Thermography - Qualitative VS Quantitative

Posted by Kyle Skelson on

Qualitative Surveys

Qualitative thermal surveys are the more basic option of the two inspection types, however they are still a great tool in determining defects or anomalies within a multiple of building or electrical scenarios.

Qualitative surveys do not involve the recording or taking of any formal temperature measurements, instead they rely on the analysis of thermal images by a trained individual. 

The easiest way to explain this is with a simple example, imagine that an internal wall shows a darker blue area, what this indicates is that the area’s surface is cooler than its surroundings, there are multiple reasons that this could be occurring from missing insulation, dampness to even structural thermal bridging. This is where all of the likely causes need to be considered and assessed by a trained thermographer.


Quantitative Surveys

Quantitative thermal surveys are the more advanced option when it comes to thermographic surveys, this is because this type of survey involves the recording of accurate temperature measurements. When recording temperature measurements with a thermal cameras there are a multitude of factors that need to be considered and adjusted for in order to achieve accurate temperatures, this can range from exitant radiation, which is the radiation emitted from everything in the world around us that has a temperature above -273° C all the way to the emissivity of a particular object. It is because of this that some form of thermal training is necessary for anybody looking to get into thermography. 


Regardless of what kind of thermal study you're looking to perform, it all starts with selecting the appropriate camera for the job. Here at Surveytech we have access to the entire range of Teledyne Flir cameras so no matter what you need we've got you covered. Whether you're looking to purchase a camera or would like to have a thermal study performed, here at Surveytech we've got you covered. Get in touch today to discuss any of your thermal requirements.


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