Pyrometers
Pyrometers are ideal for taking accurate measurements of
temperature without contact. Thanks to an optical
mechanism, these pyrometers are safe for measuring high
temperatures. Their infrared capabilities make them the
perfect tool to use when conventional sensor are
inadequate. This is in cases when the object is moving,
is extremely hot, in a difficult place to access or due
to contamination or other negative influences. A large
variety of handheld pyrometers are listed in the links
below. We are available to answer your queries about
pyrometers and the best one to suit your needs. They can
be calibrated to meet ISO standards, except the PCE-880
and PCE-888 pyrometers. If you don't find the pyrometers
you are looking for, please contact us and we will help
you find the best solution to suit your needs by calling
our German offices:
+49 (0)29 03 976 99-52;
our Italian offices:
+39 0583 975 114;
or our Spanish offices:
+34 967 543 548
and our technical staff will advise you
regarding our
products.
Technical specifications for our pyrometers can be
found at the following links:
-
PCE-IR10
series pyrometers
(digital infrared device with LCD for time duration
measurements of surfaces)
Pyrometers with adjustable K value (emissivity)
can be used for measuring the temperature of different
materials. Here you will find a
table with K values for a
diverse range of materials (the table can also be seen lower
down this page). All pyrometers are shipped calibrated. An
optional ISO calibration certificate (laboratory calibration
and certificate) can be acquired for all devices, except for
the PCE-880
and PCE-888 pyrometers. Below are some images of pyrometers
being used. Contact us if you have any questions: our German
offices:
+49 (0)29 03 976 99-52;
our Italian offices:
+39 0583 975 114;
or our Spanish offices:
+34 967 543 548.
Pyrometers for measuring
frozen goods
Measuring
a car motor
Pyrometers
for testing fuse boxes
Here you can see some images of pyrometers in use:
areas
of use for pyrometers.
The relationship between the diameter of the
measurement point and the distance of measurement (ratio)
is alwasys shown on the pyrometer in this way, 8:1, 12:1 or 35:1.
The diameter of the measurement point increases when
the distance from the pyrometer to the object being
measured increases. This means that the measurement
point can increase at long distances up to a
diameter of 25cm. The graphic that can be seen below
also shows this relationship. These pyrometers have,
at a short distance, a much more moderate
measurement point diameter, for example, at a
distance of 30cm the measurement point would be 6mm.
Such pyrometers are used for measuring temperature
of small areas at short distances.
Example of a surface being measured
with a ratio of distance to size of measurement point of 50 : 1
Emissivity depends on the wave length of what is being
measured. Please read the user's manual carefully to
know the wave length measured by the device you are
using.
Note: The values shown
below depend on the actual state of the material and the
measurement conditions.
Metallic materials
(table
with K values)
Material
Emissivity
1.0 µm
1.6 µm
8 - 14 µm
Aluminium
unoxidised
0.1 - 0,2
0.02 - 0.2
n/a
oxidised
0.4
0.4
0.2 - 0.4
A3003
alloy,
oxidised
n/a
0.4
0.3
rough
0.2 - 0.8
0.2 - 0.6
0.1 - 0.3
polished
0.1 - 0.2
0.02 - 0.1
n/a
Lead
polished
0.35
0.05 - 0.2
n/a
rough
0.65
0.6
0.4
oxidised
n/a
0.3 - 0.7
0.2 - 0.6
Chrome
0.4
0.4
n/a
Iron
oxidised
0.4 - 0.8
0.5 - 0.9
0.5 - 0.9
unoxidised
0.35
0.1 - 0.3
n/a
rusty
n/a
