Amprobe IR-710 Mode D'emploi page 15

2. The instrument cannot measure through transparent
surfaces such as glass. It will measure the surface
temperature of the glass instead.
3. Not recommended for use in measuring shiny or
polished metal surfaces (stainless steel, aluminum,
etc.). See Emissivity.
4. Steam, dust, smoke, etc., can prevent accurate
measurement by obstructing the instrument's optics.
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