Finger Pulse Oximeter and LCD Heart Rate Monitor (CMS-50D)
Taking care of your health and monitoring your vital signs in a timely manner are key to a safe and worry-free daily life. The CMS-50D LCD Finger Pulse Oximeter and Heart Rate Monitor is a premium, highly accurate and completely non-invasive medical device designed for rapid diagnosis of blood oxygen saturation (SpO2) and heart rate measurement. Its exceptional accuracy, compact design and ease of use make this pulse oximeter an indispensable accessory for home medicine cabinets, travel or sports activities.
Whether you are facing health issues or simply want to be in control of your body during exercise, the CMS50D model allows you to obtain key data about your health status in just a few seconds. The device works in a non-invasive way, which means that the measurement is completely painless and safe for all age groups.
Why choose the CMS-50D pulse oximeter?
The saturation of oxygen in the blood (so-called saturation) is indicated by the symbol SpO2 and is expressed as a percentage. In a healthy person, normal values range between 93% and 99%. Drops below this limit can indicate serious health problems, so regular monitoring with a quality device is crucial. The CMS-50D pulse oximeter provides exceptional reliability even in more challenging conditions, such as low perfusion or darker skin tones, where other meters often fail.
Thanks to the advanced OLED color LCD display, you will read the results without any problems. The display allows you to set several different display modes and orientations (rotate the display with the press of a single button), which significantly facilitates the work of medical personnel or independent users.
Key advantages and benefits of using

Extremely fast measurement: Get accurate blood oxygen saturation and heart rate results in just about 7 seconds.
Three measurements with one button: The device simultaneously measures three vital parameters – oxygen saturation (SpO2), heart rate (PR) and perfusion index (PI).
Transparent OLED color LCD display: Provides crystal clear data display, graphical display of pulse (line graph) and plethysmographic graph (PLETH wave).
Flexible display: Wide range of display modes that can be easily changed by pressing the main button, allowing reading from any angle.
Compactness and portability: Due to its small size and extremely low weight, you can take the oximeter with you on trips, walks, sports training or travels.
Energy saving: The auto-off feature turns off the device after 5 seconds of inactivity, significantly extending battery life.

Technical specifications and features of the device
The CMS-50D (CMS50D) model is distinguished by superior technical features that ensure accuracy at the level of professional medical devices:

SpO2 measurement range: 0% - 100%
SpO2 measurement accuracy: ±2% for the range of 70% to 100% (not specified below 70%)
Heart rate measurement range: 30 bpm - 250 bpm (beats per minute)
Heart rate measurement accuracy: ±2 bpm or ±2% (whichever is greater)
Resolution: 1% for SpO2 and 1 bpm for heart rate
Low Perfusion Performance: Correct SpO2 and pulse rate display at 0.4% perfusion. SpO2 error rate is ±4% and pulse rate is ±2 bpm or ±2%.
Resistance to ambient light: Measurement deviation due to the influence of artificial or natural light is less than ±1%.
Optical sensor: Red light (wavelength 660 nm, power 6.65 mW) and infrared light (wavelength 880 nm, power 6.75 mW).
Power supply: 2 x 1.5V AAA alkaline batteries (not included).
Power consumption: Extremely low power consumption, less than 30 mA.
Auto power off: The device automatically turns off after 5 seconds when no finger is inserted.

Who is a pulse oximeter intended for?
The CMS-50D finger pulse oximeter is an indispensable medical device that is especially recommended for:

People with respiratory diseases (such as asthma, COPD, bronchitis),
Patients with cardiovascular diseases,
Individuals with high blood pressure (hypertension),
Diabetic patients (diabetes mellitus),
Patients who require constant care and regular monitoring of vital functions at home,
Athletes, mountaineers and physically active people who want to safely monitor the body's response to exertion or altitude differences.

If you are looking for a reliable, extremely accurate and affordable blood oxygen saturation and heart rate monitor, the CMS-50D model is an excellent and proven choice for every home.
Frequently Asked Questions (FAQ)
How do I use a finger pulse oximeter correctly?
It is extremely easy to use. Open the device (like a pincer), insert your index finger with the pad of your finger facing down towards the sensor, and press the power button. Stay still and do not move your arm during the measurement. The results (SpO2 oxygen saturation and heart rate) will appear on the screen in approximately 7 seconds.
What do the measured SpO2 values mean?
The SpO2 value shows the percentage of oxygen saturation in your blood. In a healthy person, normal values are between 93% and 99%. If the value falls below 92%, it is recommended to consult your doctor, as this may indicate a lack of oxygen in the body (hypoxia).
Does nail polish affect the accuracy of the measurement?
Yes, dark or thick nail polish and artificial nails can block the passage of red and infrared light through the finger to the optical sensor. To ensure maximum measurement accuracy, we recommend using the oximeter on a finger that does not have nail polish applied.


