Fingertip Pulse Oximeter

Better Data = Better HealthTM
Better Data = Better PerformanceTM

What Better Data Means to You

MightySat is ideal for people who know they want a fingertip pulse oximeter and want the best available technology. MightySat is also for people who want to improve their health, wellness, or fitness by providing key measurements that are more accurate and not available on other health and wellness devices.

Masimo Personal Health - Morning Monitoring with MightySat
Masimo Personal Health - Workout Monitoring with MightySat

Accurate When You Need it Most

The Leading Hospital-Grade Technology

Masimo pulse oximeters are the leading brand in hospitals because of Signal Extraction Technology (SET®), which provides accurate measurements when other hospital-grade pulse oximeters fail—during movement and low blood flow.

Oxygen Saturation (SpO2)

Oxygen level in the blood to indicate changes due to heart or lung function, oxygen use by your body, or altitude.


Pulse Rate (PR)
Number of heart pulses per minute to indicate overall
fitness or exertion levels at any time.

Perfusion Index (Pi)

Strength of blood flow to the finger to indicate changes
in blood circulation.

The Masimo Accuracy Advantage

Performance Index of Oxygen Saturation During Movement and Low Blood Flow*¹

Performance Index of Pulse Rate During Movement and Low Blood Flow*¹

Breakthrough Measurements on MightySat

MightySat gives you a more complete picture than the limited data available from other health and wellness devices.

Respiration Rate (RRp)
Number of breaths per minute to indicate how well your heart and lungs are functioning or how quickly you recover after exercise.

Pleth Variability Index (PVi)
Variation in perfusion index over your breathing cycle, which may indicate changes in hydration, breathing effort, perfusion, or other factors.* 2-4

Masimo Personal health - MightySat iPhone Solo UI Animation

Do More with Your Data

Download the Free App***
  • Display, track, and trend data on compatible devices through the Masimo Personal Health App
  • Alert you when data is out of target range
  • Share data through email and social media
  • Automatically store data in Apple Health or TrainingPeaks

Compatible with select iOS and Android devices.
iPhone not included

Hospital-grade Technology For You

From the Leader in Hospital Pulse Oximetry

Masimo is the leading brand of hospital pulse oximeters⁵ because they provide accurate measurements when other pulse oximeters fail by using revolutionary, Signal Extraction Technology® (SET®). Masimo SET® uses five parallel signal processing engines that measure through challenging conditions, including movement and low blood flow. With MightySat, the same high-performing Masimo SET® technology is now available for general wellness and health applications.


1 Shah N et al. J Clin Anesth. 2012;24(50):385-91.
2 Schooljans A et al. Acta Anaesth Belg. 2010 (61), 147-150.
3 Mathews D et al. ASA 2014. A1124.
4 Perel A. Anesth Analg. 2014 Dec;119(6):1288-92.
5 iData Research U.S. Market for Patient Monitoring Equipment 2014.

* 10 volunteers with adhesive finger sensors from Masimo and the #2 hospital-grade brand were tested during movement and low blood flow with machine- and volunteer-generated hand motions to calculate accuracy, which was defined as oxygen saturation within 7% and pulse rate within 10% of reference.
** It is suggested to measure PVi in the same body position, remaining still and without talking, at the same breathing rate and depth of breathing, until you see a high confidence PVi value (displayed value is bright, not dim). An increase in PVi may indicate a decreased level of hydration, increased breathing effort, or other factors. A decrease in PVi may indicate an increased level of hydration, decreased breathing effort, or other factors. Multiple factors other than hydration and breathing effort can affect PVi, including breathing rate, depth of breathing, body position, body movement, vascular tone, blood flow to the finger (perfusion index), normal variation within a short-term monitoring session, waveform shape changes, and/or cardiovascular abnormalities.
*** The app is downloadable from the App Store™ for iOS devices or Google Play™ store for select Android devices. For an up-to-date list of compatible smart devices, see