Thermio technical specs
Detailed specifications for hikers who want to dig deeper into sensors, accuracy, logging, battery, environmental limits, app features, and validation status.
Some values below are validated component specifications and some are pre-production product targets. Final production specs will be confirmed before launch.
Sensors and measurement
Temperature
±0.1 °C typical accuracy (sensor specification)
−30 to +60 °C operating range (target)
Validated component spec. Actual product accuracy may vary with enclosure and airflow conditions.
Humidity
±0.5 %RH typical accuracy (sensor specification)
0–100 %RH
Below approximately −20 °C, humidity readings may show reduced confidence.
Barometric pressure
±0.5 hPa absolute accuracy (sensor specification)
300–1100 hPa
Useful for pressure trend detection and altitude estimation.
Logging and data
- Default logging interval: 1 minute (target, configurable via app)
- On-device data storage with BLE sync to the companion app
- Historical graphs and trend views in the app
- CSV export for full data logs
- Each paired sensor is tracked and displayed separately in the app
App capabilities
The Thermio companion app connects to your sensors via Bluetooth.
- View current temperature, humidity, and pressure readings
- Browse historical graphs and pressure trends
- Track each paired sensor separately with individual data views
- Use Thermio and Thermio Mini together — the app shows both sensors’ values and graphs in one place
- Export data as CSV for your own analysis
- Set custom alert thresholds for temperature, humidity, and pressure changes
Available for iOS and Android.
Power and battery
- Thermio: CR2032 coin cell — 6+ months target runtime
- Thermio Mini: CR2016 coin cell — 3+ months target runtime
Battery life depends on logging interval and BLE sync frequency. User-replaceable coin cell.
Environmental and durability
- Operating temperature: −30 to +60 °C (target)
- Water-resistant for rain, splashes, and wet trail conditions
Designed for rain, splashes, and exposed trail use. Not intended for prolonged submersion. Final water-resistance specification will be confirmed before production.
Cold-tested to −18 °C. Pressure and temperature sensors perform well in cold conditions. Humidity accuracy may decrease below −20 °C.
Designed for trail use — clip it to your pack, guyline, or carabiner and leave it in the weather.
Connectivity
- Bluetooth Low Energy (BLE) sync with the companion app
- Sensor operates independently — no phone needed for on‑device readings or data logging
- Sync when in range to transfer stored data to the app
Physical specs
- Thermio weight: 9 g (target)
- Thermio Mini weight: 6 g (target)
- Thermio display: 1.28″ reflective memory LCD + bonded Gorilla Glass
- Thermio Mini: no display — data accessed via app
- 3D-printed enclosure
Validation and testing status
Sensor accuracy (T/RH/P)
Component-level sensor specs confirmed
Cold testing
Tested to −18 °C in real alpine conditions
Field testing
Multiple field units tested on real trails
Water resistance
Enclosure designed for rain and splash; final rating pending certification
Battery life
6+ months target for Thermio, 3+ months for Mini
App + BLE sync
Working BLE connection with companion app
Data logging + CSV export
Configurable logging with CSV export tested
Reflective memory LCD
Sunlight-readable display verified in field conditions
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