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CO2, particle and radon monitors
CO2, particle and radon monitors: the single most useful fact in this category is that a cheap "CO2" sensor often measures nothing of the kind — eCO2 is…
This launch guide maps the topic, the source base and the practical questions. Check the linked official authority before acting on a rule, deadline, price or safety requirement.
What this guide covers
The single most useful fact in this category is that a cheap "CO2" sensor often measures nothing of the kind — eCO2 is inferred from a VOC reading — and the page shows how to tell them apart before buying.
Item pages give the thresholds and where they come from (the indoor environment categories and the Finnish housing health decree), a computed ventilation estimate from how fast CO2 rises in a closed room, PM2.5 sensor humidity error from published field evaluations, TVOC index numbers and their limits, radon detectors with the 300 Bq/m³ reference level and the national radon maps, plus calibration against outdoor air. ~14 pages.
How to use it
Use CO2, particle and radon monitors to understand the inputs, units and assumptions before relying on an output. A useful result should be reproducible from the named source rather than presented as an unexplained score.
The page keeps the main question, its evidence base and its limits together in one canonical place. That makes it useful as a quick orientation and avoids splitting a broad subject into shallow pages before each narrower answer has enough verified material of its own.
Search vocabulary in four languages
Terminology changes across borders. These are example phrases people use for the same subject in Estonian, Finnish, Russian and English; they are included as a practical vocabulary aid, not as hidden keywords.
| Language | Example phrase |
|---|---|
| Estonian | co2 andur kodus norm |
| Finnish | hiilidioksidimittari sisäilma raja |
| Russian | датчик co2 норма в квартире |
| English | eco2 vs ndir sensor difference |
Evidence and provenance
The evidence map below records the primary, official or openly licensed material chosen for this guide. It is deliberately visible so a reader can tell the difference between a rule published by an authority, a measured dataset and an editorial explanation.
Source: EN 16798-1 category table (catalogue abstract), Finnish decree on housing health 545/2015 (Finlex, official), Estonian radon reference level and Geological Survey radon map (open), US EPA / AQ-SPEC low-cost sensor field evaluations (public domain). · checked 2026-09-09
Source names are preserved even where an authority changes its web address. No figure is added to this launch page unless it is already present in the cited source description or can be computed from a named dataset.
Scope and boundaries
This guide owns the explanatory layer for the topic. Personal decisions, diagnoses, legal determinations and live availability remain with the relevant professional or official service.
Connected TempoLife guides
The following paths are the intentional hand-offs named in the brief. They keep adjacent subjects separate while making the next useful reference easy to find.
Why it belongs on TempoLife
/home, /baltic-air-quality-nowcast-atlas, /airpurifier.
Frequently asked questions
What does this guide cover?
The single most useful fact in this category is that a cheap "CO2" sensor often measures nothing of the kind — eCO2 is inferred from a VOC reading — and the page shows how to tell them apart before buying. Item pages give the thresholds and where they come from (the indoor environment categories and the Finnish housing health decree), a computed ventilation estimate from how fast CO2 rises in a closed room, PM2.5 sensor humidity error from published field evaluations, TVOC index numbers and their limits, radon…
What evidence does it use?
EN 16798-1 category table (catalogue abstract), Finnish decree on housing health 545/2015 (Finlex, official), Estonian radon reference level and Geological Survey radon map (open), US EPA / AQ-SPEC low-cost sensor field evaluations (public domain).
Where does this guide stop?
It explains the topic and points to primary or official sources. It does not replace a qualified professional, an official decision, or advice based on your own circumstances.
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