10. Appendix
10-1. Emissivity
The emissivity indicates the energy radiation characteristics of the
material. The emissivity of most organic materials and painted or
oxidized surfaces is about 0.95, which is the thermometer default setting.
All objects radiate infrared energy. The amount of energy radiation is
based on the actual surface temperature of the object and the emissivity
of the surface. The product senses the infrared energy on the surface of
the object and uses this data to calculate the estimated temperature
value. Many common objects and materials (such as painted metal,
wood, water, leather, fabrics, etc.) can actually emit energy, so it is easy
to get relatively accurate measurements.
For surfaces that emit energy easily (high emissivity), the emissivity is
greater than 90% (0.90). This simplified approach does not apply to
glossy surfaces or painted metals because their emissivity is less than
60% (0.60). These materials do not emit energy easily and are classified
as low-emissivity materials. To measure materials with lower emissivity
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