Many maintenance shops now own thermographic cameras. In the early days of thermography, the equipment was bulky and expensive. Today's devices are affordable and easy to carry. As good as today's thermographic cameras are, it's important to understand that they don't actually do thermography. They are tools a thermographer uses.
If you don't have a trained thermographer on staff, consider sending someone to thermography school or having several maintenance techs attend classes held at your facility. Some of the things a thermographer must know include:
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