Responsible persons:
POWERMAT - PH Powermat TMK Bijak Sp., Jawna ul. Obrońców Poczty Gdańskiej 97, 42-400 Zawiercie, Poland, bok@powermat-hurt.pl (+48) 326703968
Distributor for Slovenia: Haloorodje.si, Online Sales, Rok Groznik sp, Podturn 42, 8350 Dolenjske Toplice, info@haloorodje.si, +38669731944, Slovenia
Product origin: China

Instructions for using the product:
• Before use, insert the batteries into the device and check the correct polarity.
• Press the power button and wait for the device to start up.
• Insert your finger into the oximeter opening with your nail facing the top of the sensor.
• Stay still and keep your arm as still as possible during the measurement.
• After a few seconds, the measured values (e.g. blood oxygen saturation and heart rate) are displayed on the LCD screen.
• After use, remove your finger from the device and turn it off.
• If necessary, clean the sensor before storage.

Useful tips:
• For more accurate measurements, keep your hands warm, clean and dry.
• Avoid moving your finger, talking, or exercising during the measurement.
• Take measurements while stationary and repeat them if necessary to compare results.
• Nail polish, artificial nails or strong pigmentation may affect the accuracy of the measurement.
• Replace the batteries when the low battery warning appears on the display.
• Store the device in a dry place, protected from shocks and extreme temperatures.

Warnings:
• The device is intended for monitoring measurements and is not a substitute for a medical diagnosis or professional medical examination.
• Do not use a damaged device or a device with a defective sensor.
• Do not immerse the product in water or expose it to excessive moisture.
• Do not use the device near strong electromagnetic sources that may affect operation.
• If you feel unwell or have unusual results, consult a healthcare professional.
• Keep batteries out of the reach of children and dispose of them according to regulations for waste batteries.
• The product is not a toy and is not intended for children without adult supervision.

It is important to know

The finger pulse oximeter and heart rate monitor is very easy to use and is mainly suitable for quick monitoring of oxygen and pulse at home or on the go. The key practical aspect here is mainly ease of use, with less emphasis on long-term storage of measurements or advanced features for monitoring trends. It is important to consider the method of use and any restrictions on recording or sharing results before purchasing.

• Because it does not allow for storing measurements for multiple users, it is not ideal for long-term monitoring or alternating use in a larger family.
• Using a fingertip design allows for discreet and quick measurement anywhere, but it is not the best choice if you need reliable tracking over longer periods of time.
• The OLED display with numeric displays makes it easy to read quickly, but to compare results over time, you will need to record values manually.
• The Pi indicator and automatic shut-off are primarily practical functions for basic everyday use without additional settings or apps.

Source of editorial recommendations: ENAA guides and team experience.

In practice

🟢 Quick occasional measurement at home

The device is very convenient for quickly checking oxygen levels and pulse without any complicated preparation, as it is used on the finger and does not have complicated menus.

🟡 Monitoring measurements for the doctor

Suitable with limitations – it is possible to monitor measurements, but the data cannot be stored directly on the device, so for long-term monitoring you will have to record the data manually.

🟢 Travel or field use

The compact size and fingertip measurement method make it a suitable companion for travel where there is no space for larger devices.

🔴 Family use with multiple users

Less convenient, as there are no separate profiles or memory to store multiple measurements from different people.

Answers to frequently asked questions

Can the meter itself record results for multiple people?

No, the device does not allow you to save measurements for multiple users, so the results must be recorded manually.

What does the PI display mean?

PI (Perfusion Index) shows the quality of blood flow in the finger, which can help assess the reliability of the measurement.

How quickly is the result displayed?

The result is visible on the OLED screen within seconds of placing the oximeter on the finger, allowing for quick use.

Is the oximeter suitable for monitoring measurements over a long period of time?

Manual recording is required for long-term trend monitoring or data availability for the physician, as storage on the device is not possible.

Description updated: October 2026

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