Σ Open infrastructure
Digital smell
for everyone.
Breweries, food plants, factories, research labs, developer desks — and the kitchen counter.
Hardware, data, and software for digital olfaction. Open-source, reproducible, built for research and industry.
Accuracy and benchmark measured on open data — see how we score it honestly in github.com/opensmell/interoperability.
Find your starting point
Whether you're buying, learning, building, coding, or researching — pick the path closest to you.
Monitor my process
Continuous chemical monitoring for businesses — a ready Smell Monitor array, not a DIY project.
See the Smell MonitorI want to learnUnderstand the science
The Academy walks you from sensor fundamentals to ML pipelines — no prior knowledge needed.
Start with the primerI want to buildBuild an e-nose
A $30 weekend build guide. ESP32, a few MOX modules, and a working classifier by Monday.
Open the build guideI want to codeTry Osmograph
Zero-code e-nose workflow — flash firmware, record traces, train detectors without typing a line.
Open OsmographI want to researchDive into the data
Open datasets, the framework paper, and explicit open questions the project wants answered.
Read the researchContinuous chemical anomaly monitoring.
Modular gas-sensor arrays with automatic drift correction. Detect chemical changes in fermentation, food storage, industrial processes, or any environment where air composition matters.
Drift correction lifts accuracy from 71.4% to 93.3% on the same benchmark. Different processes need different parameters — fermentation is slow-changing.
Applications
Every claim below is measured — experiments on real MOX sensor data.
Food Safety
838K samples, 59 food types, 10 MOX sensors — benchmarked on open data.
Industrial VOC
Continuous VOC monitoring with configurable sensitivity for your process.
Custom Detection
Train your own classifiers for your own smells — the SDK and protocol are open.
Gas excursions
Sudden excursions flagged against the baseline with adjustable sensitivity.
Cold Chain
Chemical changes in sealed storage appear before a temperature logger registers.
Breath Research
8 MOX sensors on exhaled-VOC data (Acevedo et al. 2021).
Multi-sensor profiles
Up to six hot-swappable MOX channels — one box, several chemistries.
Live data streaming
Continuous raw MOX readings over USB, Wi-Fi, or BLE — feed your own software.
Manage your fleet in one view.
Run one unit or several across a line, warehouse, or field site. Every device keeps its own baseline; Osmograph Desktop shows them all in one place.
Every number, sourced
Real data — 1M+ samples across 5 independent datasets, every number traceable to a source.
Food Freshness
SmellNet
Beef Spoilage
UCI Gas Drift
WineSmell
The open stack
Search, hardware, software, e-nose builder, appstore, academy.
Scent Search
Explore 4,800+ chemical-odour relationships. Search by smell or by molecule, then dive into PubChem data.
Start searchingSmell Monitor
Continuous chemical monitoring for industrial processes. Modular sensor arrays, Bluetooth, open-source firmware.
See the hardwareOsmograph
Zero-code e-nose workflow. Flash firmware, record live traces, train classifiers — no coding required.
Open OsmographBuild Your Own
Open reference hardware with a live configurator. Pick sensors, preview your rig, download a build plan.
Build your rigScent Search
4,800+ chemical-odour relationships from Pyrfume.
Find chemicals by smell
e.g. citrus, floral, woody, aldehydic
Find smells by chemical
e.g. vanillin, limonene, benzaldehyde
Join the community
Help build digital olfaction — rigs, datasets, and early access.
Donations go to cloud compute, sensor prototyping, and community building.
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