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Ancel,
In the Harbor Freight laminator, the rollers are almost completely surrounded by an aluminum structure that contains the heaters, and radiates the heat to the rollers. I have two non contact IR thermometers, one with a 1:8 ratio, and one with a 1:1 ratio. even the 1:1 unit has too wide a field to read the roller temperature through the narrow slots on the structure. My contact method shows that the structure is about 20°C hotter than the rollers. So, while the non contact method rules, it is not a general solution.Non contact passive infrared rules...
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