---
title: MTRNitrogenDioxideConcentrationMeasurementMeasurementMedium.air
framework: matter
role: symbol
role_heading: Case
path: matter/mtrnitrogendioxideconcentrationmeasurementmeasurementmedium/air
---

# MTRNitrogenDioxideConcentrationMeasurementMeasurementMedium.air

## Declaration

```swift
case air
```