developers.home-assistant/blog/2024-10-08-unit-of-conducti...

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---
author: Erik Montnemery
authorURL: https://github.com/emontnemery
title: "Changes to the UnitOfConductivity enum"
---
The `UnitOfConductivity` enum has been changed from:
```py
class UnitOfConductivity(StrEnum):
"""Conductivity units."""
SIEMENS = "S/cm"
MICROSIEMENS = "µS/cm"
MILLISIEMENS = "mS/cm"
```
To:
```py
class UnitOfConductivity(StrEnum):
"""Conductivity units."""
SIEMENS_PER_CM = "S/cm"
MICROSIEMENS_PER_CM = "µS/cm"
MILLISIEMENS_PER_CM = "mS/cm"
```
The old enum members can be used during a deprecation period of one year, to give time for custom integrations to migrate to the new enum members.
See [core PR #127919](https://github.com/home-assistant/core/pull/127919) for implementation details.