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Sleep Monitor CMS50EW-SLN by Contec

Ideal for spot checks and overnight monitoring

Sleep Monitor CMS50EW-SLN by Contec

Pricing Information

Retail Price: $299.99

AmperorDirect Price: $166.88 (44% savings!)

Shipping Included for USA customers (We ship internationally daily)

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Shipping Information

Shipping Weight: 1.50 pounds

Shipping Cost: US Shipping included! Int'l Shipping calculated at checkout

In-stock items are normally shipped within 24-48 hours on business days. For special handling or overnight shipping, please call us at 281-664-1209.

Manufacturer Information

Manufacturer: Contec Medical Systems

Item Code: CMS50EW-SLN

Product belongs to these categories...

Ambulatory Monitors 

Sleep Monitors 

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Sleep Monitor CMS50EW-SLN is a small pulse oximeter with a silicone probe. The sleep monitor can be used during sleep to record blood oxygen saturation level (SpO2) and pulse rate in real time at home. The stored data can be saved to a computer for further analysis and archive. The sleep monitor is commonly used at sleep laboratories or home for diagnosing or monitoring sleep apnea. In addition, the oximeter can be used during exercise to monitor one's blood oxygen level and heart rate, which is essential for patients with heart or breathing problems.

Sleep apnea is a common chronic disorder that is very common for older people. Sleep apnea affects over 50% of people older than 60. Both sleep apnea and hypopnea can cause the patient to feel increased and continuous fatigue, lethargy, decreased ability to concentrate, increased irritability, and morning headaches.

Sleep monitor CMS50EW-SLN has an integrated sensor and a silicone probe. The integrated sensor is for spot checking and the silicone probe is for continuous or overnight monitoring. CMS50EW-SLN is a premium pulse oximeter loaded with features and is highly reliable and accurate.

Sleep monitor CMS50EW-SLN has an alarm feature with an on/off switch. Whenever the SpO2 or pulse rate falls outside a range, the alarm will go off. The range can be configured in the system settings.

There are two ways to connect the sleep monitor to a computer using a USB cable or the integrated Bluetooth. For Bluetooth connectivity, turn on Bluetooth on your computer and CMS50EW-SLN, start the CMS50EW-SLN software (SpO2 Assistant), and you will see your pulse and blood oxygen saturation level display on your computer monitor. If your computer does not have built-in Bluetooth capability, you would need to get a Bluetooth dongle for your computer. This is an ideal way of capturing data for detection of hypoxic episodes and irregular heart rate.

When using a probe, the data will be stored inside CMS50EW-SLN and can be uploaded later. When using the integrated sensor, the data can be transmitted to the computer at real time.

Your Windows computer can retrieve and save data from CMS50EW-SLN for further analysis. Data can be transferred to the computer in real-time mode or saved in the sleep monitor for later archive.

The multicolor display of CMS50EW is clear and attractive and is one of the best on the market. CMS50EW has 4 display modes so the readings can be viewed from all directions. This makes it easy to read for the caretaker or the patient. The audible alarm can be configured and switched on/off as desired depending on the environment. CMS50EW has an internal memory capable of storing 24-hour worth of data, which can be saved to a PC via a USB cable or Bluetooth adapter. Software is also included for reporting, data analysis and archive.

The pulse oximeter CMS50EW-SLN comes with a rechargeable lithium ion battery that will last for up to 24 hours. The battery can be recharged via the USB port or with the included AC adapter.

The alarm is surprisingly loud for such a small device and can wake someone up unless you are a heavy sleeper. You can use this as a warning if the oxygen saturation level falls below a preset number or the pulse rate falls outside a given range.

A patient can record the data, print reports and show them to his doctor. This will further assist the doctor in evaluating the patient's condition. No more expensive equipment is required.

For more information on CMS50EW-SLN , see our CMS50EW-SLN Reference page.

Sample computer screens

CMS50EW sample report 1
CMS50EW sample report 2


  • Display SpO2 waveform (plethysmorgram), pulse rate, SPO2, pulse bar
  • Adjustable alarm thresholds
  • LCD display with four display modes
  • Bluetooth connection to PC
  • Reliable accuracy and durability
  • Automatic power-off design
  • Low power indicator
  • Pulse rate audio recognition function
  • Adjustable screen brightness
  • Real-time data transmission to computer
  • Software for data analysis and management
  • Storage for 24-hour data
  • USB cable and AC charger included
  • FDA 510(k)# K090671


  • Display: 1.3" 65K Color OLED display
  • Screen Resolution: 128*96
  • 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: 20 hours
  • Battery working life: Charge and discharge no less than 500 times
  • Dimensions: 57x32x30 mm
  • Weight: 50g including batteries
  • Automatic power-off after 5 seconds
  • 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%.
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