z
Reminders
- Not recommended for use in measuring shiny or polished metal surfaces ( stainless steel, aluminum, etc.).See
Emissivity
- The unit cannot measure through transparent surfaces such as glass. It will measure the surface temperature of the glass instead.
- Steam, dust, smoke, etc., can prevent accurate measurement by obstructing the unit’s optics.
z
Emissivity
Most (90% of typical applications) organic materials and painted or oxidized surfaces have an emissivity of 0.95 (pre-set in the unit).
Inaccurate readings will result from measuring shiny or polished metal surfaces. To compensate, cove the surface to be measured with
masking tape or flat black paint. Allow time for the tape to reach the same temperature as the material underneath it. Measure the
temperature of the tape or painted surface.
Emissivity Values
Substance Thermal
emissivity Substance Thermal
emissivity
Asphalt
0.90 to 0.98
Cloth (black)
0.98
Concrete
0.94
Human skin
0.98
Cement
0.96
Lather
0.75 to 0.80
Sand
0.90
Charcoal (powder)
0.96
Earth
0.92 to 0.96
Lacquer
0.80 to 0.95
Water
0.92 to 0.96
Lacquer (matt)
0.97
Ice
0.96 to 0.98
Rubber (black)
0.94
Snow
0.83
Plastic
0.85 to 0.95
Glass
0.90 to 0.95
Timber
0.90
Ceramic
0.90 to 0.94
Paper
0.70 to 0.94
Marble
0.94
Chromium oxides
0.81
Plaster
0.80 to 0.90
Copper oxides
0.78
Mortar
0.89 to 0.91
Iron oxides
0.78 to 0.82
Brick
0.93 to 0.96
Textiles
0.90
8. DISCLAIMER
The information given in this manual is not intended to be exhaustive and any person using the product for any purpose other than that
specifically recommended in this manual without first obtaining written confirmation from us as to the suitability of the product for the intended
purpose does so at his own risk. Whilst we endeavour to ensure that all advice we give about the product (whether in this manual or otherwise)
is correct we have no control over either the quality or condition of the product or the many factors affecting the use and application of the
product. Therefore, unless we specifically agree in writing to do so, we do not accept any liability whatsoever or howsoever arising for the
performance of the product or for any loss or damage (other than death or personal injury resulting from our negligence) arising out of the use of
the product. The information contained in this manual is liable to modification from time to time in the light of experience and our policy of
continuous product development.
