Characteristic Emissivity - B+B Sensors DM-Compact Series Operating Manual

OPEARTING MANUAL
CAUTION: On all three methods the object temperature must be different from ambient temperature.
9.3

Characteristic Emissivity

In case none of the methods mentioned above help to determine the emissivity you may use the emissivity tables ►Appendix A – Table of
Emissivity for metals and Appendix B – Table of Emissivity for non-metals. These are average values, only. The actual emissivity of a
material depends on the following factors:
 temperature
 measuring angle
 geometry of the surface
 thickness of the material
 constitution of the surface (polished, oxidized, rough, sandblast)
 spectral range of the measurement
 transmissivity (e.g. with thin films))
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