Clarity for your home.Want radon history, particle readings or CO2 measurements? Start with the question you want to explore, then check the exact model’s sensor list and how it reports each value.
View Plus provides a documented example of a multi-sensor monitor.
Read the measurements separately
| Parameter | What the documented example provides | Interpretation |
|---|---|---|
| Radon | Passive diffusion sampling and alpha spectrometry; averages over time | Radon concentration averaged over time |
| PM2.5 | Optical particle sensing using laser scattering; reported mass concentration | Particle amount; composition needs separate analysis |
| CO₂ | Non-dispersive infrared sensing; concentration in ppm | Carbon-dioxide concentration |
| VOCs | Broad metal-oxide sensor response to volatile compounds | A combined response to a mixture |
| Relative humidity | A percentage reading of relative humidity | Relative moisture in the air |
| Temperature | Air-temperature readings | Air temperature |
| Pressure | Air-pressure readings | Air pressure |
The methods and parameters come from View specifications, View Plus's sensor list and Airthings' VOC explanation. The limits in the final column follow from what each measurement covers; they describe how to interpret the recorded parameters.
Reading a VOC trend
Airthings describes a combined VOC response that depends on the mixture and environmental baseline. Its gas-detection guidance explains that individual chemical concentrations need a measurement designed for that substance.
For any model, check whether a claimed parameter comes from a dedicated measurement or an estimate derived from another signal. Read the method behind values labeled “equivalent” or “estimated”. View's documented NDIR CO₂ sensor provides a concrete method to inspect.
Sampling, averages and uploads are different
The View Plus starter guide documents sensor-specific sampling and different PM intervals under USB and battery power. That means the values on one dashboard need not describe identical time windows. Check the parameter, averaging period and latest upload before interpreting a change.
Initial adjustment also depends on the sensor. View calibration guidance describes a seven-day initial period for CO₂ and VOCs, while PM, temperature, humidity and pressure do not require that period. Radon needs its own measurement-duration decision.
Build your buying checklist
List the measurements you will actually revisit, how you will access their history and what decision each will inform. Compare Home 2 and View Plus if your current need is radon and you are considering additional sensors.
EPA's air-sensor overview distinguishes pollutant monitoring from emergency safety devices and notes remaining evidence gaps in indoor sensor performance. Use each sensor's record to inform the question it measures.
Documentation used
- Airthings — View sensor specifications (April 2026)Manufacturer specifications; sensor methods and conditional accuracy · checked 2026-10-12
- Airthings — View Plus specificationsManufacturer specifications · checked 2026-10-12
- Airthings — How the VOC sensor works (May 2022)Manufacturer explanation; mixture response and baseline limits · checked 2026-10-12
- Airthings — Gas detection and VOC limitations (March 2026)Manufacturer explanation; no individual chemical quantification · checked 2026-10-12
- Airthings — View Plus starter guideManufacturer instructions · checked 2026-10-12
- Airthings — View calibration period (April 2026)Manufacturer instructions; not an EPA testing protocol · checked 2026-10-12
- US EPA — Air sensor technology and indoor air quality (March 2026)US public guidance; sensor terminology and evidence limits · checked 2026-10-12