Spaceflight-inspired pocket optical breath analyzer – 10Hz CO2/O2
We built a pocket-sized optical breath analyzer based on an optical sensor for measuring CO2 and O2. It streams CPET metrics in real time (VO2, VCO2, VE, RER, Tv etc) for breath-by-breath analysis. Functional prototype based custom PCB, mobile app, and web platform are working. Demo videos: https://youtu.be/-DcvRPJJkj0 https://youtube.com/shorts/Ycy8wP4oW2o?si=W0n1Oyof7M37kdta What’s different Instead of electrochemical O₂ fuel cells and typical CO₂ NDIR modules (slower response, periodic replacement/calibration), we use non-consumable optical sensors…
Spaceflight-inspired pocket optical breath analyzer – 10Hz CO2/O2 launched on October 7, 2025 with 7 votes, #2,779 of 8,178 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.
What it does
Mera combines metabolic testing, health data and AI in one workspace for human performance labs, teams, coaches and athletes to understand performance over time.
Turn metabolic tests and physiological data into answers you can explore, compare and follow over time. Built for performance labs, sports scientists and coaches. One athlete profile for metabolic tests, physiological data and everything that changes between them. Turn your next metabolic or performance test into a profile you can understand and compare over time. Mera is developing optical sensing technology for metabolic testing, with faster response, no routine calibration and no annual sensorfrom mera.fit
In the maker’s words, at launch
We built a pocket-sized optical breath analyzer based on an optical sensor for measuring CO2 and O2. It streams CPET metrics in real time (VO2, VCO2, VE, RER, Tv etc) for breath-by-breath analysis. Functional prototype based custom PCB, mobile app, and web platform are working. Demo videos…
Does a similar job
all alternatives →- ALAir Lab – A portable and open air quality measuring device2025 · networkedartifacts.com · ▲497
Hi HN! I’ve been working on an air quality measuring device called Air Lab for the past three years. It measures CO2, temperature, relative humidity, air pollutants (VOC, NOx), and atmospheric pressure. You can log and analyze the data directly on the device — no smartphone or laptop needed. To better show what the device can do and how it feels like, I spent the past week developing a web-based simulator using Emscripten. It runs the stock firmware with most features available except for networking. Check it out and let me know what you think! The firmware will be open-source and available…
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My high school team’s space probe2025 · drive.google.com · ▲157Me and a few friends made this design document as part of our entry to the UK CanSat competition where a high school team is required to build a probe to be launched. The probe must serve some purpose, and ours was to map the temperature and pressure of the air at different altitudes. We had the opportunity to launch it a week ago and you can find the video of our launch here: https://drive.google.com/file/d/16bsLzxjP7OWRqVvCB62cLv7QYLR... During the launch we reached 400m above sea level, and the can pulled 70gs successfully. The parachute and can stayed intact.…
I wanted to measure CO2 in my office, so I build a C++ WebServer/App2019 · github.com · ▲146A simple webserver / CO2 Monitor. Contribute to Maddimax/MadCO2 development by creating an account on GitHub.
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Source: Show HN post ↗ · launch text quoted in part
Launched alongside, October 2025
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