0.6 - 0.9
0.5 - 0.7
molten
0.35
0.4 - 0.6
n/a
Iron,
cast
oxidised
0.7 - 0.9
0.7 - 0.9
0.6 - 0.95
unoxidised
0.35
0.3
0.2
molten
0.35
0.3 - 0.4
0.2 - 0.3
Iron,
forged
uncut
0.9
0.9
0.9
Gold
0.3
0.01 - 0.1
n/a
Haynes
alloy
0.5 - 0.9
0.6 - 0.9
0.3 - 0.8
Inconel
oxidised
0.4 - 0.9
0.6 - 0.9
0.7 - 0.95
sand
blasted
0.3 - 0.4
0.3 - 0.6
0.3 - 0.6
electrically
polished
0.2 - 0.5
0.25
0.15
Copper
polished
n/a
0.03
n/a
alloy
n/a
0.05 - 0.2
n/a
oxidised
0.2 - 0.8
0.2 - 0.9
0.4 - 0.8
Magnesium
0.3 - 0.8
0.05 - 0.3
n/a
Bronze
polished
0.8 - 0.95
0.01 - 0.05
n/a
highly
polished
n/a
n/a
0.3
oxidised
0.6
0.6
0.5
Molybdenum
oxidised
0.5 - 0.9
0.4 - 0.9
0.2 - 0.6
unoxidised
0.25 - 0.35
0.1 - 0.35
Nickel
oxidised
0.8 - 0.9
0.4 - 0.7
0.2 - 0.5
electrolytic
0.2 - 0.04
0.1 - 0.3
n/a
Platinum
black
n/a
0.95
0.9
Mercury
n/a
0.05 - 0.15
n/a
Silver
n/a
0.02
n/a
Steel
cold-rolled
0.8 - 0.9
0.8 - 0.9
0.7 - 0.9
rough
n/a
n/a
0.4 - 0.6
polished
0.35
0.25
0.1
molten
0.35
0.25 - 0.4
n/a
oxidised
0.8 - 0.9
0.8 - 0.9
0.7 - 0.9
stainless
0.35
0.2 - 0.9
0.1 - 0.8
Titanium
polished
0.5 - 0.75
0.3 - 0.5
n/a
oxidised
n/a
0.6 - 0.8
0.5 - 0.6
Tungsten
n/a
0.1 - 0.6
n/a
polished
0.35 - 0.4
0.1 - 0.3
n/a
Zinc
oxidised
0.6
0.15
0.1
polished
0.5
0.05
n/a
Tin (unoxidised)
0.25
0.1 - 0.3
n/a
n/a = not available
Non-metallic
materials
Material
Emission
1.0 µm
5.0 µm
7.9 µm
8
- 14 µm
Asbestos
0.9
0.9
0.95
0.95
Asphalt
n/a
0.9
0.95
0.95
Basalt
n/a
0.7
0.7
0.7
Concrete
0.65
0.9
0.95
0.95
Ice
n/a
——
0.98
0.98
Earth
n/a
0.9 - 0.98
0.9 - 0.98
Paint (non alkaline)
——
0.9 - 0.95
0.9 - 0.95
Gypsum
n/a
0.4 - 0.97
0.8 - 0.95
0.8 - 0.95
Glass
plate
n/a
0.98
0.85
0.85
cast
n/a
0.9
n/a
n/a
Rubber
n/a
0.9
0.95
0.95
Wood (natural)
n/a
0.9 - 0.95
0.9 - 0.95
0.9 - 0.95
Calcium
carbonate
n/a
0.4 - 0.98
0.98
0.98
Carborundum
n/a
0.9
0.9
0.9
Ceramic
0.4
0.85 - 0.95
0.95
0.95
Gravel
n/a
0.95
0.95
0.95
Carbon
non
corroding
0.8 - 0.95
0.8 - 0.9
0.8 - 0.9
0.8 - 0.9
graphite
0.8 - 0.9
0.7 - 0.9
0.7 - 0.8
0.7 - 0.8
Paper (coloured)
n/a
0.95
0.95
0.95
Plastic
non
translucent
n/a
0.95
0.95
0.95
Fabric
n/a
0.95
0.95
0.95
Sand
n/a
0.9
0.9
0.9
Snow
n/a
——
0.9
0.9
Clay
n/a
0.85 - 0.95
0.95
0.95
Water
n/a
——
0.93
0.93
n/a = not available
General information about the
principal function of pyrometers: Infrared
radiation is an element of solar light that can be
seen when light is defracted through a prism. This
radiation contains energy. At the beginning of the
20th century, a group of scientists consisting of Planck, Stefan, Boltzmann, Wien
and Kirchhoff defined the activity of the
elecromagnetic spectrum and they established
equations describing infrared energy.
This allows the energy to be defined for pyrometers
taking into account the emissivity curves for dark
objects. Objects with a temperature higher than
absolute zero radiate energy. The amount of energy
increases in proportion to the fourth
magnitude.
This concept is the foundation for pyrometers. With
emissivity there is also a variable that takes into
account average temperature, and this can vary. The
emissivity factor is a measurement for the
relationship of radiation that a grey object and a
black object emit at the same temperature.
Pyrometers are produced in many configrations that
differ in optics, electronics, technology, size and
shape. All pyrometers have one thing in common: Todos los pirómetros
tienen algo en común: the channel for signal processing.
It starts with an IR signal, and ends with an
electronic output signal.
If you wish to view or
print a selection of pyrometers from our
catalogue, click the PDF symbol