---
title: MTRCarbonDioxideConcentrationMeasurementMeasurementUnit.PPM
framework: matter
role: symbol
role_heading: Case
path: matter/mtrcarbondioxideconcentrationmeasurementmeasurementunit/ppm
---

# MTRCarbonDioxideConcentrationMeasurementMeasurementUnit.PPM

## Declaration

```swift
case PPM
```