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| Cost [$] | Read range | User identif. | Precision /accuracy | Environ. effect | |
|---|---|---|---|---|---|
| WED | (scan) 200–500 | 20 cm | yes | 0.3/0.6 °C | Low |
| eWTS[5] | \ | 1-3 cm | yes | 0.08 °C | Low |
| Infrared | 100 | 10 cm | no | 0.2 °C | High |
| Th.Cam | 15,000 | 1–2 m | perhaps | ±1 °C | Medium |
