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The Contec CMS50D Pulse Oximeter is a portable, lightweight equipment adopting advanced, non-invasive technology. It is primarily designed to check blood oxygen saturation ($SpO_2$) and Pulse Rate ($PR$) values through the finger, providing a rapid, scientific means for quantitative measurement.
| Parameter | Details |
| Display Type | 0.96″ Dual-color OLED display (Blue and Yellow) |
| Screen Resolution | 128 x 64 pixels |
| $SpO_2$ Measurement Range | 0% to 100% (Resolution: 1%) |
| $SpO_2$ Accuracy | $\pm2\%$ between 70%–100%; unspecified below 70% |
| Pulse Rate (PR) Range | 30 bpm to 250 bpm (Resolution: 1 bpm) |
| Pulse Rate Accuracy | $\pm2$ bpm or $\pm2\%$ (whichever is greater) |
| Low Perfusion Performance | Accurate $SpO_2$ ($\pm4\%$) and PR ($\pm2$ bpm or $\pm2\%$) at a pulse-filling ratio of 0.4% |
| Power Supply | Two 1.5V AAA alkaline batteries |
| Working Voltage | DC 2.6V to 3.6V |
| Power Consumption | Less than 30 mA |
| Battery Life | Approximately 32 hours of continuous operation |
| Dimensions | 58.5 mm (L) $\times$ 31 mm (W) $\times$ 32 mm (H) |
Multi-Parameter Display: Displays $SpO_2$ value, Pulse Rate ($PR$) value, bar graph, and pulse waveform (plethysmograph).
Adjustable Interface: Features an automatic direction-changing display layout (screen rotation) for easier viewing.
Smart Indicator Systems: Includes a low-voltage power indication icon that alerts you before the unit works abnormally due to low power.
Energy Saver: Equipped with an automatic standby / auto power-off function that shuts down the device within seconds after the finger is removed.
Compact & Portable: Exceptionally small in volume, lightweight, and pocket-friendly, making it convenient to carry anywhere.
User-Friendly Operation: Features a simple one-button setup for quick, seamless, and immediate non-invasive fingertip readouts.
Ambient Light Resistance: Engineered to minimize light interference; deviation between darkroom measurements and indoor natural or man-made light is less than $\pm1\%$.
The CMS50D is widely applicable for non-continuous, spot-check monitoring in environments such as:
Home Healthcare: For everyday self-measurement and respiratory observation.
Medical Institutions: Used in community healthcare clinics, oxygen bars, and doctor's offices.
Fitness & Training: Ideal for fitness clubs, physical training rooms, sports recovery, and high-altitude/plateau area activities.
Contec CMS50D Pulse Oximeter Main Device
A Hanging Rope / Lanyard
User Manual
(Note: AAA batteries are sometimes bundled depending on the regional distributor pack).