Land UNO - Emissivity Tables; Refractories; Alloys

User Guide User Guide
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Fibroptic Thermometer
Fibroptic Thermometer
6.0 EMISSIVITY TABLES
In order to obtain accurate temperature measurements, the emissivity value of the target
surface must be known. This section of the Thermometer User Guide contains emissivity
values of the most commonly measured materials for each UNO thermometer. Where
no emissivity value is quoted, this means that either the thermometer is not suitable for
the measurement application or the temperature of the target is outside the thermometer's
measurement span. If you have a query regarding the emissivity of the target in your
measurement application, contact Land Infrared.
6.1 Refractories
Material
Thermometer Series
U1 U2 U4
Brass 0.20 0.18 -
oxidised 0.70 0.70 0.70
Chromel & Alumel 0.30 0.30 0.30
oxidised 0.80 0.80 0.80
Constantin & Manganin 0.25 0.22 0.20
oxidised 0.65 0.60 0.60
Inconel 0.30 0.30 0.30
oxidised 0.85 0.85 0.85
Monel 0.25 0.22 0.20
oxidised 0.70 0.70 0.70
Nichrome 0.30 0.28 -
oxidised 0.85 0.85 0.85
Material
Thermometer Series
U1 U2 U4
Alumina 0.30 0.30 0.30
Brick
red 0.80 0.80 0.80
white refractory 0.30 0.35 -
silica 0.55 0.60 -
sillimanite 0.60 0.60 -
Ceramics 0.40 0.50 -
Magnesite - - 0.60
6.2 Alloys
6.0 EMISSIVITY TABLES
In order to obtain accurate temperature measurements, the emissivity value of the target
surface must be known. This section of the Thermometer User Guide contains emissivity
values of the most commonly measured materials for each UNO thermometer. Where
no emissivity value is quoted, this means that either the thermometer is not suitable for
the measurement application or the temperature of the target is outside the thermometer's
measurement span. If you have a query regarding the emissivity of the target in your
measurement application, contact Land Infrared.
6.1 Refractories
Material
Thermometer Series
U1 U2 U4
Brass 0.20 0.18 -
oxidised 0.70 0.70 0.70
Chromel & Alumel 0.30 0.30 0.30
oxidised 0.80 0.80 0.80
Constantin & Manganin 0.25 0.22 0.20
oxidised 0.65 0.60 0.60
Inconel 0.30 0.30 0.30
oxidised 0.85 0.85 0.85
Monel 0.25 0.22 0.20
oxidised 0.70 0.70 0.70
Nichrome 0.30 0.28 -
oxidised 0.85 0.85 0.85
Material
Thermometer Series
U1 U2 U4
Alumina 0.30 0.30 0.30
Brick
red 0.80 0.80 0.80
white refractory 0.30 0.35 -
silica 0.55 0.60 -
sillimanite 0.60 0.60 -
Ceramics 0.40 0.50 -
Magnesite - - 0.60
6.2 Alloys
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