B Common Emission Rate
Thermal Imaging Integrated Network Camera
User Manual
40
Issue V1.0 (2018-05-10)
B
Common Emission Rate
Emission Rate
The emission rate is the capability of an object to emit or absorb energy. An ideal transmitter
provides an emission rate of emitting 100% of intake energy. An object with an emission rate of
0.8 can absorb 80% of intake energy, and reflect the remaining 20%. The emission rate is the
ratio of the energy emitted by an object at a specific temperature to that emitted by an ideal
radiator at the same temperature. The range of emission rate value is 0.0 to 1.0 generally.
Materials
Temperature (
℃
/
℉
)
Emissivity
Gold (High-purity)
227/4 0
0.02
Aluminum foil
27/81
0.04
Aluminum sheet
27/81
0.18
Aluminum used for families
(flat)
23/73
0.01
Aluminum plate ( 98.3%
purity)
227/440
0.04
577/107
0.06
Aluminum plate (rough)
26/78
0.06
Aluminum (oxidized @
599
℃
)
199/390
0.11
599/1110
0.19
Polished aluminum
38/100
0.22
Tin (light tinned Iron sheet)
25/77
0.04