Emissivity
Emissivity is a term used to describe the energy-emitting
characteristics of materials.
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; cover 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.
See table below for values of emissivity of specific materials :
Important information
For correct measurements :
• Do not take any measurement on metal or shiny or reflective
surfaces.
• Do not measure through transparent surfaces such as glass, for
example.
• Water vapor, dust, smoke, etc ... may prevent correct
measurements because they obstruct the optical of the instrument.
• Make sure that the target is larger than the size of the laser
sighting.
Aluminium
0.30
Asbestos
0.95
Asphalt
0.95
Basalt
0.70
Brass
0.50
Brick
0.90
Carbon
0.85
Ceramic
0.95
Concrete
0.95
Copper
0.95
Dirt
0.94
Frozen food
0.90
Hot food
0.93
Glass
0.85
Water
0.93
Ice
0.98
Iron
0.70
Lead
0.50
Limestone
0.98
Oil
0.94
Paint
0.93
Paper
0.95
Plastic
0.95
Rubber
0.95
Sand
0.90
Skin
0.98
Snow
0.90
Steel
0.80
Textile
0.94
Wood
0.94
To avoid any inconvenience :
• Do not aim directly or indirectly (reflection on reflective surfaces) the
laser in the eyes.
• Change the batteries when the indicator blinks.
• Do not use the thermometer around explosive gas, vapor or dust
• Do not leave the device with the lock on (lock at the top right of the
screen) because in this configuration, the instrument does not turn
off automatically.
To prevent damage on your instrument or equipment please
carefully respect these conditions :
non
A protéger des champs
électriques et magnétiques et
de l'électricité statique
To protect from electric and
magnetic fields of static
electricity
Protect from thermal
shock
Maintenance
To install or change the 9V battery, open the part near the trigger
and put it in the battery compartment.
Infrared thermometers can measure the surface temperature of an
object. Its optic lens catches the energy emitted and reflected by the
object. This energy is collected and focused onto a detector. This
information is displayed as temperature. The laser pointer is only used to
aim at the target.
Laser sighting
Infrared sensor
Emitted energy by the object
in the form of radiation
Infrared thermometer, how does it works?