Objects
Emissivity
Objects
Emissivity
Aluminum
Asbestos
Asphalt
Basalt
Brass
Brick
Carbon
Ceramics
Concrete
Copper
Sludge
Frozen food
Hot food
Glass
Ice
0.30
0.95
0.95
0.70
0.50
0.90
0.85
0.95
0.95
0.95
0.94
0.90
0.93
0.85
0.98
Iron
Lead
Limestone
Oil
Paint
Paper
Plastic
Rubber
Sand
Skin
Snow
Steel
Fabric
Water
Wood
0.70
0.50
0.98
0.94
0.93
0.95
0.95
0.95
0.90
0.98
0.90
0.80
0.94
0.93
0.94
Distance-Spot Ratio
The ThermoPro TP30 measures surface temperature based on the
distance to spot diameter ratio (D: S). As the distance between the
thermometer and the surface increases, the total surface area
measured will also increase. With a distance to spot ratio of 12:1,
the surface area measured has a diameter of roughly 1/12 the
distance.
surface temperature measurement of most organic materials and
painted objects. If you would like to improve the measurement
accuracy of different objects, you can refer to the emissivity table
below.
The default emissivity of this device is 0.95, which is suitable for
Objects
Emissivity
Objects
Emissivity
For the most accurate results, make sure the target has a surface
area of twice the corresponding spot diameter. Insufficient surface
area will result in inaccurate results. The recommended distance to
hold the thermometer from the surface of measurement is 7.87inch
(20cm) away from the surface. This creates a spot measurement
-8- -9-
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