Masimo
Masimo MightySat Rx (Bluetooth LE)
$549
Best Pulse Oximeters · head-to-head
Masimo MightySat Rx (Bluetooth LE) vs Contec CMS50D
A sourced, side-by-side comparison. Contec CMS50D is cheaper at $8.99. Every spec and price links to its source.
Contec Medical Systems
Contec CMS50D
$8.99Cheaper
Which is better: the Masimo MightySat Rx (Bluetooth LE) or Contec CMS50D?
On the specs we track, they're closely matched. The Contec CMS50D is the cheaper at $8.99.
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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) | Contec CMS50D |
|---|---|---|
| US price | $549 | $8.99 |
| Brand | Masimo | Contec Medical Systems |
| Released | — | — |
| Spo2 range | 0-100% | 0-100% |
| Spo2 accuracy percent | 70-100% Arms: ±2% no motion, ±3% motion, ±2% low perfusion | ±2% (70-100%); ±4% under weak/low-perfusion signal conditions |
| Pulse rate range bpm | 25-240 bpm | 30-250 bpm |
| Display type | Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator | LED display |
| Perfusion index | Yes | No |
| Continuous monitoring | No | No |
| Bluetooth | Yes | No |
| Battery life hr | 15 | 24 |
Sources — Masimo MightySat Rx (Bluetooth LE): cardiacdirect.com (verified 2026-08-01). Contec CMS50D: contecmedsystems.com (verified 2026-08-01).
What's the difference between the Masimo MightySat Rx (Bluetooth LE) and Contec CMS50D?
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 Contec CMS50D ±2% (70-100%); ±4% under weak/low-perfusion signal conditions
- Pulse rate range bpm: Masimo MightySat Rx (Bluetooth LE) 25-240 bpm vs Contec CMS50D 30-250 bpm
- Display type: Masimo MightySat Rx (Bluetooth LE) Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator vs Contec CMS50D LED display
- Perfusion index: Masimo MightySat Rx (Bluetooth LE) true vs Contec CMS50D false
- Bluetooth: Masimo MightySat Rx (Bluetooth LE) true vs Contec CMS50D false
- Battery life hr: Masimo MightySat Rx (Bluetooth LE) 15 vs Contec CMS50D 24