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  Limits of Infra Red thermal sensing
  Posted by: plaidpaddler on May-06-13 7:50 PM (EST)

Infrared Sensors work best with black body, carbon structures. They work poorly with shiny metal surfaces and liquid surfaces. For copper tubing its always best to color the surface with a black grease pen. For liquids they are just poor. Best to shoot the same flat object submerged in the liquid long enough to reach water temperature.
Every year I have people concerned that their domestic hot water system is faulty because their Infra-red thermometer is showing different temperatures all over their piping system. The Rocket Scientists at MIT that designed the early and expensive Micro-Scanner supplied a Nisan black grease pencil with each unit and detailed directions on using it with different materials. Directions more detailed than those supplied by Harbor Freight and others.

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