---
title: MTRCarbonMonoxideConcentrationMeasurementMeasurementUnit.PPM
framework: matter
role: symbol
role_heading: Case
path: matter/mtrcarbonmonoxideconcentrationmeasurementmeasurementunit/ppm
---

# MTRCarbonMonoxideConcentrationMeasurementMeasurementUnit.PPM

## Declaration

```swift
case PPM
```