| Feature | Brainsight NIRS | Brainsight NIRS-8 |
|---|---|---|
| Number of detectors | 8-32 | 8 |
| Number of detectors dedicated to proximity measurements | 4-16 | 4 |
| Detector type | Si APD (cortical detectors) Si photodiode (proximity detectors) | Si APD (cortical detectors) Si photodiode (proximity detectors) |
| Emitter type | Laser diode | Laser diode |
| Number of source optodes | 4-16 (could do 24) | 4 (could do 6) |
| Typical number of channels (source-detector pairs) | 72 | 18 |
| Number of wavelengths per optode | 2-3 | 2-3 |
| Supported wavelengths | 705nm 830nm * Other configurations available on demand | 705nm 830nm * Other configurations available on demand |
| Sensitivity | < 0.5pW (cortical detectors) < 1pW (proximity detectors) | < 0.5pW (cortical detectors) < 1pW (proximity detectors) |
| Dynamic range | > 100dB @20Hz (cortical detectors) > 90dB @20Hz (proximity detectors) * Extra 37dB with gain adjustment. | > 100dB @20Hz (cortical detectors) > 90dB @20Hz (proximity detectors) * Extra 37dB with gain adjustment. |
| Modulation | FDMA | FDMA |
| Real time data display | Yes | Yes |
| Maximum power | 10mW / wavelength (mean) | 10mW / wavelength (mean) |
| Sampling rate | 1-100Hz (up to 64 pairs, 128 pairs @50Hz) | 1-100Hz (up to 64 pairs, 128 pairs @50Hz) |
| Host connection | Ethernet (possibility of multiple clients) | Ethernet (possibility of multiple clients) |
| Interlock | Yes | Yes |
| Exported file format | .nirs (HomER) | .nirs (HomER) |
| Number of auxiliary channels | 8 (TTL or analog inputs). | 8 (TTL or analog inputs). |
| Trigger out. | 1 | 1 |
| Auxiliary sampling rate | 1-8000Hz | 1-8000Hz |
| Optode height | ~7mm | ~7mm |
| Optical fibre length | 3m standard * Custom length on demand. | 3m standard * Custom length on demand. |