CMS50M Blue Fingertip Pulse Oximeter: Precise SpO2 & Pulse Rate Monitoring

The CMS50M is a compact, non-invasive fingertip monitor that measures blood oxygen saturation (SpO2) and pulse rate (PR) with an LED display for quick insights. Designed for everyday use—whether you’re at home, in a clinic, at a gym, or on the go—it operates with two AAA batteries (not included), prioritizing portability without sacrificing essential accuracy.

Why this oximeter stands out

• via finger contact, giving you real-time visibility into your oxygen saturation and heart rate.
• so you can interpret trends at a glance during workouts or rest.
• thanks to a working current of ≤25 mA, enabling longer use between battery replacements.
• with BF (body float) applied parts for safe, localized measurement.
• (60 mm L × 34 mm W × 33 mm H) that fits easily in a pocket or bag.

Technical highlights you can rely on

• 0%–100%. Accuracy is typically ±2% in the 70%–100% range; readings below 70% are not specified by the manufacturer, so consider baseline measurements and clinical guidance for interpretation in lower ranges.
• 30 bpm–250 bpm. Accuracy: ±2 bpm or ±2%, whichever is greater; resolution of 1 bpm.
• In weak pulse-filling conditions (pulse-filling ratio as low as 0.4%), SpO2 readings may have up to ±4% error and PR up to ±2 bpm or ±2%, whichever is greater. The device maintains power efficiency and remains resilient to lighting variations, with deviations under man-made or indoor natural light staying within ±1% compared with dark-room readings.
• Requires two AAA batteries (not included); Safety classification: type BF applied part.
• 60 mm (L) × 34 mm (W) × 33 mm (H).

What’s included and how you’ll use it

• Standard accessories: a hanging rope and a user manual to get you started quickly.
• Ideal usage scenarios include high-altitude or plateau environments, home health monitoring, community healthcare settings, oxygen bars, fitness clubs, physical training facilities, and everyday family use.

Who should use the CMS50M

• Athletes and fitness enthusiasts tracking recovery, training intensity, and adaptation to training loads.
• Travelers and climbers who want quick insights into how altitude affects oxygen saturation.
• Caregivers and patients in home or clinical settings needing non-invasive, immediate SpO2 and heart-rate data.
• Anyone seeking a simple, portable device to establish a baseline reading when healthy and at rest, then monitor changes over time.

Important usage notes

Because SpO2 estimation can be influenced by skin pigmentation and other physiological factors, it’s recommended to establish a baseline value when you are at rest and healthy. When interpreting readings, consult a licensed healthcare professional to understand how any individual traits may affect the measurement in your context.

Tips for best results

• Warm and clean the finger; remove nail polish or artificial nails if possible for a steadier signal.
• Keep still during measurement to minimize motion artifact.
• Use at rest to establish baseline SpO2 and PR, then monitor changes during activity or sleep.

With the CMS50M Blue Fingertip Pulse Oximeter, you gain a precise, portable tool that blends reliable physiology with practical, real-world use—helping you monitor your oxygenation and heart rate confidently wherever life takes you.