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A comparison between types of magnetic sensors.
| Sensor | Quantum effect | Array config. | Portability | Frequency range | Limit of detection | Size | Cost |
|---|---|---|---|---|---|---|---|
| SQUID (Körber et al., 2016) | Superconduction effect | Yes | No | DC-100 kHz | Femto-atto Tesla | m3 | Ultra-high |
| OPM (Gutteling et al., 2023) | Zeeman effect | Yes | Yes | 2 kHz | Pico-femto Tesla | cm3 | High |
| NV (Webb et al., 2021) | Photoluminescence | No | No | DC-kHz | Pico Tesla | ×10 cm3 | Not commercialized |
| TMR (Zuo et al., 2020) | Spintronics | Yes | Yes | DC-GHz | Pico Tesla | mm3 | Low |
