CO vs COâ‚‚: we measure one, not the other
Carbon monoxide and carbon dioxide sound alike and the abbreviations look alike. They are completely different gases. Terrestream measures COâ‚‚ only.
Articles tagged "Safety"
Filtered view. Return to /learn for the full reference.
All articles
Attached garages: the highest-risk source in most homes
A running engine ten feet from your living space. Cold-start emissions are the worst. Door seals matter more than you think.
Smoke and fire: why we are not a smoke alarm
The particle sensor sees smoke once it fills a room. A UL 217 smoke alarm sees it in seconds and screams loud enough to wake a sleeping family. They are not substitutes.
Radon: an alpha-particle hazard we cannot detect
Radon is the second-leading cause of lung cancer in the US after smoking. It cannot be detected by any optical, NDIR, or MOX sensor; only alpha-particle counters can see it.
What Terrestream does not measure
Terrestream measures a specific set of air-quality parameters. There are many hazards it does not measure at all - here is a non-exhaustive list of common ones, and the dedicated detector or test to use instead.
Lead paint and renovation dust: a metal hazard we cannot see
Homes built before 1978 (US) and before 1992 (Canada) are likely to contain lead paint. Renovating without containment releases lead-laden dust that no air-quality sensor can identify.
Asbestos in older homes: a fiber hazard outside our envelope
Asbestos was used in insulation, popcorn ceilings, vinyl flooring, and roofing through the 1980s. Disturbing it releases microscopic fibers we cannot detect; mesothelioma latency is decades.
The AI is an environmental advisor, not a medical one
The dashboard will tell you about your air. It will not diagnose, prescribe, or speculate about your health. The line between those two is bright and intentional.
Smoke detector vs IAQ monitor: not the same instrument
A common confusion: the sensor on your wall reads PM2.5, and smoke is PM2.5, so it must be a smoke alarm too. It is not. The two devices answer different questions on different timescales with different consequences for being wrong.
Breathe Better. Live Smarter.
Turn air-quality knowledge into action.
One sensor. Twelve signals. Indoor readings connected to outdoor context and plain-English recommendations. Everything you just read can be measured live in your own home.
$249 USD one-time
Buy Terrestream Explore the sensor- No subscription required
- 30-day returns
- 1-year limited warranty
- Fast shipping via FedEx
Six sensors. Twelve signals.
Built on genuine Sensirion, Bosch, and Texas Instruments sensors.
- COâ‚‚
- IAQ
- VOC
- NOâ‚“
- PM1
- PM2.5
- PM4
- PM10
- Temperature
- Humidity
- Pressure
- Light
Included
- In the box: the sensor, USB-C cable, power adapter, and printed field guide
- Dashboard and mobile app included
- Privacy-first air data
Works with
- Home Assistant
- MQTT
Home Assistant
MQTT