.9
0.24
0.5 - 0.7
0.03
0.4 - 0.8
0.7 - 0.95
0.3 - 0.6
0.95
0.95
0.98
0.8 - 0.95
Material
Glass pane
Rubber
Limestone
Wood
Cork
Graphite
Ceramic
Gravel
Paper
Fabric (cloth)
Sand
Snow
Clay
Water
Emissions
0.85
0.95
0.98
0.9 - 0.95
0.7
0.7 - 0.8
0.95
0.95
0.95
0.95
0.9
0.9
0.95
0.93
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