Tag Archives: thermal imaging camera

Blog #055 – Your THERMOGRAPHY COMFORT LEVEL – Three modes of Heat Transfer. Think on a molecular level.

To be comfortable in using an infrared camera you must be very familiar with the three modes of heat transfer: conduction, convection, and thermal radiation.  I’ll use the glossary of the ASNT Nondestructive Testing HANDBOOK, Volume 3 Infrared and Thermal … Continue reading

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Blog #054 – Your THERMOGRAPHY COMFORT LEVEL – Steady state verses Transient heat transfer.

To be comfortable in using an infrared camera you need to be familiar with two types of heat transfer and three modes of heat transfer.  I’ll talk about the three modes of heat transfer (conduction, convection and radiation) in a … Continue reading

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Blog #053 – Your THERMOGRAPHY COMFORT LEVEL – Radiosity! What is it?

When you point your IR camera at a surface, infrared  energy waves are flooding into the detectors.  Some of the waves are a result of the emissivity of the material.  Some of the IR waves coming into your infrared camera … Continue reading

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Blog #052 – Your THERMOGRAPHY COMFORT LEVEL – Don’t forget! Emissivity is affected by angle of incidence.

You’ve heard that the higher the emissivity, the more accurate the temperature reading, right?  Right!  Paint has an emissivity of around 0.95.  Some surfaces are more specular and some are more diffuse.  Glass, for example has a high emissivity, around … Continue reading

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Blog #051 – Your THERMOGRAPHY COMFORT LEVEL – Will an Infrared camera locate …..? It depends!

Thermographers are often asked: “Will an Infrared camera see  ….  or locate…?  How about through walls?  Through clothes?  etc?  The answer to those questions is NO.  But some questions cannot be answered with a simple “yes” or “no”.  For example, … Continue reading

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Blog #050 – Your THERMOGRAPHY COMFORT LEVEL – Equilibrium is your enemy. Recognize it! Avoid it!

    Thermal imaging cameras can be used to locate unfilled cinder blocks.  The principle is thermal capacitance.  In the above images I used my Fluke IR Fusion camera at 7am, 10am and 2pm.  In the winter the sun rises … Continue reading

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Blog #049 – Your THERMOGRAPHY COMFORT LEVEL – Thermal capacitance and its use in thermography.

So I point my Fluke Ti32 IR camera down on a flat roof at 11pm on a clear night and there’s no wind.  I see warm areas and cool areas.  The moisture meter verifies the warm areas as moisture.  But … Continue reading

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Blog #048 – Your THERMOGRAPHY COMFORT LEVEL – 1st and 2nd Law of Thermodynamics! Why important?

There are two very important laws of thermodynamics all thermographers need to understand: the 1st Law and the 2nd Law.  And they are not difficult to understand. The 1st Law of Thermodynamics states that energy can be transformed or changed … Continue reading

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Blog #047 – Your THERMOGRAPHY COMFORT LEVEL –What is the difference in a night vision scope and an IR camera?

A night vision scope is not the same thing as a thermal imaging camera, although Hollywood seems to get them confused sometimes.  On the electromagnetic spectrum the energy waves in the visible light bandwidth run from 0.4 microns to 0.7 … Continue reading

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Blog #046 – Your THERMOGRAPHY COMFORT LEVEL – Why can’t my infrared camera see through glass?

Have you ever asked the question “Why can’t my infrared camera see through glass”?  First of all, let’s appreciate that IR cameras do not “see through” things.  The detectors in thermal imaging cameras “receive” energy waves that come from the … Continue reading

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