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Emmisivity Values
Substance
Asphalt
Concrete
Cement
Sand
Earth
Water
Ice
Snow
Glass
Ceramic
Marble
Plaster
Mortar
Brick
Thermal Emissivity
0.90 to 0.98
0.94
0.96
0.90
0.92 to 0.96
0.92 to 0.96
0.96 to 0.98
0.83
0.90 to 0.95
0.90 to 0.94
0.94
0.80 to 0.90
0.89 to 0.91
0.93 to 0.96
Substance
Cloth (black)
Human skin
Lather
Charcoal (powder)
Lacquer
Lacquer (matt)
Rubber (black)
Plastic
Timber
Paper
Chromium oxides
Copper oxides
Iron oxides
Textiles
Thermal Emissivity
0.98
0.98
0.75 to 0.80
0.96
0.80 to 0.95
0.97
0.94
0.85 to 0.95
0.90
0.70 to 0.94
0.81.
0.78
0.78 to 0.82
0.90
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INTRODUCTION
Thank you for purchase of the 8858/8859 Series IR Thermometer. The
8858/8859 Series is capable of non-contact (infrared) temperature
measurements at the touch of a button. The built-in laser pointer
increases target accuracy while the backlight LCD and handy push-
buttons combine for convenient, ergonomic operation.
The Non-contact Infrared Thermometers can be used to measure the
temperature of objects’ surface that is improper to be measured by
traditional (contact) thermometer (such as moving object, the surface
with electricity current or the objects which are uneasy to be touched.)
Proper use and care of this meter will provide years of reliable service.
FEATURES:
•
Precise non-contact measurements
•
High distance to target ratio measures smaller surface areas at
greater distances
•
Widest temperature range
•
Unique flat surface, modern housing design
•
Built-in laser pointer
•
Automatic Data Hold
•
°C
/°F switch
•
Emissivity Digitally adjustable from 0.10 to 1.0
•
MAX, MIN, DIF, AVG temperature displays
•
Backlight LCD display
•
Built-in laser pointer
•
Automatic selection range and Display Resolution 0.1°C(0.1°F)
•
Trigger lock
•
Set high and low alarms
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.
