# Zacurate Pro Series 500DL vs Contec CMS50D: specs and price compared

A sourced, side-by-side comparison of the Zacurate Pro Series 500DL (Zacurate) and Contec CMS50D (Contec Medical Systems) among pulse oximeters. Contec CMS50D is the cheaper of the two at $8.99.

## Side by side

| Spec | Zacurate Pro Series 500DL | Contec CMS50D |
| --- | --- | --- |
| US price | $19.99 | $8.99 |
| Brand | Zacurate | Contec Medical Systems |
| Spo2 range | 0-100% | 0-100% |
| Spo2 accuracy percent | ±2% (70-99%) | ±2% (70-100%); ±4% under weak/low-perfusion signal conditions |
| Pulse rate range bpm | 25-250 bpm | 30-250 bpm |
| Display type | LED numeric display | LED display |
| Perfusion index | No | No |
| Continuous monitoring | No | No |
| Bluetooth | No | No |
| Battery life hr | 35 | 24 |

## Key differences

- Spo2 accuracy percent: Zacurate Pro Series 500DL ±2% (70-99%) vs Contec CMS50D ±2% (70-100%); ±4% under weak/low-perfusion signal conditions
- Pulse rate range bpm: Zacurate Pro Series 500DL 25-250 bpm vs Contec CMS50D 30-250 bpm
- Display type: Zacurate Pro Series 500DL LED numeric display vs Contec CMS50D LED display
- Battery life hr: Zacurate Pro Series 500DL 35 vs Contec CMS50D 24

## Sources

- Zacurate Pro Series 500DL: https://zacurate.com/products/500dl-fingertip-pulse-oximeter-black (zacurate.com, verified 2026-08-01)
- Contec CMS50D: https://www.contecmedsystems.com/showroom/contec-cms50d-fingertip-pulse-oximeter-spo2-sensor-ce-and-fda-approved.html (contecmedsystems.com, verified 2026-08-01)

Canonical: https://frontdeskreview.com/gear/pulse-oximeters/zacurate-pro-series-500dl-vs-contec-cms50d/
Cite: Per The Front Desk Review, Zacurate Pro Series 500DL ($19.99) vs Contec CMS50D ($8.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/pulse-oximeters/zacurate-pro-series-500dl-vs-contec-cms50d/
License: CC BY 4.0.