Devices and Parameters

Air Quality Data: locations and parameters

Defaults in both editions, starting with v2.3.0-rc.1:

Slot	Location	ID	Country	Model
1	ESYair Pro	196780	Switzerland	O-M-1PPSTON-CE
2	Sir Apollo Kagwa Road	172350	Uganda	O-M-1PPSTON-CE
3	BANTHI, LAMPHUN	189546	Thailand	O-M-1PPST-CE
4	Sri Jayawardenepura Kotte	189917	Sri Lanka	O-1PST
5	Siththimaavaa Hingun	76611	Maldives	O-1PS

Names, coordinates, contributors, availability and fields can change upstream. The first two models have dedicated gas hardware; their individual public-current responses now expose NO2/O3. The other three do not have those dedicated sensors. Main-app settings can replace slot 3 with another verified Max without gas sensors. Upgrades migrate existing saved settings on the same browser origin, prepend ESYair without duplication and retain custom devices. Restore five defaults in Settings to recover this exact list.

Parameter reference

Fields	Meaning and units
pm01, pm02, pm10 and corrected variants	PM1, PM2.5, PM10 in micrograms/m3
pm003Count	Particle count per 0.1 litre
rco2, rco2_corrected	CO2, ppm
atmp, atmp_corrected, heatindex	Temperature / heat index, degrees Celsius
rhum, rhum_corrected	Relative humidity, %
no2, o3	API-reported nitrogen dioxide / ozone concentrations, ppb
tvoc	API-reported TVOC, ppb
tvocIndex, noxIndex	VOC / NOx index or firmware value, not NO2/O3 concentration
tvocRaw, noxRaw	Raw signals; units unspecified here
no2WorkingElectrode, no2AuxiliaryElectrode, o3WorkingElectrode, o3AuxiliaryElectrode	Raw electrode signals, mV, not concentrations
afeTemp	Analog front-end temperature; unit unspecified in API schema
batteryVoltage, panelVoltage	Battery / solar-panel voltage, V
wifi, pres	Signal strength, dBm / pressure, hPa, where supplied
Timestamp, coordinates, model, firmware, contributor and other metadata	Original API record details

Actual fields vary by model and endpoint. All returned fields remain inspectable; unknown fields keep their original names and unspecified units. Parameter counts reflect each response rather than a fixed total. Public world-current responses may omit raw electrodes; an authorized current endpoint can expose them. Optional hourly buckets require a token authorized for those locations; availability varies. See the AirGradient API specification.

Reading gas values

Cards and details show NO2 and O3 in ppb. The main map selector can display either field. The app displays AirGradient's concentration fields, without deriving them from electrode voltages. Negative values are preserved and flagged as physically invalid concentrations; zero and positive numbers alone do not prove accuracy. Missing/null values stay unavailable. NOx index is never relabelled as NO2.

Check measurement time separately from collection time. Stale readings, offline status or collection failures can affect interpretation. The app does not certify calibration or accuracy. Testing and demo only; mistakes may be present.

Credits and licensing · Home

Compact parameter lists (v2.3.0-rc.2)

Click a map location to see a scrollable popup with PM2.5/AQI as the headline and small parameter/value rows. Device cards show the same list: PM2.5, PM10, PM1, particle count, CO2, NO2, O3, temperature, relative humidity and pressure, followed by every additional measurement returned by the API. NO2 and O3 use the same compact styling as the other fields. Original JSON and metadata remain available in the details. The supplementary edition keeps its raw-PM2.5 headline and does not calculate AQI. The main app labels raw/corrected PM2.5 separately; compact rows retain the original API fields and units.

• N/A: known unsupported by this model (currently dedicated NO2/O3 on non-gas models).
• N/D: no usable reading in an expected or explicitly returned API field. This may mean a missing sample, null/invalid data or an endpoint limitation; a field's presence alone does not prove hardware support.
• —: not reported, and model support has not been established (for example, omitted pressure). Absence is not treated as proof of unsupported hardware.

A legend accompanies each list; hover a row for its explanation. Zero and negative values remain unchanged; negative gas concentrations have a warning. Units are shown when known, and unknown units are explicitly left unspecified. Stale and retained readings keep their timestamp/status labels. Numerical compact values use up to six decimal places; the raw JSON retains the original response.