Metabolic breath analysis

SBN41 for respiratory gas exchange monitoring (O₂ & CO₂) for every breath

Metabolic health drives fitness, personalized nutrition, and longevity. Measuring oxygen uptake (VO₂), carbon dioxide production (VCO₂), and ventilation (VE) reveals energy metabolism, fuel utilization (RER/RQ), and VO₂ max. These metrics were once limited to labs and elite athletes by using Cardiopulmonary Exercise Testing (CPET), Indirect Calorimetry (IC), and ergo spirometry.

 

But human breath is complex. Rapid shifts in temperature, humidity, and gas composition, combined with exposure to ambient conditions, make accurate measurement extremely challenging. Until now, no scalable technology has delivered lab-grade precision, fast response, and robustness for consumer devices.

Why choose Sensirion for medical-grade metabolic monitoring?

We eliminate barriers to medical-grade accuracy with a solution that solves the complex challenges of dynamic breath measurement.

True respiratory gas exchange sensing

Capture O₂ and CO₂ waveforms you can trust for every breath. Unlike single-parameter sensors, our solution delivers full respiratory gas exchange data required for accurate VO₂ , VCO₂ and RER calculation.

Accurate performance at rest and during exercise

Our solution maintains precise O₂ and CO₂ measurements even under rapid changes in temperature, humidity, and gas composition at high breathing rates.

Scalable solution for consumer devices

Bring medical-grade metabolic monitoring to consumer devices at a cost that enables mass adoption. Our compact design and flexible interfaces make integration straightforward.

Our breakthrough: SBN41 gas exchange sensor for wearables and smart devices

 

We bridge the gap between lab-grade precision and consumer-ready design. The SBN41 is a miniaturized respiratory gas exchange sensor that delivers real-time, breath-by-breath analysis of O₂ and CO₂ with medical-grade accuracy in a compact form factor. Built to handle the dynamic conditions of human breath, it enables portable indirect calorimetry and advanced metabolic monitoring, bringing lab-quality insights to wearables and smart devices for everyone.

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Interested in pre-market release samples?

Pre-market release samples give you the chance to test sensor behavior in real-world conditions, access detailed technical documentation, and provide input before final release.

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Key features for accurate breath analysis in real-world conditions

Unlike existing solutions, the SBN41 combines unique features with design simplicity:

 

  • Compact form factor
    Integrates seamlessly into wearables and portable devices
  • Multi-parameter sensing
    Measures CO₂, O₂, pressure, temperature, and humidity in one module
  • Real-time breath profile
    Resolves complete breath profiles for every breath
  • Humidity compensation
    Ensures robust and reliable signal quality even under rapidly changing conditions
  • Flexible design 
    Choose from two interface options for easy system design

Target applications for metabolic breath monitoring

  • Fitness & Performance
    VO₂ max, training zones, recovery monitoring
  • Nutrition & Metabolism
    Fuel utilization (fat vs. carbs), personalized diet insights, Resting Metabolic Rate (RMR)
  • Longevity & Health
    Metabolic flexibility, early risk detection
  • Beyond Wearables
    Stress monitoring, respiratory health insights

Further applications

Medical

Precise, safe ventilation of patients

Medical

Reliable drug delivery during infusion

Medical

Supporting asthma and COPD patients during inhalation