Global Variable

HMCharacteristicTypeNitrogenDioxideDensity

The measured density of nitrogen dioxide.

Declaration

NSString *const HMCharacteristicTypeNitrogenDioxideDensity;

Discussion

The corresponding value is a number in units of micrograms per cubic meter.

See Also

Air Quality and Smoke Detection

HMCharacteristicTypeAirParticulateDensity

The density of air-particulate matter.

HMCharacteristicTypeAirParticulateSize

The size of the air-particulate matter.

HMCharacteristicTypeSmokeDetected

A smoke detection indicator.

HMCharacteristicTypeCarbonDioxideDetected

An indicator of abnormally high levels of carbon dioxide.

HMCharacteristicTypeCarbonDioxideLevel

The measured carbon dioxide level.

HMCharacteristicTypeCarbonDioxidePeakLevel

The highest recorded level of carbon dioxide.

HMCharacteristicTypeCarbonMonoxideDetected

An indicator of abnormally high levels of carbon monoxide.

HMCharacteristicTypeCarbonMonoxideLevel

The measured carbon monoxide level.

HMCharacteristicTypeCarbonMonoxidePeakLevel

The highest recorded level of carbon monoxide.

HMCharacteristicTypeOzoneDensity

The measured density of ozone.

HMCharacteristicTypePM10Density

The measured density of air-particulate matter of size 10 micrograms.

HMCharacteristicTypePM2_5Density

The measured density of air-particulate matter of size 2.5 micrograms.

HMCharacteristicTypeSulphurDioxideDensity

The measured density of sulphur dioxide.

HMCharacteristicTypeVolatileOrganicCompoundDensity

The measured density of volatile organic compounds.