ENERGY
ADE EASIER
RAPHY
quality lens made from Germanium with A camera with such good thermal
the best f number (f/1.0 ). This allows the resolution is sensitive enough to
maximum amout of energy emitted by the be used when there is less
object through to the detector. difference between the internal
We have talked a great deal about the and external temperatures of
number of pixels which you may think is the building. This means work
not that significant knowing that can be carried out during a
‘overresolution’ in the visual digital larger percentage of the year
camera market is hardly ever used. The leading to a shorter payback Just ask the specialists ...
situation with infrared cameras is different period of the equipment.
because the resolution is a lot lower due Using a quality
to the technology used in the detector, so thermographic camera and the
Infrared Thermography -
with infrared the pixel count is still very correct lens to cover the
Excellent Resolution for Building
important. Therefore using a camera of building or part of the building
Inspections
high resolution makes it possible to of interest and having been
produce a highquality report with clear focussed correctly will produce
images (see Figures 4-7). a quality thermogram. But the
N
up to
E
W
However it is not just the geometric job does not finish there as it is
1,280 x 960
resolution that is important. To be able to essential to have good
infrared pixels
obtain quality measurements you also analytical software to analyse
need a good thermal resolution. This is the image and produce a
especially true for building inspections quality report. Having the right
because you are trying to detect small tools available in the software
temperature differences. Although building make report generation easier
VarioCAM
®
high resolution
www.new-thermography.com
thermography is normally carried out at and more effective (see Figure
times of the year when the greatest 8). Some tools that should be
difference between internal and external available are regions of
temperatures is available the difference in interest, isotherms (areas of the
temperature between an area with a fault same temperature) and
and an area without a fault is very small. different colour palettes to
Zoom
Therefore a camera with the capability for name just a few. Following
differentiating between temperatures as analysis of the thermogram a
small as 0.05°C is useful. This capability is report can be written including
also known as ‘Noise Equivalent all the results of the analysis
Temperature Difference’ (NEDT). The indicating what action should
smaller the NETD the better is the quality be taken and where.
of the measurement and image obtained.
Complete Thermographic
Solutions
InfraTec
Infrared Sensor and Measurement Technology Ltd.
Dunston Innovation Centre
Dunston Road
&KHVWHU�HOG61*8QLWHG.LQJGRP
SKRQH
ID[
e-mail thermo@InfraTec.co.uk
www.InfraTec.net
Figure 8: Screenshot of analysing software
SUSTAINABLE FM | OCTOBER 2007
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