# iHealth Air PO3M vs Contec CMS50D: specs and price compared

A sourced, side-by-side comparison of the iHealth Air PO3M (iHealth Labs) and Contec CMS50D (Contec Medical Systems) among pulse oximeters. Contec CMS50D is the cheaper of the two at $8.99.

## Side by side

| Spec | iHealth Air PO3M | Contec CMS50D |
| --- | --- | --- |
| US price | $69.99 | $8.99 |
| Brand | iHealth Labs | Contec Medical Systems |
| Spo2 range | 70-99% | 0-100% |
| Spo2 accuracy percent | ±2% (70-99%) | ±2% (70-100%); ±4% under weak/low-perfusion signal conditions |
| Pulse rate range bpm | 30-250 bpm | 30-250 bpm |
| Display type | Bright LED numeric display | LED display |
| Perfusion index | — | No |
| Continuous monitoring | No | No |
| Bluetooth | Yes | No |
| Battery life hr | — | 24 |

## Key differences

- Spo2 range: iHealth Air PO3M 70-99% vs Contec CMS50D 0-100%
- Spo2 accuracy percent: iHealth Air PO3M ±2% (70-99%) vs Contec CMS50D ±2% (70-100%); ±4% under weak/low-perfusion signal conditions
- Display type: iHealth Air PO3M Bright LED numeric display vs Contec CMS50D LED display
- Bluetooth: iHealth Air PO3M Yes vs Contec CMS50D No

## Sources

- iHealth Air PO3M: https://support.ihealthlabs.com/hc/en-us/articles/8499453953677-FAQ-Technical-Specifications-for-the-iHealth-Air-Wireless-Pulse-Oximeter-PO3 (support.ihealthlabs.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/ihealth-air-po3m-vs-contec-cms50d/
Cite: Per The Front Desk Review, iHealth Air PO3M ($69.99) vs Contec CMS50D ($8.99) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/pulse-oximeters/ihealth-air-po3m-vs-contec-cms50d/
License: CC BY 4.0.