Masimo W1™ Limited Market Release

Masimo W1™ Limited Market Release


Be among the first to participate.

On May 2, 1989 a garage startup solved the “unsolvable” problem of inaccurate and unreliable pulse oximetry measurements during real-life conditions such as movement. That startup was Masimo, the inventor of Measure-through Motion and Low Perfusion™ SET® pulse oximetry.

As the first of its kind, the W1 continues Masimo’s legacy of innovation with accurate, continuous monitoring of multiple health parameters – including oxygen saturation (SpO2), pulse rate, perfusion index, PVi®, and respiration rate, alongside step count and fall detection. This personal, discreet, and lifestyle-friendly wearable is designed to offer actionable insight into your health.

Additional measurements, features, and insights will be activated throughout the program.

Masimo will provide a limited number of W1s on a first-come, first-served basis, at a 50% discount, to users who agree to the program details and to provide feedback and data to Masimo.

Program Details:

  • To apply, you must be over 18 years of age and a resident of the U.S.
  • You will need to provide weekly feedback on your experience with the watch, in the form of questionnaire answers and feedback sessions, and to submit the personal health data collected by the W1 for our engineering team to analyze.
  • You will be asked to sign a Non-Disclosure Agreement (NDA).
  • To operate, the W1 will need to be paired with a smartphone running Android or iOS, onto which you will need to download the Masimo Personal Health app.
  • As firmware, software, security, and other technical updates are released, you will be expected to download and install them as soon as possible in order to ensure your W1 is kept up to date.
  • At Masimo's discretion, you agree to return W1 to Masimo for a full refund or an exchange for a new W1.
  • Not all requests to join will be able to be honored.

Apply to Participate

Apply to Participate


Masimo will contact you at the email address you submit above. We will let you know whether you have been chosen to participate in the W1 Limited Market Release and details about your participation.

For more information about your privacy rights, please see Masimo’s General Privacy Notice. For California residents, please see our CA Privacy Notice.

Masimo W1 is not FDA cleared.