Masimo
Masimo MightySat Rx (Bluetooth LE)
$549
Best Pulse Oximeters · head-to-head
Masimo MightySat Rx (Bluetooth LE) vs Nonin Onyx Vantage 9590
A sourced, side-by-side comparison. Nonin Onyx Vantage 9590 is cheaper at $199. Every spec and price links to its source.
Nonin Medical
Nonin Onyx Vantage 9590
$199Cheaper
Which is better: the Masimo MightySat Rx (Bluetooth LE) or Nonin Onyx Vantage 9590?
On the specs we track, they're closely matched. The Nonin Onyx Vantage 9590 is the cheaper at $199.
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Masimo MightySat Rx (Bluetooth LE) | Nonin Onyx Vantage 9590 |
|---|---|---|
| US price | $549 | $199 |
| Brand | Masimo | Nonin Medical |
| Released | — | — |
| Spo2 range | 0-100% | 0-100% |
| Spo2 accuracy percent | 70-100% Arms: ±2% no motion, ±3% motion, ±2% low perfusion | 70-100% Arms ±2 digits (finger/thumb, no motion); toe accuracy ±2 (70-90%) / ±3 (90-100%) |
| Pulse rate range bpm | 25-240 bpm | 18-321 bpm display; declared accuracy 20-250 bpm ±3 digits (40-240 bpm ±3 digits low perfusion) |
| Display type | Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator | Numeric LED display with tricolor pulse-quality indicator |
| Perfusion index | Yes | No |
| Continuous monitoring | No | No |
| Bluetooth | Yes | No |
| Battery life hr | 15 | 36 |
Sources — Masimo MightySat Rx (Bluetooth LE): cardiacdirect.com (verified 2026-08-01). Nonin Onyx Vantage 9590: nonin.com (verified 2026-08-01).
What's the difference between the Masimo MightySat Rx (Bluetooth LE) and Nonin Onyx Vantage 9590?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Spo2 accuracy percent: Masimo MightySat Rx (Bluetooth LE) 70-100% Arms: ±2% no motion, ±3% motion, ±2% low perfusion vs Nonin Onyx Vantage 9590 70-100% Arms ±2 digits (finger/thumb, no motion); toe accuracy ±2 (70-90%) / ±3 (90-100%)
- Pulse rate range bpm: Masimo MightySat Rx (Bluetooth LE) 25-240 bpm vs Nonin Onyx Vantage 9590 18-321 bpm display; declared accuracy 20-250 bpm ±3 digits (40-240 bpm ±3 digits low perfusion)
- Display type: Masimo MightySat Rx (Bluetooth LE) Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator vs Nonin Onyx Vantage 9590 Numeric LED display with tricolor pulse-quality indicator
- Perfusion index: Masimo MightySat Rx (Bluetooth LE) true vs Nonin Onyx Vantage 9590 false
- Bluetooth: Masimo MightySat Rx (Bluetooth LE) true vs Nonin Onyx Vantage 9590 false
- Battery life hr: Masimo MightySat Rx (Bluetooth LE) 15 vs Nonin Onyx Vantage 9590 36