Masimo SpO2 Sensor

  • Accurate measurement of arterial oxygen saturation.
  • Effective in screening out covid-19 cases.
  • Uses Signal Extraction Technology®
  • Available in adult, pediatric, infant, and neonatal sizes.
  • Easy to remove and reapply.
  • Suitable for patients with long fingernails or finger deformities.

What is the Masimo SpO2 sensor?

Masimo SpO2 sensor is an important tool to measure the SpO2 levels of the patient.  That are vital to the clinicians to manage cardiac medications and ventilation therapy.

What is SpO2?

SpO2 is the blood-oxygen saturation readings that indicate the extent of affinity of oxygen saturated hemoglobin molecules in the arterial blood. These readings are also obtained using pulse oximetry.

Diagnosis of Respiratory Ailments Using Masimo SpO2 Sensor

Accurate measurement of arterial oxygen saturation provides a chance to monitor and diagnose conditions such as acute lung injury, acute respiratory distress syndrome, or sleep-related breathing disorders.


Readings vary from 0-100% and in healthy adults can range from 94-100%. While numbers below this may indicate Hypoxia which is an absence of enough oxygen in the tissues to sustain bodily functions (arterial oxygen saturation value below 90% causes hypoxia).

Screening of Covid-19 Cases By SpO2 Readings

Alternatively, SpO2 readings are an effective tool in screening out covid-19 cases also. If the readings drop below the threshold of 90-92%, timely medical evaluation is warranted.

Signal Extraction Technology

Masimo SpO2 sensor uses Signal Extraction Technology®, or Masimo SET® assuming that both the arterial and venous blood can move and uses parallel signal processing engines like DST®, FST®, SST™, and MST™ to measure SpO2 in a non-invasive manner. 

The Working Principle Behind Masimo SpO2 Sensor

Within the Sp02 sensor, light-emitting diodes shine red and infrared light through the tissue. The sensor also measures the amount of red and infrared light received by the detector and calculates the amount of oxygen absorbed.

Absorption of Light By HbO2 and HB

Oxygenated hemoglobin (oxyhaemoglobin or HbO2) absorbs more infrared light than red light. Deoxygenated hemoglobin (Hb) absorbs more red light than infrared light. In comparison with the amounts of red and infrared light received, the pulse oximeter can also calculate the SpO2 readings. 

Availability in Different Sizes

The device is available in adult, paediatric, infant and also neonatal sizes. It is easy to remove and reapply. It is suitable for patients with long fingernails or finger deformities.


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