RayTek XR Operating Instructions Manual page 58

Appendix
Material
Asbestos
Asphalt
Basalt
Carbon
Unoxidized
Graphite
Carborundum
Ceramic
Clay
Concrete
Cloth
Glass
Plate
"Gob"
Gravel
Gypsum
Ice
Limestone
Paint (non-al.)
Paper (any color)
Plastic, opaque at 500 µm
thickness (20 mils)
Rubber
Sand
Snow
Soil
Water
Wood, Natural
To optimize surface temperature measurements, consider the following guidelines:

Determine the object emissivity using the instrument which is also to be used for the
measurements.

Avoid reflections by shielding the object from surrounding temperature sources.

For higher temperature objects use instruments with the shortest wavelength possible.

For translucent materials such as plastic foils or glass, assure that the background is uniform
and lower in temperature than the object.
58
1 µm 1.6 µm
0.9
0.8-0.95
0.8-0.9
0.4
0.65
Tab. 4: Typical Emissivity Values
Rev. B2 Feb 2017
N -M
ON ETALS
Emissivity
2.3 µm 5 µm
0.8 0.9
0.95
0.7
0,8-0,9 0.8-0.9
0.8-0.9 0.7-0.9
0.95 0.9
0.8-0.95 0.8-0.95
0.8-0.95 0.85-0.95
0.9 0.9
0.95
0.2 0.98
0.4-0.9 0.9
0.95
0.4-0.97
0.4-0.98
0.95
0.95
0.9
0.9
0.9-0.95
8 – 14 µm
0.95
0.95
0.7
0.8-0.9
0.7-0.8
0.9
0.95
0.95
0.95
0.95
0.85
0.95
0.8-0.95
0.98
0.98
0.9-0.95
0.95
0.95
0.95
0.9
0.9
0.9-0.98
0.93
0.9-0.95
XR