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| Working principle | Invasive or non-invasive | Sensitivity | Ref. |
|---|---|---|---|
| Microfluidic | Invasive | 137 μm mmHg−1 | 9 |
| Capacitive | Invasive | 15 kHz mmHg−1 | 10 |
| Capacitive | Invasive | 160 kHz mmHg−1 | 11 |
| Capacitive | Non-invasive | 32 kHz mmHg−1 | 12 |
| Inductive | Non-invasive | 8 kHz mmHg−1 | 13 |
| Piezo-resistive | Non-invasive | 1.5 Ω mmHg−1 | 14 |
| Piezo-resistive | Non-invasive | ∼0.025 Ω mmHg−1 | 15 |
| Piezo-resistive | Non-invasive | 8.37 μV mmHg−1 | 16 |
| Piezo-resistive | Non-invasive | 20 μV mmHg −1 | This work |
