CMS-50E Fingertip Pulse Oximeter with Alarm

$79.00 79.00

Available Options

The CMS50E Fingertip Pulse Oximeter is an FDA-approved device for spot-checking blood oxygen saturation levels and pulse rate. The CMS50E’s padded finger chamber comfortably fits any finger size and delivers a swift reading. The device is battery-powered for portable and handheld use. All of the device’s operations are controlled with a single button located on the front of the device. This pulse oximeter was made for ease of use by physicians, nurses, patients, athletes, and pilots.

This pulse oximeter uses a small but powerful measurement system. The device accurately measures oxygen saturation (Sp02) and pulse rate directly from the user’s finger. This blood oxygen sensor detects low oxygen levels in the blood, even when the wearer is not actively interacting with the device.

The CMS50E comfortably fits on any finger when in use. The oximeter is compact and lightweight, making it ideal for on-the-go use or storage in a small space. The CMS50E displays SpO2 and pulse rate measurement information using a sleek interface. The pulse oximeter does not require any external wires or probes when taking measurements.



Auditory and visual alarms in the device send alerts to the user when oxygen levels present in the blood go outside of the range set by the user. These alarms also alert to low voltage levels in the CMS50E, or if the device’s placement needs adjustment for a proper reading. A battery icon indicator provides a charge status level for the device’s rechargeable battery.

The CMS50E’s bright, multicolored screen displays detailed information with sharp text and images. The large screen can be easily read from many different viewing angles. Screen brightness is also adjustable to allow for use in a wide variety of lighting conditions.

SpO2 and pulse rate measurements are displayed on the device’s screen as a numeric value, bar graph, and animated waveform. These data visualizations present a clear image of the wearer’s blood oxygen levels and pulse rate to help the user understand the results. The animated images update in real-time during measurement.

Unlike most finger oxygen sensors, the CMS50E features a rechargeable lithium-ion battery. The built-in battery is rechargeable via USB or by plugging the device into the included power adapter. Battery life for the unit can last for up to 20 hours with standard usage.

The CMS50E can store up to 24 hours worth of information data history. This oxygen monitor integrates with the included software to transfer data to a computer. With this software, the user’s data can be exported to save or share with a medical professional or physician. A data transfer cable is included with the CMS50E for connecting the pulse oximeter to your computer.

This pulse oximeter is ideal for daily activity checks, COPD monitoring, sleep studies, home healthcare spot-checking, and medical professional practices. Many of the CMS50E’s advanced features are typically seen on more expensive pulse oximeters. All of the required accessories for use are included with this product. The CMS50E Fingertip Pulse Oximeter allows you to intelligently keep track of your body’s health and activity levels for everyday care at a cost-effective price.


Three Different Models

  1. - CMS50EW: With Bluetooth
  2. - CMS50E: With Wireless Transmitter & Receiver
  3. - CMS50E Basic: No Wireless Transmitter, Receiver or Bluetooth

Package Includes:

  1. CMS-50E Unit
  2. Neck/wrist Cord
  3. DC Power Adapter Plug
  4. USB Connector Cord
  5. 3.7V Rechargeable lithium battery (Long Battery Life)
  6. Instruction manual
  7. If ordered, the Wireless Transmitter/Receiver 

 Software Download (15.6 MB)


Features List

  • Integrated with SpO2 probe and processing display module
  • Compact and portable, allowing it to be taken with you throughout your day
  • Simple operation
  • Low power consumption
  • Operation menu for settings adjustment
  • SpO2 value display
  • Pulse rate value display
  • Bar graph display
  • Pulse waveform display
  • Display mode options
  • Adjustable screen brightness
  • Pulse rate sound indication
  • Upper/lower alarm range threshold settings
  • Battery capacity indication
  • Low-voltage indication
  • Data transfer to PC
  • Real-time data display on PC
  • Auto-shutdown function automatically powers off the device within
    5 seconds of finger removal
  • RF Wireless communication function (option)
    (only applied for Ver6.6R or above)
  • Connected with an external oximeter probe (option)
    (only applied for Ver6.6R or above)


CMS-50E Product Videos



Extended Specifications

Warranty: 1 Year
SpO2 Range: 0% - 99%
SpO2 Accuracy: 70% - 99%, ±2%, 0 - 69%, unspecified
SpO2 Resolution: 1%
SpO2 Measurement Range: 0% - 100%
Pulse Rate Accuracy: ±2bpm or ±2%
Pulse Rate Resolution: 1bpm
Pulse Rate Measuring Range: 30bpm - 250bpm
Power Supply Requirement: 3.6V DC - 4.2V DC
Battery Type: Interior lithium battery, B F
20 hour working life expected per charge
Charge and discharge no less than 500 times
Operating Temperature: 0°C - 50°C
Storage Temperature: -40°C - 60°C
Operating Humidity: 15% - 95%
Storage Humidity: 5% - 95%
Operating Pressure: 700hPa - 1060hPa
Storage Pressure: 500hPa - 1060hPa
Dimensions: 57 x 32 x 30 mm
Weight: 1.8oz (50g with lithium battery)
Display Type: 1.36" 65k color OLED display
Display Resolution: 128x96
Parameter: SpO2 (2-digit), PR (3-digit)
Bar Graph (6-segment), pleth waveform
Alarm Types: Measurement out of set limits, Low voltage, Finger out of position

Customer Reviews

Based on 12 reviews
Henning Leidecker

It works as advertised.

david burns

It would not connect to usb

Ayyadevera Rao
Stopped working

My oximeter stopped working two weeks after purchase. It doesn’t turn on and not charging

BRUCE Manildi
A bit erratic in it's response

You must position your finger very accurately to get a response. If you are a bit off, it can't read your pulse. You kind of have to play around with the position of your finger

Gerald Robinson
Need to check oxygen levels when traveling.

This is 2nd Pulse Oximeter that I have own and both were from Facelake. The other unit a version 6.6 needs repairs, but I was concerned that the cost of repair would be greater than the replacement cost.
When I was in the army, I was a Mountain Climber instructor for Rangers and Special Forces in Colorado and South America. I spent so much time at high altitudes that I developed a condition that resulted in a high hemogolbin count, and strange as it seems, for several years I could bereath easier at 18000 feet than I could at sea leave. I have had three pulmonary embolism and have been on blood thinners since 1971, with blood test that range from weekly to monthly. I like to travel, and my doctors feel that I need to check my blood oxygen level if I go above 5000 feet. I am planning another trip to Colorado, but have no idea when I will be traveling The Covid-19 virus makes going or staying a problem.