Determination of thermal emissivities within seconds/EMISSIVITY MEASURE

The TIR 100-2 measures thermal
emissivities of surfaces within some few
seconds. The measurement can be
performed directly at the original part
and even structured and curved
surfaces can be measured. The
instrument contains all operating
elements and electronic components
for the measuring and processing of the
sensor signals and their display, as well as
for the control of the black-body
temperature.

The TIR100-2 is the follow up device of
the known TIR100 for measuring thermal
emissivities of surfaces. We combined
the reliable technology of the TIR100
with highly integrated electronics and a
comfortable touch screen. The stand -
alone instrument is now more compact
and easier to use.
Inside a microcontroller regulates the
temperature of the radiator to a
constant value of T = 100°C. At the
same time the signal of the sensor is
registrated and converted by the help of
the stored standard values into an
absolute value of emissivity.
The large LED illuminated display shows
instrument status, measuring results and
operational menues. The touch screen
panel guarantees easy operation of all
functions.

The essential part of the instrument is the
half sphere shaped black body. Due to
its black coating the radiator has all the
properties of a nearly ideal 'black body'.
The radiator works at 100°C. The
remaining part of the black body
housing has been thermally insulated
against the radiator. There is a slight
heating of the device during operation.
The heating of the radiator is protected
against overheating with a reversible thermo-fuse, which will interrupt the heating at a temperature of 125°C.
The thermopile sensor changes the reflected thermal radiation into a voltage signal. The spectral distribution
of the thermal radiation is given by Planck's law of a black body at given temperature. More than 97 % of the
radiation energy is ranging in the wave length region between 2.5 μm and 40 μm.

Technical data
Measuring range < 0,020 … 0,980
Precision +- 0,002
Spectral range 2,5 μm - 40 μm
Maximum of radiative energy 8 μm
Black body temperature 100 °C
Intregration time 5 sec
Measuring spot ~5 mm
Power rating 130 W at 230 V~/115 V~ (opt.)
Size 230 mm x 140 mm x 120 mm
Weight 2,0 kg
Calibration standard low emissive side: Aluminum polished
high emissive side: black light trap
Reference emissivities typical value for low emissive side ~0,02
typical value for high emissive side ~0,98
individually calibrated with reference to a NPL calibration standard