Biosense Ketone Breath Meter


Biosense® lets you measure your ketones without having to prick your fingers. Using only your breath, you can accurately track how your ketone levels shift without the pain, hassle, and expense of blood ketone tests.

Biosense® is a small, portable handheld device that can be used conveniently on your schedule. With a few simple breaths, you will discover the depth and duration of your fat burn.

User | Care Manual



Biosense® delivers accurate breath ketone data using a unique deep lung air sampling technique to measure across a broad range of ketone levels (ACEs). It is the only breath monitor with clinical data that shows a high correlation with blood ketones throughout a full day.


  • FDA class-1 medical device, backed by 2019 clinical trial
  • Unlimited measurements to validate fasting or carb-restrictive impact
  • In-app metabolic programs: Weight Loss, Anti-Inflammatory, Healthspan
  • Closes feedback loop for consumers, clinicians, and researchers
  • Bluetooth enabled device, micro USB charging cable included

Advanced Sensors

Patented Deep Lung Sampling technology measures breath acetone levels from only the latter part of the exhalation to gain the most accurate breath acetone detection.

Elegant Design

Its sleek design fits in the palm of your hand.

Battery Life

Battery life depends upon the preparation time, the number of measurements you make each day and the standby time (how long your device is asleep between each measurement.) From fully charged, and testing between 1-5 measurements each day, your battery should last 2-4 days between charges.Note that your Biosense device runs additional sensor diagnostics when asleep and plugged in to the charger. Plugging your device in each night, or every few nights, will therefore help reduce preparation time for measurements and maintain accuracy.


The Biosense® device uses patented Deep Lung Sampling technology to perform breath acetone measurements. The consistent sampling of only the latter part of the exhalation enables the most accurate level of breath acetone detection for nutritional ketosis monitoring. Deep lung sampling provides accurate and reproducible measurements by correcting for natural variations in exhalation time and lung capacity across individuals. Biosense® is the only breath monitor to provide this patented technology.

As Easy As A-C-E’s

If you have tried or researched the Biosense device, you may have noticed that breath ketone test results are reported in units called ACEs. But what exactly are ACEs? ACEs are a unit that translates parts per million (ppm) of breath acetone into a blood ketone equivalent.

The ACEs unit is approximately equal to 10x the blood ketone equivalent. It is important to remember that the 10x correspondence may not be observed for all measurements. The precise blood/breath correspondence depends upon the individual and upon several other factors. For example, blood and breath ketones do not change at the same rate, and this can lead to deviations from the 10x correspondence when comparing blood and breath directly. If you keep these factors in mind, 10x is a good rule of thumb.

  • 0-4 ACEs
  • 5-14 ACEs
  • 15-30 ACEs
  • 31-39 ACEs
  • 40+ ACEs

An ACE score of 0-4 indicates No or Low Ketones

At 5 ACEs, research shows you are primarily using fat for fuel!

An ACE level of 5-14 indicates a level of Moderate Ketosis

An ACE score of 15-30 indicates a level of Advanced Ketosis.

An ACE score of 31-39 indicates a level of Deep Ketosis.

Congrats, a score of 40+ ACEs indicates that you are in a High State of Ketosis.

Additional information

Weight2 kg

There are no reviews yet.

Be the first to review “Biosense Ketone Breath Meter”

Your email address will not be published. Required fields are marked *