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Oximeter: Unresponsive Device

If you have an oximeter (Nonin 3150) that does not turn on, even if you have inserted new or fully charged batteries. These steps may help you. 

  • Remove the batteries
  • Disconnect the probe from the oximeter
  • Wait for approximately 30 seconds
  • Insert the batteries again
  • Press and hold down the grey activation button (approximately 3 seconds)

  • Connect the probe again

  • The oximeter should now have turned on 


If this issue happens repeatedly please contact for investigation of a potential device failure.


*Please note that not all features or all products are available in all markets. Our products are medical devices and subject to registration/approval in each market area. For more information on product availability please contact

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