Limited Warranty and Returns Policy

Revised: March 2023

This Limited Warranty and Returns Policy applies to the Masimo products (each, a “Product”) listed below and is given by Masimo Americas, Inc. (“Masimo”) only to the original purchaser of the Product from Masimo or any Masimo authorized reseller. Except where prohibited by law, this Limited Warranty does not extend to any subsequent Product owner or other person to who the Product is transferred.


Returns Policy

You can return a new unopened Product purchased directly from Masimo for a refund within 30 days of the original purchase date.

To obtain a refund under this Return Policy, please follow the steps under “How to Return a Product or Obtain Warranty Service” below.

If the Product is returned to Masimo in accordance with this Return Policy, Masimo will credit the account you used to make the original purchase with the full purchase price you paid for the Product and any applicable taxes minus shipping charges you paid, if any, when you purchased the Product. Shipping charges are nonrefundable.

Once received by Masimo, returns are usually processed within 10-15 business days. The time required to credit the account used to make the original purchase can vary and is determined by your bank. Please contact your bank for details.

Masimo can only accept returns for Products purchased directly from Masimo. Products purchased from a Masimo authorized reseller should be returned to that reseller.


Limited Warranty

Subject to the limitations below and as long as used in accordance with the directions for use, Masimo warrants to the original purchaser of a Product for the time period below (“Warranty Period”) that any new component included with a Product will be free from defects in materials and workmanship (the “Limited Warranty”).

The Limited Warranty gives you specific legal rights and you may have other rights that vary from state to state.

Masimo limits the duration and remedies of all implied warranties, including without limitation, the warranties of merchantability and fitness for a particular purpose to the duration of the Warranty Period. Some states do not allow limitations on how long an implied warranty lasts, so this limitation may not apply to you.

Product Warranty Period of Product or Component

Opioid Halo™

  • Chip: 1 year from date of purchase
  • Sensor: End of the specified battery life or the expiration date, both as listed on the packaging, whichever occurs first
  • Home Medical Hub: 1 year from date of purchase

Masimo W1™

  • Masimo W1: 3 years from date of purchase

Masimo Sleep™

  • Chip: 1 year from date of purchase
  • Sensor: End of the specified battery life or the expiration date, both as listed on the packaging, whichever occurs first

Radius T°™ Continuous Thermometer

  • Sensor: End of the specified battery life or the expiration date, both as listed on the packaging, whichever occurs first


  • MightySat: 2 years from date of purchase


  • iSpO2: 1 year from date of purchase

Masimo may change the availability of the Limited Warranty at its discretion, but any changes will not be retroactive.

This Limited Warranty does not apply to (a) any non-Masimo product, even if included or sold with a Product; (b) any software or application used with the Product, even if packaged or sold with the Product or embedded in the Product or (c) any non-Masimo network or system on which the Product operates. You should refer to the Terms of Use for the specific Product for additional details.

If a component of a Product becomes defective during the Warranty Period, Masimo will, at its sole option, either repair or replace the defective component or Product, free of charge to you. Masimo will also pay for shipping and handling fees to return the repaired or replacement Product to you. The Warranty Period is not extended if Masimo repairs or replaces the Product. The Limited Warranty will apply to the repaired or replaced component for the remainder of the original Warranty Period, or 30 days from the date of replacement, whichever is longer, or for any additional period of time that may be required by applicable law.

To request Product repair or replacement under the Limited Warranty, please follow the steps under “How to Return a Product or Obtain Warranty Service” below.

What is Not Covered?

The Limited Warranty above does not apply to: (a) any component of the Product that is: (i) not new or in its original packaging when supplied to you; (ii) modified; (iii) used with non-Masimo supplied or approved devices (including unsupported mobile devices), components, accessories, or software; (iv) disassembled or repaired by anyone other than a person authorized by Masimo; (b) normal wear and tear; (c) damage resulting from accident, misuse, abuse, negligence; or (d) failure to use the Product in accordance with the instructions and warnings provided with the Product or any published documentation.

Limitation of Remedies & Liability

The remedies in the Limited Warranty are your only remedies and Masimo’s entire liability for any breach of the Limited Warranty. Masimo’s liability under any circumstances will not exceed the actual amount paid by you for the defective Product, and under no circumstances will Masimo be liable for any consequential, incidental, special, or punitive damages or losses, whether direct or indirect.

Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. In these states, the liability of Masimo, its licensors, and affiliates will be limited to the greatest extent permitted by law.

How to Return a Product or Obtain Warranty Service

If you need to return a Product or obtain warranty service, please contact Masimo Customer Support by:

Calling Us:

Masimo W1, Opioid Halo, Masimo Sleep, Radius T, MightySat, iSpO2 and all other consumer products – (800) 916-1270, 24 hours a day / 7 days a week


Emailing Us:


Submitting your Request through our Web Pages

MightySat & iSpO2

Masimo W1 –

Opioid Halo –

Masimo Sleep –

Radius T –

A Masimo customer service representative will give you instructions on how to return your Product or receive warranty service. If Masimo authorizes the Product return or warranty service, Masimo will provide you a return merchandise authorization (“RMA”) number. After you receive an RMA number, you must:

  • Include your RMA number and proof of purchase with your Product (if requested);

  • Safely and securely package the Product, preferably in the original packaging;

  • Return the Product or Product component to an address specified by Masimo; and

  • Follow any other instructions or steps given to you by the Masimo Customer Service representative.

You are responsible for return shipping charges and any risk of damage or loss while in transit to Masimo. Masimo recommends a traceable shipping method.

For Products returned under the Returns Policy, you must request an RMA number from Masimo during the 30-day period following the original purchase date. The returned Product must be received by Masimo within 30 days from the date on which the RMA was issued in order to receive a refund. Masimo cannot accept returns without prior authorization.

Under the Limited Warranty service, Masimo will ship a repaired or replaced Product to you free of charge. You are responsible for all other shipping costs unless prohibited by law.


Other Important Notices

The rights provided to you under the Limited Warranty are provided in addition to your rights and remedies under consumer protection laws and do not affect your legal (statutory) rights under applicable law.

The Limited Warranty is offered subject to Masimo’s Terms of Service for the applicable Product, which may change from time to time. You can find the latest version of the Terms of Service for each Product in the Product App, in the Product manual or packaging, or by calling Masimo Customer Support at (800) 916-1270. If there is a conflict between the Terms of Service for a Product and the Limited Warranty, the Limited Warranty will prevail. No Masimo reseller, distributor, agent or employee is authorized to make any modification, extension, or addition to the Limited Warranty.

Any product returned to Masimo without a valid warranty claim or without an RMA number may be rejected, returned at sender’s cost (subject to prepayment), or kept for 30 days and then disposed of at Masimo’s option.


Close (esc)


Use this popup to embed a mailing list sign up form. Alternatively use it as a simple call to action with a link to a product or a page.

Sign up for our newsletter

Age verification

By clicking enter you are verifying that you are old enough to consume alcohol.

Shopping Cart

Your cart is currently empty.
Shop now