Thermal Imaging is Non Destructive Testing based on Heat Emission. This technique is used to detect variations in infrared radiation emitted of a surface. This data can produce images called thermographs that are based on the temperature of the objects. This type of testing has the advantage that large number of surface temperature data can be collected without disrupting the test. The data collected allows a quick understanding of the relative performance of the system being tested. Each pixel of a thermograph has a temperature value and the image contrast is derived from differences in surface temperature. The contrast can be increased in some cases by creating a noticeable thermal difference between the back and front side of the specimen.
The temperature gradients are displayed on a T.V screen. The equipment is portable and permanent records can be made. Testing can be done without direct access to surface and large areas can be rapidly inspected using infrared cameras.
 | Electric / Mechanical / Steam systems
Electrical and mechanical systems are the core of many manufacturing operations. An unexpected shutdown of even a minor piece of equipment could have a major impact on production. Since nearly everything gets hot before it fails, thermal inspection is a valuable and cost-effective diagnostic tool with many industrial applications.
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| Building & Structural integrity
Thermography is an excellent tool for monitoring the performance of building envelopes. The technique provides visual information on hidden structural elements aiding the determination of their condition and the overall structure integrity.
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| Leak testing
Thermal imaging is used to survey pipelines in chemical plants, water supply systems, steam lines, natural gas pipelines and sewer systems. Its non-contact, nondestructive ability to inspect large areas with 100% coverage and to locate subsurface leaks as well as the additional capability to locate voids and erosion surrounding pipelines make its testing capabilities unique.
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