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Magnetic Sensors
Comparison of different magnetic sensors
| Type |
Frequency (Hz) |
Field Range(Tesla) |
sensitivity |
|
Noise |
Noise
Am-1/Hz½ |
| Coil (air core) |
10-3 – 109 |
10-10 –102 |
DΦ/dt |
Discrete |
0.1pT/Hz½ |
10-7 |
| Fluxgate |
DC - 103 |
10-10 - 10-3 |
H |
Discrete |
10pT/Hz½ |
10-5 |
| Hall |
DC - 105 |
10-5 - 1 |
B |
Thin Film |
100nT/Hz½ |
10-1 |
| Magnetoresistive (MR) |
DC |
10-2 - 10 |
B2 |
Thin Film |
10nT/ Hz½ |
10-2 |
| Anisotropic Magnetoresistive (AMR) |
DC - 107 |
10-9 - 10-3 |
H |
Thin Film |
10nT/ Hz½ |
10-2 |
| Giantmagnetoresistive (GMR) |
DC - 108 |
10-9 - 10-2 |
H |
Thin Film |
10nT/ Hz½ |
10-2 |
| Magneto-Optic (MO) |
DC - 108 |
10-5 -102 |
M |
Discrete |
1pT/ Hz½ |
10-6 |
| Superconducting Quantum
Interference Device (SQUID) (LT) |
DC - 109 |
10-15 - 10-2 |
Φ |
Thin Film |
1fT/ Hz½ |
10-9 |
| SQUID (HT |
DC - 104 |
10-15 - 10-2 |
Φ |
Thin Film |
30fT/Hz½ |
10-8 |
| Nuclear Magnetic Resonance (NMR) |
DC - 102 |
10-10 - 10 |
|H| |
Discrete |
1nT/Hz½ |
10-3 |
| Mixed sensors |
DC - 106 |
10-15 - 10-6 |
Φ |
Thin film |
<30fT/ Hz½ |
10-9 |
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