Table 8.
Maximum permissible errors defined in different standards.
| Standards | Devices (Required Minimum Display Range) | Maximum Permissible Errors, in Specific Temperature Ranges | Accuracy Type (Laboratory/Clinical) | Note |
|---|---|---|---|---|
| IEC 80601-2-59: 2017 [30] | IRTs (None) |
±0.5 °C, 34.0–39.0 °C. | Laboratory | Errors from all the test devices are combined. |
| ISO 80601-2-56: 2017 [34] | clinical thermometers (34.0–43.0 °C) |
±0.3 °C, withing the rated output range; ±0.4 °C, withing the rated extended output range. |
Laboratory | This standard is under revision for improvement. |
| ASTM E1112-00: 2011 [58] | electronic thermometers (35.5–41.0 °C) |
±0.3 °C, < 35.8 °C; ±0.2 °C, 35.8–37.0 °C; ±0.1 °C, 37.0–39.0 °C; ±0.2 °C, 39.0–41.0 °C; ±0.3 °C, > 41.0 °C. |
Not clear | |
| ASTM E1965-98: 2016 [33] | IR thermometers (Ear canal: 34.4–42.2 °C; Skin: 22.0–40.0 °C) |
For ear canal IR thermometers: ±0.3 °C, < 36.0 °C; ±0.2 °C, 36.0–39.0 °C; ±0.3 °C, > 39.0 °C. For skin IR thermometers: ±0.3 °C, over the display range. |
Laboratory |