| Accuracy | ±1°C (2°F): 10 to 30°C (50 to 86°F) |
|---|---|
| Repeatability | ±0.5% of reading or < ±1°C (±2°F) |
| Emissivity | Pre-set 0.95 |
| Optical Resolution | 10:1 (Distance to Spot Size) |
| Spectral Response | 6.5–18µm |
| Response Time | <500 mSec, 95% response |
| Resolution | 0.2ºC (0.5ºF) |
| Temperature Range | -30 to 500°C (-20 to 932°F) |
| Rest of Range | ±1.5% of reading or ± 1.5°C (3°F) |
| Selectable | ºC or ºF |
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Emissivity is the measurement of a substance capacity to emit infrared energy. The emitted energy also reveals the object's temperature. Emissivity is measured by a value from 0 to 1. Where zero is equal to a shiny mirror and 1.0 is a blackbody. Based on the data we have, the Raytek MT6U has a fixed preset to 0.95 emissivity.
The emissivity of skin is typically 0.98 and as your thermometer has is fixed to 0.95 the reading would be off. Because emissivity changes with temperature and surface finish the 0.98 ok skin is simply a guideline.
