Emissivity; Refractories - Wahl Heat Spy DHS520 User Manual

Wahl DHS520

11.0 EMISSIVITY

In order to obtain accurate temperature measurements, the emissivity value of
the target surface must be known. This section of the User Guide contains
typical emissivity values of the most commonly measured materials for each
thermometer variant.
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
Palmer Wahl for assistance.

11.1 Refractories

Material
Alumina
Brick
Ceramics
Magnesite
Fig. 24 Typical Emissivity Values for Refractories
Page 36
Red
White refractory
Silica
Sillimanite
User Manual
Wahl DHS520/520B
0.30
0.80
0.30
0.30
0.60
0.40
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