Emissivity - Amprobe IR-500 Manual De Uso

2. The unit cannot measure through transparent
surfaces such as glass. Remove the barrier between
the unit and the target surface.
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 unit's optics

Emissivity

Most organic materials and painted or oxidized surfaces
have an emissivity of 0.95 (pre-set in the unit). Inaccurate
readings will result from measuring shiny or polished
metal surfaces. To compensate, cover the surface to be
measured with masking tape or flat black paint. Allow
time for the tape to reach the same temperature as the
material underneath it. Measure the temperature of the
tape or painted surface.
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