Emissivity Helper + Confidence Meter
Pick a surface preset (or enter ε), add distance and viewing angle, then get a confidence score and field tips.
Presets are approximations—verify with field method when critical.
If using a preset, ε is filled automatically.
Longer distance → more atmosphere + smaller target pixels.
Near-grazing angles reduce reliability on shiny targets.
Selected ε
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Higher ε generally increases measurement reliability.
Confidence score
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Field tips
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Use tape/paint method on reflective targets when possible.