Product
An analyzer that rides on your breath.
A compact gas and flow analyzer on a breath-through tube, held to a silicone mask by a five-point harness. No hoses, no backpack, no cart.
The design
Breath goes straight through.
A compact analyzer rides on a low-resistance flow tube in front of your mouth. Nothing hangs off your back, and nothing tethers you to a cart.
- AOpen flow tube
Every inhale and exhale passes through it, so every breath is counted.
- BOn-mask analyzer
Gas, flow and computing live in one sealed body above the tube.
- CFive-point harness
Designed to hold a gas-tight seal from a warm-up jog to a maximal sprint.
Inside the analyzer
Six parts, one sealed system.
Scroll to take VenTracer apart, from the mask port outward.
- 01AirSeal port lock
Locks the analyzer to the mask and keeps the joint gas-tight.
- 02Breath flow sensor
A low-resistance tube that measures every inhale and exhale.
- 03Dual-gas breath core
Reads oxygen and carbon dioxide on every breath.
- 04On-mask compute and wireless
Turns gas and flow into VO2 and streams it live.
- 05Rechargeable power cell
Supervised power with a fast cut-off if anything runs out of spec.
- 06Front housing
Protects the stack and carries the breathing port and mark.
Design concept. Parts and layout may change before production.1
Explainer · 90 s · sound on
How VenTracer works, in 90 seconds.
From the number on your watch to measured gas exchange, what's inside the analyzer, and how thresholds become training zones.
Narrated, with English captions. Renders of a design concept; on-screen values are simulated.2
TranscriptRead the narration
Your watch shows you a VO₂max number. But it's an estimate, worked out from your heart rate and pace. In a lab, VO₂max is measured, from the oxygen you breathe in and the carbon dioxide you breathe out. That means a cart, a hose, and a treadmill you can't leave. VenTracer puts that measurement on your face. A compact analyzer rides on an open flow tube, right in front of your mouth. Every breath passes straight through it. No hoses. No backpack. Inside, a flow sensor measures the volume of every breath. A dual-gas core reads oxygen and carbon dioxide. And an on-mask processor combines them, breath by breath. Air goes in at about 21% oxygen, and comes back out with less. That difference, multiplied by how much air you move, is your oxygen uptake. On a ramp test, oxygen uptake climbs steadily. Carbon dioxide doesn't. It breaks upward at two points: your ventilatory thresholds. They set your training zones. Results stream to the app while you test. When you stop, you get your VO₂max, both thresholds, and zones you can train by the same day. VenTracer is still in development. We'll test it side by side with a lab cart, and publish the results before we claim any accuracy. VenTracer. Trace every breath.
Outputs and specifications
Six outputs, all from measured gas exchange.
VO2max
Your aerobic ceiling: the most oxygen your body can take in and use.
VT1 and VT2
Training zones anchored to your own physiology, not a formula. How thresholds are found.
RER and fuel mix
Estimated fat and carbohydrate use at steady-state intensities below VT2.
Ventilation
How much air you move, with breathing rate and tidal volume.
Energy expenditure
Calories burned, calculated from VO2 and VCO2.
Full record
Every breath stored for your coach or lab to review.
Measurement
- Gases
- Oxygen and carbon dioxide
- Sampling
- Breath by breath
- Flow
- Bidirectional flow tube, every inhale and exhale
- Compensation
- Pressure, temperature and humidity
Fit
- Mask
- Soft silicone oronasal maskPRELIM
- Sizes
- Multiple mask sizesPRELIM
- Harness
- Five-point head harness
- Flow tubes
- Sizes for rest and maximal effortPRELIM
Electronics
- Processing
- On the device, breath by breath
- Wireless
- Bluetooth LEPRELIM
- Power
- Rechargeable; runtime to be confirmedPRELIM
- Reference
- Room-air reference before each testPRELIM
Data and status
- App
- VenTracer app for phone and tabletPRELIM
- Export
- Raw breath-by-breath dataPRELIM
- Stage
- Design concept; prototypes 2027
- Use
- Fitness and performance; not a medical device4
The app
From first breath to training zones.
VenTracer streams every breath to your phone. You watch the test live, get the report as soon as you stop, and leave with zones you can train by the same day.
Ramp test
Minute 9 · 265 W
Ramp test report
15 Oct · 14 min 06 s
Your zones
From 15 Oct ramp test
Concept app screens with simulated data.2
- Fit and seal checkabout 1 min
The app checks the mask seal and the room-air reference before you start.
- Warm up5–10 min
Easy effort while breathing settles and the analyzer stabilises.
- Ramp8–12 min
Power or pace rises in steps until you can't hold it. Every breath is recorded.
- Reportwhen you stop
VO₂max, VT1, VT2, intensity zones and an estimated fuel mix, ready to share with your coach.
Fit and care
Made to be worn hard and cleaned often.
A breath analyzer is only as good as its seal. The mask, harness and flow tubes are designed to stay gas-tight at maximal effort and to come apart for cleaning between athletes.
Soft silicone, several sizes.
An oronasal mask with a flexible lip that seals on the face, not the nose bridge alone. Sizes to be confirmed in fit testing.PRELIM
Five points of contact.
Crown, temple and neck straps spread the load, designed so the seal holds above 100 litres a minute.
Sized for the effort.
Interchangeable tubes for rest and for maximal efforts, so resistance stays low and readings stay in range.PRELIM
Twist on, twist off.
The analyzer locks to the mask port with a quarter turn. No tools, and no loose hose joints to leak.
Wipe the analyzer, wash the mask.
Parts that touch breath are designed to be removed and disinfected between users. Cleaning instructions will ship with pilot units.PRELIM
One light, one button.
A single status light shows power, link and warm-up. Everything else lives in the app.
Want an early unit on your bench?
Pilot partners get engineering units before anyone else, in exchange for side-by-side testing.