# MeasurementUnitEnum

    enum MeasurementUnitEnum

Measurement units.
- `


  ### [ppm](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO3ppmyA2GmF)


  ` Parts per million.

  #### Declaration

  Swift

      case ppm

- `


  ### [ppb](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO3ppbyA2GmF)


  ` Parts per billion.

  #### Declaration

  Swift

      case ppb

- `


  ### [ppt](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO3pptyA2GmF)


  ` Parts per trillion.

  #### Declaration

  Swift

      case ppt

- `


  ### [mgm3](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO4mgm3yA2GmF)


  ` Milligrams per cubic meter.

  #### Declaration

  Swift

      case mgm3

- `


  ### [ugm3](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO4ugm3yA2GmF)


  ` Micrograms per cubic meter.

  #### Declaration

  Swift

      case ugm3

- `


  ### [ngm3](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO4ngm3yA2GmF)


  ` Nanogram per cubic meter.

  #### Declaration

  Swift

      case ngm3

- `


  ### [pm3](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO3pm3yA2GmF)


  ` Particles per cubic meter.

  #### Declaration

  Swift

      case pm3

- `


  ### [bqm3](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO4bqm3yA2GmF)


  ` Becquerels per cubic meter.

  #### Declaration

  Swift

      case bqm3

- `


  ### [init(rawValue:)](https://developers.home.google.com/reference/swift/GoogleHomeTypes/Enums/Matter/OzoneConcentrationMeasurementTrait/MeasurementUnitEnum#/s:15GoogleHomeTypes6MatterO34OzoneConcentrationMeasurementTraitV0G8UnitEnumO8rawValueAGSgs6UInt64V_tcfc)


  ` Creates a new instance with the specified raw value.

  If there is no value of the type that corresponds with the specified raw
  value, this initializer returns `nil`. For example:

      enum PaperSize: String {
          case A4, A5, Letter, Legal
      }

      print(PaperSize(rawValue: "Legal"))
      // Prints "Optional(PaperSize.Legal)"

      print(PaperSize(rawValue: "Tabloid"))
      // Prints "nil"

  #### Declaration

  Swift

      init?(rawValue: UInt64)

  #### Parameters

  |---|---|
  | ` rawValue ` | The raw value to use for the new instance. |