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Tool for Measuring Reflected Temperature

In order to measure reflected temperature, thermographers often utilize a piece of aluminum foil that has been crumpled, re-flattened, and wrapped around a piece of cardboard. The crumpling of the aluminum foil creates multiple angles on the foil surface necessary to measure an average reflected temperature which is entered into the radiometer’s computer.

Using a crumpled foil reflector raises a couple of concerns. Firstly, the aluminum foil is conductive and possibly an arc hazard when working near energized electrical equipment. Secondly, the reflector is often thrown away at the end of each job requiring that a new one be made for the next project.

Here is a small and versatile solution that you can add to your tool kit.

• Cut out a small piece of cardboard the size of an ID card
• Crumple and re-flatten a piece of aluminum foil and wrap around the cardboard
• Acquire a blank ID card holder with a slot for a lanyard holder
• Cut a small a 1”x 1.5” rectangle in the center of the front face
• Seal completed reflector into ID card holder with crumpled foil visible though rectangular opening
• Attach a nonconductve safety lanyard to help prevent dropping

This provides a permanent and inexpensive tool for measuring reflected temperature. For safety, do not let this tool hang from around your neck or otherwise dangle from your body. Always keep reflector tool in a secure location that protects the foil surface when not in use.

Tip and images provided by:
Harley Denio, Oregon Infrared
503-628-7212
PO Box 6252
Aloha, Oregon. 97007
www.oregoninfrared.com