Nonin Medical
Nonin Onyx Vantage 9590
$199
Best Pulse Oximeters · head-to-head
Nonin Onyx Vantage 9590 vs Zacurate Pro Series 500DL
A sourced, side-by-side comparison. Zacurate Pro Series 500DL is cheaper at $19.99. Every spec and price links to its source.
Zacurate
Zacurate Pro Series 500DL
$19.99Cheaper
Which is better: the Nonin Onyx Vantage 9590 or Zacurate Pro Series 500DL?
On the specs we track, they're closely matched. The Zacurate Pro Series 500DL is the cheaper at $19.99.
As an Amazon Associate we earn from qualifying purchases. Prices verified at capture; live price may differ.
Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Nonin Onyx Vantage 9590 | Zacurate Pro Series 500DL |
|---|---|---|
| US price | $199 | $19.99 |
| Brand | Nonin Medical | Zacurate |
| Released | — | — |
| Spo2 range | 0-100% | 0-100% |
| Spo2 accuracy percent | 70-100% Arms ±2 digits (finger/thumb, no motion); toe accuracy ±2 (70-90%) / ±3 (90-100%) | ±2% (70-99%) |
| Pulse rate range bpm | 18-321 bpm display; declared accuracy 20-250 bpm ±3 digits (40-240 bpm ±3 digits low perfusion) | 25-250 bpm |
| Display type | Numeric LED display with tricolor pulse-quality indicator | LED numeric display |
| Perfusion index | No | No |
| Continuous monitoring | No | No |
| Bluetooth | No | No |
| Battery life hr | 36 | 35 |
Sources — Nonin Onyx Vantage 9590: nonin.com (verified 2026-08-01). Zacurate Pro Series 500DL: zacurate.com (verified 2026-08-01).
What's the difference between the Nonin Onyx Vantage 9590 and Zacurate Pro Series 500DL?
Where the two actually differ on the specs we track (4 of 8). Matching specs are omitted.
- Spo2 accuracy percent: Nonin Onyx Vantage 9590 70-100% Arms ±2 digits (finger/thumb, no motion); toe accuracy ±2 (70-90%) / ±3 (90-100%) vs Zacurate Pro Series 500DL ±2% (70-99%)
- Pulse rate range bpm: Nonin Onyx Vantage 9590 18-321 bpm display; declared accuracy 20-250 bpm ±3 digits (40-240 bpm ±3 digits low perfusion) vs Zacurate Pro Series 500DL 25-250 bpm
- Display type: Nonin Onyx Vantage 9590 Numeric LED display with tricolor pulse-quality indicator vs Zacurate Pro Series 500DL LED numeric display
- Battery life hr: Nonin Onyx Vantage 9590 36 vs Zacurate Pro Series 500DL 35