Bluetooth Pulse Oximeter Contec CMS50EW with Alarm

Bluetooth Pulse Oximeter Contec CMS50EW

Model: CMS50EW by Contec Medical Systems

Shipping Weight: 1.00 lb

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Price: $99.88 Standard US shipping included.

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Bluetooth pulse oximeter CMS50EW is a deluxe model with many outstanding and useful features and suitable for many applications. Furthermore, the oximeter is reliable and accurate. CMS50EW is for both personal and medical facilities, such as hospitals, medical laboratories, and doctor's offices.

A pulse oximeter is inexpensive and versatile. It should be included in all household's medicine cabinet. There are many useful applications, from general health, sleep apnea to heart attack.

CMS50EW comes with software for managing your data. The data can be transferred to your computer using either an USB cable or Bluetooth connection. Transfer is simple. Connected the CMS50EW to your computer, only a few clicks are needed to see the report on your computer screen. Data can also be captured real-time1. Use the Bluetooth wireless connection if you do not want to have a wire connected to the computer. This is probably true if you are using CMS50EW during exercise or in a sleep apnea study.

CMS50EW  with probe

CMS50EW has built-in Bluetooth capability. To use Bluetooth, your computer should have the capability to pair with a Bluetooth device, which is already embedded in many newer computers. If not, you would need to purchase a Bluetooth USB dongle, which is available for around $12.

You can also attach different probes to a CMS50EW. Depending on your application, you may need different types of probes. For example, in a sleep apnea study, a silicone pocket-style probe would work better to keep the sensor on the finger. Bluetooth is disabled when using an external probe.

Another key feature of CMS50EW is the built-in alarm for the pulse rate and SpO2. If any reading falls outside the defined range, the alarm would sound so one can take appropriate actions. The ranges are specified in the system configuration menu. One customer uses the CMS50EW to wake up his wife in case his SpO2 level falls below a certain level.

CMS50EW can store up to 24-hours of data, which can be transferred to a computer.

The pulse oximeter CMS50EW has a rechargeable lithium ion battery, which is good for up to 24-hours of continuous usage. The battery can be recharged via an USB port or an AC adapter.


  • Display SpO2 waveform (plethysmorgram), pulse rate, SPO2, pulse bar
  • Adjustable alarms for pulse rate and SpO2
  • OLED display with four display modes
  • Bluetooth connectivity
  • Reliable accuracy and durability
  • Automatic power-off
  • Low power indicator
  • Pulse rate audio recognition function
  • Adjustable screen brightness
  • Real-time data transmission to computer1
  • Data management software
  • Storage for 24-hour data
  • USB cable and AC charger included
  • FDA 510(k)# K090671

Sample software displays

CMS50EW sample report 1 CMS50EW sample report 2


  • Display: 1.3" 65K Color OLED display
  • Screen Resolution: 128*96 pixels
  • Operating System: Windows
  • SpO2:
    • Measurement range: 0-100%
    • Accuracy: 70-100% ±2%;
    • Resolution: 1%
  • Pulse rate:
    • Measurement range: 30-250 BPM
    • Accuracy: 30-100BPM ±2; 101-235BPM ±2%
    • Resolution: 1 BPM
  • Power Supply: 3.7v rechargeable lithium battery
  • Battery Working Hour: up to 20 hours
  • Battery working life: Charge and discharge no less than 500 times
  • AC adapter: 110-240v 50/60Hz
  • Dimension: 57x32x30 mm
  • Weight: 50g with batteries
  • 5 seconds automatic power-off
  • Low power indicator
  • Measurement Performance in Weak Filling Condition: SpO2 and pulse rate can be shown correctly when pulse-filling ratio is 0.4%. SpO2 error is ±4%, pulse rate error is ±2 bpm or ±2% (select larger).
  • Resistance to Surrounding Light: The deviation between the value measured in the condition of man-made light or indoor natural light and that of darkroom is less than ±1%.

1 Real-time data capture is disable when using a probe.