# Masimo MightySat Rx (Bluetooth LE) vs Zacurate Pro Series 500DL: specs and price compared

A sourced, side-by-side comparison of the Masimo MightySat Rx (Bluetooth LE) (Masimo) and Zacurate Pro Series 500DL (Zacurate) among pulse oximeters. Zacurate Pro Series 500DL is the cheaper of the two at $19.99.

## Side by side

| Spec | Masimo MightySat Rx (Bluetooth LE) | Zacurate Pro Series 500DL |
| --- | --- | --- |
| US price | $549 | $19.99 |
| Brand | Masimo | Zacurate |
| Spo2 range | 0-100% | 0-100% |
| Spo2 accuracy percent | 70-100% Arms: ±2% no motion, ±3% motion, ±2% low perfusion | ±2% (70-99%) |
| Pulse rate range bpm | 25-240 bpm | 25-250 bpm |
| Display type | Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator | LED numeric display |
| Perfusion index | Yes | No |
| Continuous monitoring | No | No |
| Bluetooth | Yes | No |
| Battery life hr | 15 | 35 |

## Key differences

- Spo2 accuracy percent: Masimo MightySat Rx (Bluetooth LE) 70-100% Arms: ±2% no motion, ±3% motion, ±2% low perfusion vs Zacurate Pro Series 500DL ±2% (70-99%)
- Pulse rate range bpm: Masimo MightySat Rx (Bluetooth LE) 25-240 bpm vs Zacurate Pro Series 500DL 25-250 bpm
- Display type: Masimo MightySat Rx (Bluetooth LE) Rotating, adjustable 3.3 cm color display with pleth waveform and Signal IQ indicator vs Zacurate Pro Series 500DL LED numeric display
- Perfusion index: Masimo MightySat Rx (Bluetooth LE) Yes vs Zacurate Pro Series 500DL No
- Bluetooth: Masimo MightySat Rx (Bluetooth LE) Yes vs Zacurate Pro Series 500DL No
- Battery life hr: Masimo MightySat Rx (Bluetooth LE) 15 vs Zacurate Pro Series 500DL 35

## Sources

- Masimo MightySat Rx (Bluetooth LE): https://www.cardiacdirect.com/product/masimo-mightysat-rx-fingertip-pulse-oximeter/ (cardiacdirect.com, verified 2026-08-01)
- Zacurate Pro Series 500DL: https://zacurate.com/products/500dl-fingertip-pulse-oximeter-black (zacurate.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/pulse-oximeters/masimo-mightysat-rx-vs-zacurate-pro-series-500dl/
Cite: Per The Front Desk Review, Masimo MightySat Rx (Bluetooth LE) ($549) vs Zacurate Pro Series 500DL ($19.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/pulse-oximeters/masimo-mightysat-rx-vs-zacurate-pro-series-500dl/
License: CC BY 4.0.