There’s a simple answer and some detailed ones
A. Simple Answer:
Because there’s just no other way to get the data or Image.
Period. End of story.
B. Three Not-So-Simple Answers:
Basically because they are often the only practical methods of getting reliable temperature and/or temperature distribution measurements:
- The object is so fragile or subject to contamination that one cannot touch it for any reason, like a semiconductor undergoing construction or, more critically,in development or testing.
- To touch the object would change the temperature distribution that one is attempting to determine, such as an object being laser heated – a contact sensor would be either in the way or heat up differently.
- When the object of measurement would destroy a contact sensor because it too caustic or too hot or too cold, or in an intense RF field or at a high voltage etc.
C. Three best reasons
Times and places where noncontact techniques are more accurate & reliable than contact methods
- For instance, measuring the temperature of a 2000 °F Steel rod or billet or slab or sheet passing at 5 to 30 miles per hour, or any moving object.
- No other temperature measurement method can faithfully follow the time-temperature properties of an object undergoing very rapid heating or cooling. This area also requires a very fast-responding camera or thermometer.
- The object to be measured cannot be reached, like being too far away such as the surface of a star or a planet or asteroid, or in a controlled environment such as a vacuum chamber.
Noncontact thermometry and quantitative infrared thermography are very well proven technologies that have a great deal of applications learning associated with them, for more than 40 years.
Why have to “reinvent the wheel”, so to speak, when others have already solved many of the applications problems?
Three other resources for you:
- Search our archives here for details and links to application success stories
- Stay up to date with the latest news on thermal Infrared measurements and equipment at iThermographer.com and www.TempSensorNEWS.com.
- Get a better idea of what emissivity (emittance) is and where and how to find, use and measure (if necessary) the best values at www.SpectralEmissivity.com